MURATA POWER SOLUTIONS ULS-12/5-D48N-C

ULS 60-Watt Series www.murata-ps.com Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FEATURES n Small footprint DC/DC converter, ideal for high current applications Typical unit n Tiny 0.9" x 1.3" x 0.40" open frame package n Industry standard DOSA "brick" format and pinout with surface mount option PRODUCT OVERVIEW n 36-75 Volts DC input range The world of “brick” DC/DC converters has seen minimum load is required. For systems requiring a steady size reduction. The ULS series makes controlled startup/shutdown, an external remote n 2250 Volt Basic input/output isolation another dramatic size shrink down to a “sixteenth- On/Off control may use a switch, transistor or digital (48V models) brick” width (0.9 inches) while still retaining up logic. Remote Sense inputs compensate for resis- n Up to 66 Watts total output power with to 66 Watt output and full 2250 Volt DC isolation. tive line drops at high currents. overtemperature shutdown The PC-board mount converter family accepts Many self-protection features on the ULS series 36 to 75 Volts DC inputs and delivers fixed outputs avoid both converter and external circuit hazards. n High efficiency synchronous rectifier forward regulated to within ±0.2%. The ULS converters These include input undervoltage lockout and topology are ideal for datacom and telecom applications, overtemperature shutdown. The outputs current n Stable no-load operation with no required cell phone towers, data centers, server farms and limit using the “hiccup” autorestart technique and external components network repeaters. the outputs may be short-circuited indefinitely. ULS outputs may be trimmed within ±10% of Additional features include output overvoltage and n Operating temperature range -40 to +85°C nominal output while delivering fast settling to reverse conduction elimination. with derating current step loads and no adverse effects from The synchronous rectifier forward topology yields n Certified to UL 60950-1, CSA-C22.2 No. 234, higher capacitive loads. Excellent ripple and noise high efficiency for minimal heat buildup and “no EN60950-1 safety approvals, 2nd Edition specifications assure compatibility to circuits using fan” operation. n Extensive self-protection shut down features CPU’s, ASIC’s, programmable logic and FPGA’s. No +SENSE (7) +Vin (1) +Vout (8) SWITCH CONTROL -Vout (4) -Vin (3) PULSE -SENSE TRANSFORMER INPUT (5) UNDER VOLTAGE, OVER TEMPERATURE, AND OUTPUT PWM OPTO REFERENCE OVER VOLTAGE Vout COMPARATORS CONTROLLER ISOLATION ERROR AMP TRIM (6) REMOTE ON/OFF CONTROL Typical topology is shown (2) Figure 1. Simplified Block Diagram For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_ULS Series.C06 Page 1 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters  PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input C76 Efficiency Package Root Model  R/N (mV pk-pk)  Regulation (max.)  Vout Iout Power Vin Nom. Range Iin, no load Iin, full (V) (A, max.) (W) (V) (V) (mA) load (A) Typ. Max. Line Load Min. Typ. Case (inches) ULS-3.3/20-D48N-C 3.3 20 66 70 120 ±0.1% ±0.2% 48 36-75 20 1.53 89% 90% 0.9x1.3x0.40 ULS-5/12-D48N-C 5 12 60 50 80 ±0.125% ±0.25% 48 36-75 40 1.39 88% 90% 0.9x1.3x0.40 ULS-12/5-D48N-C 12 5 60 80 120 ±0.125% ±0.25% 48 36-75 50 1.37 88% 91% 0.9x1.3x0.40  Please refer to the Part Number Structure when ordering. electrolytic.  These specifications are preliminary. Contact Murata Power Solutions for availability. I/