MURATA POWER SOLUTIONS UWQ-12/20-T48NT-C

UWQ-12/20-T48 Series www.murata-ps.com Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PRODUCT OVERVIEW The UWQ series offers high output current (up to loads. Excellent ripple and noise specifi cations 20 Amps) in an industry standard “quarter brick” assure compatibility to CPUs, ASICs, programmable package requiring no heat sink for most applica- logic and FPGAs. No minimum load is required. tions. The UWQ series delivers fi xed DC output For systems needing controlled startup/shutdown, voltages up to 240 Watts (12V @ 20A) for printed an external remote On/Off control may use either circuit board mounting. Wide range inputs of 18 positive or negative logic. T Typical unit ypical unit to 60 Volts DC (48 Volts nominal) are ideal for A wealth of self-protection features include datacom and telecom systems. input undervoltage lockout and overtemperature FEATURES The UWQ-12/20-T48xS offers a load sharing shutdown using an on-board temperature sensor; option for paralleling up to three modules in the overcurrent protection using the “hiccup” auto-  Fixed DC outputs, 12V @ 20A most demanding, power hungry applications. The restart technique, provides indefi nite short-circuit  Industry standard quarter brick 2.3” x 1.45” x UWQ-12/20-T48xT is trimmable from 10.8Vout to protection, along with output OVP. The synchronous 0.46” open frame package 13.2Vout and includes Sense pins to compensate rectifi er topology offers high effi ciency for minimal  Wide range 18 to 60 Vdc input voltages with for voltage drops at the load. heat generation and “no heat sink” operation. The 2250 Volt Basic isolation Advanced automated surface mount assembly UWQ series is certifi ed to safety standards UL/ and planar magnetics deliver galvanic isolation IEC/CSA 60950-1, 2nd edition. It meets class B  Remote ON/Off enable control rated at 2250 Vdc for basic insulation. To power EMI conducted emission compliance to EN55022,  DOSA-compatible pinouts and form factor digital systems, the outputs offer fast settling to CISPR22 with an external fi lter.  High effi ciency synchronous rectifi er topology current steps and tolerance of higher capacitive  Multiple-unit parallel operation for increased current  Stable no-load operation  Monotonic startup into pre-bias output condition APPLICATIONS  Certifi ed to UL/60950-1, CSA-C22.2 No. 60950-   1, 2nd edition safety approvals Embedded systems, datacom and telecom Instrumentation systems, R&D platforms, auto- installations, wireless base stations mated test fi xtures  Extensive self-protection, OVP, input undervolt-   age, current limiting and thermal shutdown Disk farms, data centers and cellular repeater sites Data concentrators, voice forwarding and speech processing systems   Trimmable output from 10.8V to 13.2V Remote sensor systems, dedicated controllers F1 +Vin (1) +Vout (8) Barrier External On/Off DC Control Controller Power (2) and Power Source Reference and Error Amplifier Trim (6) -Vin (3) -Vout (4) Figure 1. Connection Diagram Typical topology is shown. Murata Power Solutions recommends an external fuse. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 1 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input Iout Iin full R/N (mV pk-pk) Regulation (Max.) ➁ Effi ciency Dimensions (open frame) Vout (Amps, Power Vin Nom. Range Iin no load (Volts) max.) (Watts) Typ. Max. Line Load (Volts) (Volts) load (mA) (Amps) Min. Typ. (inches) (mm) Root Model ➀ UWQ-12/20-T48 12 20 240 100 120 ±1.0 ±1.5 48 18-60 90 5.43 90% 92% 2.30x1.45x0.46 max. 58.4x36.8x11.7 UWQ-12/20-T48xS 12 20 240 100 120 ±1.25 ±2.5 48 18-60 90 5.43 90% 92% 2.30x1.45x0.46 max. 58.4x36.8x11.7 UWQ-12/20-T48xT 12 20 240 100 120 ±0.25 ±0.3 48 18-60 80 5.43 90% 92% 2.30x1.45x0.46 max. 58.4x36.8x11.7 ➀ Please refer to the part number structure for additional ordering information and options. detailed specifi cations. Output capacitors are 1 μF || 10 μF with a 22μF input capacitor. These caps are ➁ All specifi cations are typical at nominal line voltage and full load, +25°C unless otherwise noted. See necessary for our test equipment and may not be needed for your application. PART NUMBER STRUCTURE UWQ - 12 / 20 T48 N T B S Lx - C - RoHS Hazardous Materials compliance Family C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard Series: Wide Input Pin length option Quarter Brick Blank = Standard pin length 0.180 in. (4.6 mm) L1 = 0.110 in. (2.79 mm) ➀ Nominal Output Voltage L2 = 0.145 in. (3.68 mm) ➀ Load Share Option Maximum Rated Output: Blank = No share Current in Amps S = Load share Input Voltage Range: Baseplate (optional) T48 = 18-60 Volts (48V nominal) Blank = No baseplate, standard B = Baseplate installed, optional On/Off Control Logic Trim & Sense Option N = Negative logic Blank = No trim and sense P = Positive logic T = Trim and sense ➀ Special quantity order is required; samples available with standard pin length only. ➁ Some model number combinations may not be available. See website or contact your local Murata sales representative. UWQ-12/20-T48NBL1-C Complete Model Number Example: Negative On/Off logic, baseplate installed, 0.110˝ pin length, RoHS-6 compliance www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 2 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters FUNCTIONAL SPECIFICATIONS, UWQ-12/20-T48 ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 18 48 70 Vdc Operating or non-operating, Input Voltage, Transient 75 Vdc 100 mS max. duration Isolation Voltage Input to output 2250 Vdc On/Off Remote Control Power on or off, referred to -Vin 0 13.5 Vdc Output Power 0 247.2 W Current-limited, no damage, Output Current 020A short-circuit protected Storage Temperature Range Vin = Zero (no power) -55 125 °C Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifi cations Table is not implied or recommended. INPUT Conditions ➀ ➂ Operating voltage range 18 48 60 Vdc Recommended External Fuse Fast blow 20 A Start-up threshold Rising input voltage 16 16.75 17.5 Vdc Undervoltage shutdown Falling input voltage 14.75 15.5 16.75 Vdc Internal Filter Type L-C Input current Full Load Conditions Vin = nominal 5.43 5.72 A Low Line Vin = minimum 14.65 15.34 A Inrush Transient Vin = 48V. 0.05 0.1 A2-Sec. Output in Short Circuit 50 100 mA No Load input current (T48xT models) Iout = minimum, unit = ON 80 150 mA No Load input current (all other models) Iout = minimum, unit = ON 90 150 mA Shut down mode input current 58 mA Refl ected (back) ripple current ➁ Measured at input with specifi ed fi lter 15 25 mA, RMS Pre-biased startup External output voltage < Vset Monotonic GENERAL and SAFETY Effi ciency Vin=48V, full load 90 92 % Vin=min 89.5 91 % Isolation Isolation Voltage, input to output With or without baseplate 2250 Vdc Isolation Voltage, input to baseplate With baseplate 1500 Vdc Isolation Voltage, output to baseplate With baseplate 1500 Vdc Insulation Safety Rating basic Isolation Resistance 100 MΩ Isolation Capacitance 1500 pF Safety (certifi ed to the following UL-60950-1, CSA-C22.2 No.60950-1, Yes requirements) IEC/60950-1, 2nd edition Per Telcordia SR-332, issue 1, class 3, ground 3 Calculated MTBF TBD Hours x 10 fi xed, Tambient = +25°C DYNAMIC CHARACTERISTICS (T48xT models) Fixed Switching Frequency 250 275 300 KHz Startup Time Power On, to Vout regulation band 60 65 mS Startup Time Remote ON to Vout Regulated 60 65 mS Dynamic Load Response 50-75-50% load step to 3% error band 220 275 μSec Dynamic Load Peak Deviation same as above ±500 ±700 mV DYNAMIC CHARACTERISTICS (all other models) Fixed Switching Frequency 180 200 220 KHz Startup Time Power On, to Vout regulation band 10 20 mS Startup Time Remote ON to Vout Regulated 10 20 mS Dynamic Load Response 50-75-50% load step to 3% error band 200 250 μSec Dynamic Load Peak Deviation same as above ±1100 ±1300 mV FEATURES and OPTIONS Remote On/Off Control ➃ “N” suffi x: Negative Logic, ON state ON = pin grounded or external voltage 0 1 Vdc Negative Logic, OFF state OFF = pin open or external voltage 3.5 13.5 Vdc Control Current open collector/drain 1 2 mA “P” suffi x: Positive Logic, ON state ON = pin open or external voltage 3.5 13.5 V Positive Logic, OFF state OFF = ground pin or external voltage 0 1 V Control Current open collector/drain 1 2 mA Base Plate "B" suffi x optional www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 3 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters FUNCTIONAL SPECIFICATIONS, UWQ-12/20-T48, (CONT.) OUTPUT Conditions ➀ Minimum Typical/Nominal Maximum Units Total Output Power 0.0 240 247.2 W Voltage Setting Accuracy, fi xed output At 50% load, not user adjustable 11.64 12 12.36 Vdc Output Voltage Range (T48xT models) User-adjustable -10 +10 % of Vnom. Overvoltage Protection Via magnetic feedback 15 Vdc Current Output Current Range 020 20 A Minimum Load No minimum load Current Limit Inception 96% of Vnom., cold condition 23.5 25.5 27.5 A Short Circuit Hiccup technique, autorecovery within 1.25% Short Circuit Current 12 A of Vout Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Hiccup current limiting Non-latching Regulation (standard 12/20-T48) ➄ Line Regulation Vin=min. to max., Vout=nom., full load ±1 % of Vout Load Regulation Iout=min. to max., Vin=nom. ±1.5 % of Vout Regulation (T48xS models) ➄ Line Regulation Vin=min. to max., Vout=nom., full load ±1.25 % of Vout Load Regulation Iout=min. to max., Vin=nom. ±2.5 % of Vout Regulation (T48xT models) ➄ Line Regulation Vin=min. to max., Vout=nom., full load ±0.25 % of Vout Load Regulation Iout=min. to max., Vin=nom. ±0.3 % of Vout 5 Hz- 20 MHz BW, Cout=1μF MLCC paralleled 100 120 mV pk-pk Ripple and Noise ➅ with 10μF tantalum Temperature Coeffi cient At all outputs 0.02 % of Vout./°C Maximum Capacitive Loading Low ESR 5000 μF Current Share Accuracy (2 units in parallel) Percent deviation from ideal sharing (50%) ±10 % (T48xS models) Remote Sense Compliance (T48xT models) Sense connected at load 10 % of Vout MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) 2.3x1.45x0.46 max. Inches (Please refer to outline drawing) LxWxH 58.4x36.8x11.68 mm Outline Dimensions (with baseplate) 2.3x1.45x0.5 Inches 58.4x36.8x12.7 mm Weight No baseplate 1.6 Ounces No baseplate 45 Grams With baseplate 2.24 Ounces With baseplate 63.5 Grams Through Hole Pin Diameter 0.04 & 0.06 Inches 1.016 & 1.52 mm Through Hole Pin Material Copper alloy TH Pin Plating Metal and Thickness Nickel subplate 50 μ-inches Gold overplate 5 μ-inches Baseplate Material Aluminum ENVIRONMENTAL Operating Ambient Temperature Range See derating curves -40 85 °C Operating Case Temperature With baseplate, no derating -40 110 °C Storage Temperature Vin = Zero (no power) -55 125 °C Thermal Protection/Shutdown Measured at hotspot 135 140 150 °C Electromagnetic Interference External fi lter is required Conducted, EN55022/CISPR22 B Class RoHS rating RoHS-6 Notes ➀ Unless otherwise noted, all specifi cations apply at Vin = nominal, nominal output voltage and full ➂ All models are stable and regulate to specifi cation under no load. output load. General conditions are near sea level altitude, no base plate installed and natural ➃ The Remote On/Off Control is referred to -Vin. convection airfl ow unless otherwise specifi ed. All models are tested and specifi ed with external ➄ Regulation specifi cations describe the output voltage changes as the line voltage or load current parallel 1 μF and 10 μF multi-layer ceramic output capacitors and a 22μF external input capacitor is varied from its nominal or midpoint value to either extreme. The load step is ±25% of full load (see Technical Notes). All capacitors are low-ESR types wired close to the converter. These capaci- current. tors are necessary for our test equipment and may not be needed in the user’s application. ➅ Output Ripple and Noise is measured with Cout = 1 μF || 10 μF, 20 MHz oscilloscope bandwidth ➁ Input (back) ripple current is tested and specifi ed over 5 Hz to 20 MHz bandwidth. Input fi ltering is and full resistive load. Cin = 33 μF/100V, Cbus = 220μF/100V and Lbus = 12 μH. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 4 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48-C Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 25 94 92 90 20 88 VIN = 18V 86 VIN = 24V 15 84 VIN = 36V VIN = 48V 82 VIN = 18V VIN = 60V 80 10 VIN = 24V VIN = 36V 78 VIN = 48V 76 5 VIN = 60V 74 72 0 70 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 Output Load Current (Amps) Load Current (Amps) Thermal image with hot spot at 10.8A with 25°C ambient temperature. Natural convection is used with no forced airfl ow. Identifi able and recommended maximum value to be verifi ed in application. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 5 of 29 Efficiency (%) Power Dissipation (Watts) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48-C Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 18 18 15 15 12 12 Natural Convection Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 9 1.0 m/s (200 LFM) 9 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 6 6 3 3 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 18 18 15 15 12 Natural Convection 12 0.5 m/s (100 LFM) Natural Convection 1.0 m/s (200 LFM) 0.5 m/s (100 LFM) 9 9 1.5 m/s (300 LFM) 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 6 6 3 3 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 18 15 12 9 Natural Convection 0.5 m/s (100 LFM) 6 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 3 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 6 of 29 Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48-C Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 19 19 17 17 15 15 13 13 11 11 Natural Convection Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 9 9 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 7 7 5 5 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 19 19 17 17 15 15 13 13 Natural Convection 0.5 m/s (100 LFM) Natural Convection 11 11 1.0 m/s (200 LFM) 0.5 m/s (100 LFM) 1.5 m/s (300 LFM) 1.0 m/s (200 LFM) 2.0 m/s (400 LFM) 9 9 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 7 7 5 5 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 19 17 15 13 11 Natural Convection 9 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 7 2.0 m/s (400 LFM) 5 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 7 of 29 Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48-C Start-up Delay (Vin = 48V, Iout = 0A, Cload = 0, Ta = +25°C) Ch1 = Vin, Ch2 = Vout Start-up Delay (Vin = 48V, Iout = 20A, Cload = 5000μF, Ta = +25°C) Ch1 = Vin, Ch2 = Vout On/Off Enable Delay (Vin = 48V, Vout = nom, Iout = 20A, Cload = 5000μF, Ta = +25°C) Ch1 Stepload Transient Response (Vin = 48V, Iout = 50-75-50% of Imax, = Enable, Ch2 = Vout. Cload = 1μF || 10μF, Io = 10A/div, Ta = +25°C) Ch2 = Vout, Ch4 = Iout Output ripple and Noise (Vin = 48V, Iout = 0A, Cload = 1μF || 10μF, Output ripple and Noise (Vin = 48V, Iout = 20A, Cload = 1μF || 10μF, Ta = +25°C, BW = 20Mhz) Ta = +25°C, BW = 20Mhz) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 8 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xS Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 25 94 92 90 20 88 VIN = 18V VIN = 24V 86 VIN = 36V 15 84 VIN = 18V VIN = 48V VIN = 24V 82 VIN = 60V VIN = 36V 10 80 VIN = 48V 78 VIN = 60V 76 5 74 72 0 70 2468 10 12 14 16 18 20 2 4 6 8 101214161820 Output Load Current (Amps) Load Current (Amps) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 18 18 15 15 12 12 Natural Convection Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 9 9 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 6 6 3 3 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 18 18 15 15 12 12 Natural Convection Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 9 9 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 6 6 2.0 m/s (400 LFM) 3 3 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 9 of 29 Output Current (Amps) Output Current (Amps) Efficiency (%) Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xS Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, without baseplate) 21 19 18 18 17 16 15 15 14 12 13 12 9 11 Natural Convection 10 Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 6 9 1.0 m/s (200 LFM) 1.0 m/s (200 LFM) 8 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 3 7 2.0 m/s (400 LFM) 6 0 5 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, without baseplate) (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, without baseplate) 19 19 18 18 17 17 16 15 16 14 15 13 12 14 11 13 Natural Convection 10 0.5 m/s (100 LFM) 9 12 1.0 m/s (200 LFM) 8 Natural Convection 11 7 1.5 m/s (300 LFM) 0.5 m/s (100 LFM) 10 6 2.0 m/s (400 LFM) 1.0 m/s (200 LFM) 5 9 1.5 m/s (300 LFM) 4 2.0 m/s (400 LFM) 8 3 2 7 1 6 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, without baseplate) (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, without baseplate) 19 19 18 18 17 17 16 16 15 15 14 14 13 13 12 12 11 11 10 10 9 9 Natural Convection 8 8 0.5 m/s (100 LFM) 7 7 1.0 m/s (200 LFM) 6 6 Natural Convection 1.5 m/s (300 LFM) 5 5 0.5 m/s (100 LFM) 2.0 m/s (400 LFM) 4 4 1.0 m/s (200 LFM) 3 3 1.5 m/s (300 LFM) 2 2 2.0 m/s (400 LFM) 1 1 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 10 of 29 Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xS Start-up Delay (Vin=48V, Iout=0A, Cload=5000μF, Ta=+25°C) Ch1= Vin, Ch2= Vout Start-up Delay (Vin=48V, Iout=20A, Cload=5000μF, Ta=+25°C) Ch1= Vin, Ch2= Vout Start-up Parallel Operation (Vin=48V, Iout=full load, Cload=10000μF, Ta=+25°C) Enable Start-up Delay (Vin=48V, Iout=20A, Cload=5000μF, Ta=+25°C) Ch1= Enable, Ch1= Vin, Ch2, Ch3= Vout Ch2= Vout Output Ripple and Noise (Vin=48V, Iout=0A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz) Output Ripple and Noise (Vin=48V, Iout=20A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 11 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xS Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax, Cload=1μF || 10μF, Thermal image with hot spot at 10.8A with 25°C ambient temperature. Io=10A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout Natural convection is used with no forced airfl ow. Identifi able and recommended maximum value to be verifi ed in application. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 12 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xT Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 30 94 92 25 90 88 VIN = 18V 20 86 VIN = 24V 84 VIN = 36V 15 VIN = 18V VIN = 48V 82 VIN = 24V VIN = 60V 80 VIN = 36V 10 VIN = 48V 78 VIN = 60V 76 5 74 72 0 2 4 6 8 10 12 14 16 18 20 70 2 4 6 8 101214161820 Output Load Current (Amps) Load Current (Amps) Thermal image with hot spot at 8.9A with 25°C ambient temperature. Natural convection is used with no forced airfl ow. Identifi able and recommended maximum value to be verifi ed in application www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 13 of 29 Efficiency (%) Power Dissipation (Watts) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xT Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 20 20 19 19 18 18 17 17 16 16 15 15 14 14 13 13 Natural Convection Natural Convection 12 12 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 11 11 1.0 m/s (200 LFM) 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 10 10 1.5 m/s (300 LFM) 2.0 m/s (400 LFM) 9 2.0 m/s (400 LFM) 9 8 8 7 7 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 21 20 19 18 18 17 15 16 15 14 12 13 12 Natural Convection Natural Convection 9 11 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 10 1.0 m/s (200 LFM) 1.0 m/s (200 LFM) 9 6 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 8 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 7 3 6 5 4 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, with baseplate) 21 18 15 12 9 Natural Convection 0.5 m/s (100 LFM) 6 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 3 2.0 m/s (400 LFM) 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 14 of 29 Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters PERFORMANCE DATA, UWQ-12/20-T48xT Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 18V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) (Vin = 24V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 18 21 20 17 19 16 18 15 17 14 16 15 13 14 12 13 11 12 Natural Convection Natural Convection 10 0.5 m/s (100 LFM) 11 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 10 9 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 9 8 2.0 m/s (400 LFM) 1.5 m/s (300 LFM) 8 2.0 m/s (400 LFM) 7 7 6 6 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level Maximum Current Temperature Derating at sea level (Vin = 36V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) (Vin = 48V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 20 20 19 18 18 17 16 16 14 15 14 12 13 12 10 11 8 Natural Convection 10 Natural Convection 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 9 6 1.0 m/s (200 LFM) 1.0 m/s (200 LFM) 8 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 4 7 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 6 2 5 0 4 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) Maximum Current Temperature Derating at sea level (Vin = 60V, air fl ow from Pin 3 to Pin 1 on PCB, no baseplate) 18 16 14 12 10 8 6 Natural Convection 0.5 m/s (100 LFM) 4 1.0 m/s (200 LFM) 1.5 m/s (300 LFM) 2 2.0 m/s (400 LFM) 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 15 of 29 Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters TYPICAL PERFORMANCE DATA, UWQ-12/20-T48xT Start-up Delay (Vin=48V, Iout=0A, Cload=5000μF, Ta=+25°C) Ch1= Vin, Ch2= Vout Start-up Delay (Vin=48V, Iout=20A, Cload=5000μF, Ta=+25°C) Ch1= Vin, Ch2= Vout On/Off Enable Delay (Vin=48V, Vout=nom, Iout=20A, Cload=5000μF, Ta=+25°C) Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax, Cload=1μF || 10μF, Ch1= Enable, Ch2= Vout. Io=10A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout Output ripple and Noise (Vin=48V, Iout=0A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz) Output ripple and Noise (Vin=48V, Iout=20A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz) www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 16 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS (OPEN FRAME)—STANDARD AND T48xS MODELS TOP VIEW END VIEW END VIEW 58.4 [11.68] 4.78 2.30 0.46 0.188* 36.8 1° MAX 1.45 (ALL PINS) 0.26 0.010 Mtg Plane MIN SIDE VIEW BOTTOM CLEARANCE *Alternate pin lengths available (Contact Murata Power Solutions for information). Pin location dimensions apply at circuit board level. .062 SHOULDER .083 SHOULDER MATERIAL: (AT 40 MIL PINS) (AT 60 MIL PINS) .040 PINS: COPPER ALLOY .060 PINS: COPPER ALLOY 1.02±0.05 1.52±0.05 FINISH: (ALL PINS) 0.040±.002 0.060±.002 GOLD (5μ"MIN) OVER NICKEL (50μ" MIN) @ PINS 1-3 @ PINS 4 & 8 50.80 2.000 REF 3.8 50.80 0.15 2.000 7.61 0.300 3 4 15.24 C L 0.600 2 1 8 BOTTOM VIEW Dimensions are in inches (mm) shown for ref. only. I/O Connections (pin side view) Third Angle Projection Pin Function Pin Function 1 +Vin 4 -Vout 2 Remote On/Off Control 3 -Vin 8 +Vout Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 17 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS (BASEPLATE)—STANDARD AND T48xS MODELS 4x M3x0.5 THREADED HOLE (.10 MAX SCREW PENETRATION) TOP VIEW 58.4 END VIEW END VIEW 2.30 12.7 47.24 4.78 0.50 1.860 0.188 * 36.8 26.16 1° MAX 1.45 1.030 (ALL PINS) 0.26 0.010 Mtg Plane MIN SIDE VIEW BOTTOM CLEARANCE OPTIONAL BASEPLATE *Alternate pin lengths available (Contact Murata Power Solutions for information). 'B' OPTION Pin location dimensions apply at circuit board level. .062 SHOULDER .083 SHOULDER (AT 40 MIL PINS) (AT 60 MIL PINS) MATERIAL: .040 PINS: COPPER ALLOY 1.02±0.05 1.52±0.05 .060 PINS: COPPER ALLOY 0.040±.002 .060±.002 FINISH: (ALL PINS) @ PINS 1-3 @ PINS 4 & 8 GOLD (5μ"MIN) OVER NICKEL (50μ" MIN) 50.80 2.000 REF 3.8 50.80 0.15 2.000 7.61 0.300 3 4 2 15.24 C 0.600 L 1 8 BOTTOM VIEW Dimensions are in inches (mm) shown for ref. only. I/O Connections (pin side view) Third Angle Projection Pin Function Pin Function 1 +Vin 4 -Vout 2 Remote On/Off Control 3 -Vin 8 +Vout Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 18 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters RECOMMENDED FOOTPRINT—STANDARD AND T48xS MODELS Recommended Footprint (view through converter) REF: DOSA Standard Specification for Quarter-Brick DC/DC Converters FINISHED HOLE SIZES @ PINS 1-3 (PER IPC-D-275, LEVEL C) TOP VIEW 0.048-0.062 C L (PRI) (SEC) 1 8 7.62 0.300 37.3 2 C C 1.47 L L 7.62 0.300 4 3 FINISHED HOLE SIZES @ PINS 4 & 8 0.100 MIN (PER IPC-D-275, LEVEL C) 25.4 @ 1-4, 8 0.070-0.084 1.00 FOR PIN 50.80 SHOULDERS 2.000 58.9 2.32 It is recommended that no parts be placed beneath converter (hatched area). Dimensions are in inches (mm) shown for ref. only. I/O Connections (pin side view) Third Angle Projection Pin Function Pin Function 1 +Vin 4 -Vout 2 Remote On/Off Control 3 -Vin 8 +Vout Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 19 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS (OPEN FRAME)—T48xT MODELS TOP VIEW END VIEW 58.4 11.7 END VIEW 2.30 .46 4.78 .188 (NOTE 1) 36.8 1° MAX 1.45 (ALL PINS) 0.25 .010 MIN BOTTOM Mtg Plane CLEARANCE SIDE VIEW .062 SHOULDER MATERIAL: .040 PINS: COPPER ALLOY 1.57±0.05 (AT 40 MIL PINS) .062 PINS: COPPER ALLOY .062±.002 1.02±0.05 @PINS 4 & 8 FINISH: (ALL PINS) .040±.002 GOLD (5μ"MIN) OVER NICKEL (50μ" MIN) @PINS 1-3 2.000 REF 3.8 50.80 .15 2.000 7.62 .300 3 4 5 6 C L 7.62 2 7 .300 1 8 3.81 .150 3.81 BOTTOM VIEW 1. ALTERNATE PIN LENGTHS AVAILABLE (SEE PART NUMBER STRUCTURE) .150 (PIN SIDE) 2. COMPONENTS SHOWN ARE FOR REF ONLY 3. DIMENSIONS ARE IN INCHES [mm] 4. PIN LOCATION DIMENSIONS APPLY AT CIRCUIT BOARD LEVEL INPUT/OUTPUT CONNECTIONS 5. THESE CONVERTERS MEET THE MECHANICAL SPECIFICATIONS OF A QUARTER BRICK DC-DC Pin Function CONVERTER 1 +Vin Dimensions are in inches (mm shown for ref. only). 2 Remote On/Off * Third Angle Projection 3 -Vin 4 -Vout 5 -Sense 6Trim 7 +Sense Tolerances (unless otherwise specified): 8 +Vout .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ *The Remote On/Off can be provided with either positive (P suffi x) or Components are shown for reference only and may vary between units. negative (N suffi x) logic. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 20 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS (BASEPLATE)—T48xT MODELS TOP VIEW END VIEW 58.4 2.30 12.2 END VIEW 47.24 0.48 4.78 1.860 0.188 36.8 26.16 1° MAX M3x0.5 x 0.10 MAX 1.45 1.030 (ALL PINS) PENETRATION (x4) 0.25 0.010 MIN BOTTOM Mtg Plane CLEARANCE SIDE VIEW 0.062 SHOULDER 1.57±0.05 (AT 40 MIL PINS) 0.062±0.002 MATERIAL: 1.02±0.05 @PINS 4 & 8 0.040 PINS: COPPER ALLOY 0.040±0.002 0.062 PINS: COPPER ALLOY @PINS 1-3 FINISH: (ALL PINS) GOLD (5μ"MIN) OVER NICKEL (50μ" MIN) 2.000 REF 3.8 50.80 0.15 2.000 7.62 3.81 0.300 0.150 3 4 5 6 C 2 L 7.62 7 0.300 1 8 3.81 0.150 3.81 BOTTOM VIEW 1. ALTERNATE PIN LENGTHS AVAILABLE (SEE PART NUMBER STRUCTURE) 0.150 (PIN SIDE) 2. COMPONENTS SHOWN ARE FOR REF ONLY 3. DIMENSIONS ARE IN INCHES [mm] 4. PIN LOCATION DIMENSIONS APPLY AT CIRCUIT BOARD LEVEL INPUT/OUTPUT CONNECTIONS 5. THESE CONVERTERS MEET THE MECHANICAL Pin Function SPECIFICATIONS OF A QUARTER BRICK DC-DC CONVERTER 1 +Vin Dimensions are in inches (mm shown for ref. only). 2 Remote On/Off * Third Angle Projection 3 -Vin 4 -Vout 5 -Sense 6Trim 7 +Sense Tolerances (unless otherwise specified): 8 +Vout .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ *The Remote On/Off can be provided with either positive (P suffi x) or Components are shown for reference only and may vary between units. negative (N suffi x) logic. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 21 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters RECOMMENDED FOOTPRINT—T48xT MODELS RECOMMENDED FOOTPRINT (VIEW THROUGH CONVERTER) REF: DOSA STANDARD SPECIFICATION FOR QUARTER BRICK DC/DC CONVERTERS FINISHED HOLE SIZES @ 1-3, 5-7 TOP VIEW (PER IPC-D-275, LEVEL C) 0.048-0.062 C (PRI) (SEC) L 3.81 7.62 0.150 0.300 1 8 7 2 37.3 C C L L 6 1.47 5 3.81 7.62 4 0.150 3 0.300 FINISHED HOLE SIZES 0.100 MIN 25.4 @ PINS 4 & 8 @ 1-3, 5-7 (PER IPC-D-275, LEVEL C) 1.00 FOR PIN 0.070-0.084 50.80 SHOULDERS 2.000 58.9 2.32 IT IS RECOMMENDED THAT NO PARTS BE PLACED BENEATH CONVERTER (HATCHED AREA) Dimensions are in inches (mm shown for ref. only). Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only and may vary between units. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 22 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters STANDARD PACKAGING 9.92 9.92 (251.97) (251.97) REF REF Each static dissipative polyethylene foam tray accommodates 15 converters in a 3 x 5 array. 0.88 (22.35) REF 2.75 (69.85) ±.25 closed height 10.50 (266.7) ±.25 11.00 (279.4) ±.25 Carton accommodates two (2) trays yielding 30 converters per carton Dimensions are in inches (mm) shown for ref. only. Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 23 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters TECHNICAL NOTES Input Fusing Certain applications and/or safety agencies may require fuses at the inputs of Vin power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. For CH1 greatest safety, we recommend a fast blow fuse installed in the ungrounded On/Off input supply line. The installer must observe all relevant safety standards and regulations. For safety agency approvals, install the converter in compliance with the end-user CH2 Vout safety standard. Parallel Load Sharing (S Option, Load Sharing) Two or more converters may be connected in parallel at both the input and CH3 output terminals to support higher output current (total power, see fi gure 2) or to CH1 = Vin CH2 = On/Off CH3 = Vout improve reliability due to the reduced stress that results when the modules are Figure 3. Typical Turn On for Positive Logic Modules operating below their rated limits. For applications requiring current share, follow the guidelines below. The output voltage will decrease when the load current is CAUTION: This converter is not internally fused. To avoid danger to persons or increased. Our goal is to have each converter contribute nearly identical current equipment and to retain safety certifi cation, the user must connect an external into the output load under all input, environmental and load conditions. fast-blow input fuse as listed in the specifi cations. Be sure that the PC board pad area and etch size are adequate to provide enough current so that the fuse F1 +Vin +Vout will blow with an overload. On/Off Using Parallel Connections – Redundancy (N+1) –Vin –Vout The redundancy connections in fi gure 4 requires external user supplied “OR”ing diodes or “OR”ing MOSFETs for reliability purposes. The diodes allow + for an uninterruptable power system operation in case of a catastrophic failure F2 + + +Vin +Vout (shorted output) by one of the converters. Input Input On/Off LOAD Source Filter The diodes should be identical part numbers to enhance balance between the –Vin –Vout – – converters. The default factory nominal voltage should be suffi ciently matched between converters. The OR’ing diode system is the responsibility of the user. – On/Off Signal Be aware of the power levels applied to the diodes and possible heat sink F3 +Vin +Vout requirements. On/Off –Vin –Vout Figure 2. Load Sharing Block Diagram F1 +Vin +Vout Using Parallel Connections – Load Sharing (Power Boost)  All converters must be powered up and powered down simultaneously. Use On/Off a common input power source. –Vin –Vout  It is required to use a common Remote On/Off logic control signal to turn on modules (see fi gure 2). +  When Vin has reached steady state, apply control signal to the all modules. F2 +Vin +Vout + + Figure 3 illustrates the turn on process for positive logic modules. Input Input On/Off  LOAD First power up the parallel system (all converters) with a load not exceed- Source Filter –Vin –Vout ing the rated load of each converter and allow converters to settle (typically – – 20-100mS) before applying full load. As a practical matter, if the loads are – downstream PoL converters, power these up shortly after the converter has On/Off Signal reached steady state output. Also be aware of the delay caused by charging F3 +Vin +Vout up external bypass capacitors. On/Off  It is critical that the PCB layout incorporates identical connections from each –Vin –Vout module to the load; use the same trace rating and airfl ow/thermal environ- ments. If you add input fi lter components, use identical components and layout.  When converters are connected in parallel, allow for a safety factor of at Figure 4. Redundant Parallel Connections least 10%. Up to 90% of max output current can be used from each module. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 24 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters Schottky power diodes with approximately 0.3V drops or “OR”ing MOSFETs inductance. Excessive input inductance may inhibit operation. The DC input may be suitable in the loop whereas 0.7 V silicon power diodes may not be regulation specifi es that the input voltage, once operating, must never degrade advisable. In the event of an internal device fault or failure of the mains power below the Shut-Down Threshold under all load conditions. Be sure to use modules on the primary side, the other devices automatically take over the adequate trace sizes and mount components close to the converter. entire supply of the loads. In the basic N+1 power system, the “N” equals the I/O Filtering, Input Ripple Current and Output Noise number of modules required to fully power the system and “+1” equals one All models in this converter series are tested and specifi ed for input refl ected back-up module that will take over for a failed module. If the system consists ripple current and output noise using designated external input/output compo- of two power modules, each providing 50% of the total load power under nents, circuits and layout as shown in the fi gures below. External input capaci- normal operation and one module fails, another one delivers full power to the tors (CIN in the fi gure) serve primarily as energy storage elements, minimizing load. This means you can use smaller and less expensive power converters as line voltage variations caused by transient IR drops in the input conductors. Us- the redundant elements, while achieving the goal of increased availability. ers should select input capacitors for bulk capacitance (at appropriate frequen- Input Under-Voltage Shutdown and Start-Up Threshold cies), low ESR and high RMS ripple current ratings. In the fi gure below, the CBUS Under normal start-up conditions, converters will not begin to regulate properly and LBUS components simulate a typical DC voltage bus. Your specifi c system until the rising input voltage exceeds and remains at the Start-Up Threshold confi guration may require additional considerations. Please note that the values Voltage (see Specifi cations). Once operating, converters will not turn off until of CIN, LBUS and CBUS may vary according to the specifi c converter model. the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the input voltage rises again above the Start-Up TO Threshold. This built-in hysteresis prevents any unstable on/off operation at a CURRENT OSCILLOSCOPE PROBE single input voltage. +VIN LBUS Users should be aware however of input sources near the Under-Voltage Shut- + down whose voltage decays as input current is consumed (such as capacitor – VIN CBUS CIN + inputs), the converter shuts off and then restarts as the external capacitor re- – charges. Such situations could oscillate. To prevent this, make sure the operating −VIN input voltage is well above the UV Shutdown voltage AT ALL TIMES. CIN = 33μF, ESR < 200mΩ @ 100kHz Start-Up Delay CBUS = 220μF, 100V Assuming that the output current is set at the rated maximum, the Vin to Vout Start- LBUS = 12μH Up Delay (see Specifi cations) is the time interval between the point when the rising Figure 5. Measuring Input Ripple Current input voltage crosses the Start-Up Threshold and the fully loaded regulated output voltage enters and remains within its specifi ed regulation band. Actual measured times will vary with input source impedance, external input capacitance, input volt- In critical applications, output ripple and noise (also referred to as periodic and age slew rate and fi nal value of the input voltage as it appears at the converter. random deviations or PARD) may be reduced by adding fi lter elements such as multiple external capacitors. Be sure to calculate component temperature rise These converters include a soft start circuit to moderate the duty cycle of the from refl ected AC current dissipated inside capacitor ESR. PWM controller at power up, thereby limiting the input inrush current. The On/Off Remote Control interval from inception to VOUT regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On com- mand until the output enters and remains within its specifi ed regulation band. +VOUT The specifi cation assumes that the output is fully loaded at maximum rated current. RLOAD SCOPE C1 C2 Input Source Impedance −VOUT These converters will operate to specifi cations without external components, assuming that the source voltage has very low impedance and reasonable in- put voltage regulation. Since real-world voltage sources have fi nite impedance, performance is improved by adding external fi lter components. Sometimes only C1 = 1μF a small ceramic capacitor is suffi cient. Since it is diffi cult to totally characterize C2 = 10μF LOAD 2-3 INCHES (51-76mm) FROM MODULE all applications, some experimentation may be needed. Note that external input capacitors must accept high speed switching currents. Figure 6. Measuring Output Ripple and Noise (PARD) Because of the switching nature of DC-DC converters, the input of these converters must be driven from a source with both low AC impedance and adequate DC input regulation. Performance will degrade with increasing input www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 25 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters Floating Outputs will power down the unit, and the output voltage will decrease. After a time-out period, the PWM will automatically attempt to restart, causing the output volt- Since these are isolated DC-DC converters, their outputs are “fl oating” with age to ramp up to its rated value. It is not necessary to power down and reset respect to their input. The essential feature of such isolation is ideal ZERO the converter for this automatic OVP-recovery restart. CURRENT FLOW between input and output. Real-world converters however do exhibit tiny leakage currents between input and output (see Specifi cations). If the fault condition persists and the output voltage climbs to excessive levels, These leakages consist of both an AC stray capacitance coupling component the OVP circuitry will initiate another shutdown cycle. This on/off cycling is and a DC leakage resistance. When using the isolation feature, do not allow referred to as “hiccup” mode. the isolation voltage to exceed specifi cations. Otherwise the converter may be damaged. Designers will normally use the negative output (-Output) as Output Fusing the ground return of the load circuit. You can however use the positive output The converter is extensively protected against current, voltage and temperature (+Output) as the ground return to effectively reverse the output polarity. extremes. However, your application circuit may need additional protection. In the extremely unlikely event of output circuit failure, excessive voltage could be applied Minimum Output Loading Requirements to your circuit. Consider using an appropriate external protection. These converters employ a synchronous rectifi er design topology. All models regulate within specifi cation and are stable under no load to full load conditions. Current Limiting (Power limit with current mode control) Operation under no load might however slightly increase output ripple and noise. As power demand increases on the output and enters the specifi ed “limit inception range” (current in voltage mode and power in current mode) limiting Thermal Shutdown circuitry activates in the DC-DC converter to limit/restrict the maximum current To protect against thermal over-stress, these converters include thermal or total power available. In voltage mode, current limit can have a “constant or shutdown circuitry. If environmental conditions cause the temperature of the foldback” characteristic. In current mode, once the current reaches a certain DC-DC’s to rise above the Operating Temperature Range up to the shutdown range the output voltage will start to decrease while the output current con- temperature, an on-board electronic temperature sensor will power down tinues to increase, thereby maintaining constant power, until a maximum peak the unit. When the temperature decreases below the turn-on threshold, the current is reached and the converter enters a “hiccup” (on off cycling) mode of converter will automatically restart. There is a small amount of hysteresis to operation until the load is reduced below the threshold level, whereupon it will prevent rapid on/off cycling. CAUTION: If you operate too close to the thermal return to a normal mode of operation. Current limit inception is defi ned as the limits, the converter may shut down suddenly without warning. Be sure to point where the output voltage has decreased by a pre-specifi ed percentage thoroughly test your application to avoid unplanned thermal shutdown. (usually a 2% decrease from nominal). Temperature Derating Curves Short Circuit Condition (Current mode control) The graphs in this data sheet illustrate typical operation under a variety of condi- The short circuit condition is an extension of the “Current Limiting” condition. tions. The Derating curves show the maximum continuous ambient air temperature the PWM When the monitored peak current signal reaches a certain range, and decreasing maximum output current which is acceptable under increasing controller’s outputs are shut off thereby turning the converter “off.” This is forced airfl ow measured in Linear Feet per Minute (“LFM”). Note that these are followed by an extended time out period. This period can vary depending on AVERAGE measurements. The converter will accept brief increases in temperature other conditions such as the input voltage level. Following this time out period, and/or current or reduced airfl ow as long as the average is not exceeded. the PWM controller will attempt to re-start the converter by initiating a “normal start cycle” which includes softstart. If the “fault condition” persists, another Note that the temperatures are of the ambient airfl ow, not the converter itself “hiccup” cycle is initiated. This “cycle” can and will continue indefi nitely until which is obviously running at higher temperature than the outside air. Also note such time as the “fault condition” is removed, at which time the converter will that “natural convection” is defi ned as very low fl ow rates which are not using resume “normal operation.” Operating in the “hiccup” mode during a fault fan-forced airfl ow. Depending on the application, “natural convection” is usu- condition is advantageous in that average input and output power levels are ally about 30-65 LFM but is not equal to still air (0 LFM). held low preventing excessive internal increases in temperature. Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airfl ow. We use both thermocouples and an Remote On/Off Control infrared camera system to observe thermal performance. As a practical matter, On the input side, a remote On/Off Control can be specifi ed with either positive it is quite diffi cult to insert an anemometer to precisely measure airfl ow in or negative logic as follows: most applications. Sometimes it is possible to estimate the effective airfl ow if Positive: Models equipped with positive logic are enabled when the On/Off pin you thoroughly understand the enclosure geometry, entry/exit orifi ce areas and is left open or is pulled high to +13.5VDC with respect to –VIN. An internal bias the fan fl owrate specifi cations. current causes the open pin to rise to +VIN. Positive-logic devices are disabled CAUTION: If you exceed these Derating guidelines, the converter may have an when the On/Off is grounded or brought to within a low voltage (see Specifi ca- unplanned Over Temperature shut down. Also, these graphs are all collected tions) with respect to –VIN. near Sea Level altitude. Be sure to reduce the derating for higher altitude. Negative: Models with negative logic are on (enabled) when the On/Off is Output Overvoltage Protection (OVP) grounded or brought to within a low voltage (see Specifi cations) with respect to –VIN. The device is off (disabled) when the On/Off is left open or is pulled high This converter monitors its output voltage for an over-voltage condition using to +13.5VDC Max. with respect to –VIN. an on-board electronic comparator. The signal is optically coupled to the pri- mary side PWM controller. If the output exceeds OVP limits, the sensing circuit www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 26 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters Dynamic control of the On/Off function should be able to sink the specifi ed [1] Conducted Emissions Parts List signal current when brought low and withstand specifi ed voltage when brought Reference Part Number Description Vendor high. Be aware too that there is a fi nite time in milliseconds (see Specifi cations) L1 PE-62913 1mH,6A Pulse between the time of On/Off Control activation and stable, regulated output. This L3 500uH,10A, MPS 500uH,10A Murata time will vary slightly with output load type and current and input conditions. C8 2.2μFd Murata Qty 2 - Electrolytic Capacitor C7 VZ Series Panasonic There are two CAUTIONs for the On/Off Control: 22μFd, 100V C16, C17 .22μFd Unknown CAUTION: While it is possible to control the On/Off with external logic if you carefully observe the voltage levels, the preferred circuit is either an open [2] Conducted Emissions Test Equipment Used drain/open collector transistor or a relay (which can thereupon be controlled Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC by logic). The On/Off prefers to be set at approx. +13.5V (open pin) for the ON state, assuming positive logic. Rohde & Schwarz Software ESPC-1 Ver. 2.20 CAUTION: Do not apply voltages to the On/Off pin when there is no input power HP11947A Transient Limiter (Agilent) voltage. Otherwise the converter may be permanently damaged. OHMITE 25W – Resistor combinations DC Source Programmable DC Power Supply Model 62012P-100-50 +VCC [3] Layout Recommendations Most applications can use the fi ltering which is already installed inside the converter or with the addition of the recommended external capacitors. For greater emissions suppression, consider additional fi lter components and/or ON/OFF CONTROL shielding. Emissions performance will depend on the user’s PC board layout, the chassis shielding environment and choice of external components. Please refer to Application Note GEAN02 for further discussion. -VIN Since many factors affect both the amplitude and spectra of emissions, we recommend using an engineer who is experienced at emissions suppression. Trimming Output Voltage Figure 7. Driving the On/Off Control Pin (suggested circuit) UWQ converters have a trim capability (pin 6) that enables users to adjust the output voltage from +10% to –10% (refer to the trim equations in the table Emissions Performance below). Adjustments to the output voltage can be accomplished with a single fi xed resistor as shown in Figures 9 and 10. A single fi xed resistor can increase Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are or decrease the output voltage depending on its connection. Resistors should be located close to the converter and have TCR’s less than 100ppm/°C to employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power minimize sensitivity to changes in temperature. If the trim function is not used, leave the trim pin open. while doing the tests. Standard UWQs have a “positive trim” where a single resistor connected from The recommended external input and output capacitors (if required) are includ- ed. Please refer to the fundamental switching frequency. All of this information the Trim pin (pin 6) to the +Sense (pin 7) will increase the output voltage. A resistor connected from the Trim Pin (pin 6) to the –Sense (pin 5) will decrease is listed in the Product Specifi cations. An external discrete fi lter is installed and the circuit diagram is shown below. the output voltage. Trim adjustments greater than the specifi ed +10%/–10% can have an adverse UWQ EMI 200W Test Card Resistive affect on the converter’s performance and are not recommended. Excessive 48Vdc in, 12Vout, 17Amps Load voltage differences between VOUT and Sense, in conjunction with trim adjust- UUT ment of the output voltage, can cause the overvoltage protection circuitry to V+ activate (see Performance Specifi cations for overvoltage limits). Resistive Black Vin + Vout + Load C16 C8 C8 C8 C8 C8 C8 C7 inside a L3 L1 metal C17 container Temperature/power derating is based on maximum output current and voltage at the converter’s output pins. Use of the trim and sense functions can cause V- Vin - Vout - output voltages to increase, thereby increasing output power beyond the UWQ’s specifi ed rating, or cause output voltages to climb into the output overvoltage region. Therefore: (VOUT at pins) x (IOUT)  rated output power Figure 8. Conducted Emissions Test Circuit www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 27 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters The Trim pin (pin 6) is a relatively high impedance node that can be susceptible Contact and PCB resistance to noise pickup when connected to long conductors in noisy environments. losses due to IR drops +VOUT Trim Up* Trim Down* +VIN I OUT 49.6(VO – 1.226) 60.45 –10.2 –10.2 RT (kΩ) = RT (kΩ) = +SENSE UP DOWN VO – 12 12 – VO Sense Current ON/OFF TRIM LOAD *Vo = Desirable output voltage in Volts CONTROL Sense Return +VOUT −SENSE +VIN I OUT Return +SENSE –VIN -VOUT ON/OFF TRIM LOAD Contact and PCB resistance CONTROL RTRIM UP losses due to IR drops –SENSE Figure 11. Remote Sense Circuit Confi guration –VIN –VOUT Any long, distributed wiring and/or signifi cant inductance introduced into the Sense control loop can adversely affect overall system stability. If in doubt, test Figure 9. Trim Connections To Increase Output Voltages Using Fixed Resistors your applications by observing the converter’s output transient response during step loads. There should not be any appreciable ringing or oscillation. You may also adjust the output trim slightly to compensate for voltage loss in any +VOUT external fi lter elements. Do not exceed maximum power ratings. +VIN +SENSE ON/OFF TRIM LOAD CONTROL RTRIM DOWN –SENSE –VIN –VOUT Figure 10. Trim Connections To Decrease Output Voltages Using Fixed Resistors Remote Sense Input Use the Sense inputs with caution. Sense is normally connected at the load. Sense inputs compensate for output voltage inaccuracy delivered at the load. This is done by correcting IR voltage drops along the output wiring and the current carrying capacity of PC board etch. This output drop (the difference between Sense and Vout when measured at the converter) should not exceed 0.5V. Consider using heavier wire if this drop is excessive. Sense inputs also improve the stability of the converter and load system by optimizing the control loop phase margin. Note: The Sense input and power Vout lines are internally connected through low value resistors to their respective polarities so that the converter can operate without external connection to the Sense. Nevertheless, if the Sense function is not used for remote regulation, the user should connect +Sense to +Vout and –Sense to –Vout at the converter pins. The remote Sense lines carry very little current. They are also capacitively coupled to the output lines and therefore are in the feedback control loop to regulate and stabilize the output. As such, they are not low impedance inputs and must be treated with care in PC board layouts. Sense lines on the PCB should run adjacent to DC signals, preferably Ground. In cables and discrete wiring, use twisted pair, shielded tubing or similar techniques. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 28 of 29 UWQ-12/20-T48 Series Wide Input, Isolated DOSA Quarter Brick DC-DC Converters Vertical Wind Tunnel Murata Power Solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airfl ow and heat dissipation analysis of power products. IR Transparent The system includes a precision low fl ow-rate anemometer, optical window Variable variable speed fan, power supply input and load controls, Unit under speed fan temperature gauges, and adjustable heating element. test (UUT) The IR camera monitors the thermal performance of the IR Video Unit Under Test (UUT) under static steady-state conditions. A Camera special optical port is used which is transparent to infrared wavelengths. Both through-hole and surface mount converters are sol- dered down to a host carrier board for realistic heat absorp- tion and spreading. Both longitudinal and transverse airfl ow Heating studies are possible by rotation of this carrier board since element there are often signifi cant differences in the heat dissipation Precision in the two airfl ow directions. The combination of adjust- low-rate able airfl ow, adjustable ambient heat, and adjustable Input/ anemometer Output currents and voltages mean that a very wide range of 3” below UUT measurement conditions can be studied. The collimator reduces the amount of turbulence adjacent to Ambient the UUT by minimizing airfl ow turbulence. Such turbulence temperature infl uences the effective heat transfer characteristics and sensor gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly Airflow causing uneven overheating. collimator Both sides of the UUT are studied since there are different ther- mal gradients on each side. The adjustable heating element and fan, built-in temperature gauges, and no-contact IR camera mean that power supplies are tested in real-world conditions. Figure 12. Vertical Wind Tunnel Soldering Guidelines Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these specifi ca- tions may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C. Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 129 Flanders Road, Westborough, MA 01581 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UWQ-12/20-T48 Series.A03 Page 29 of 29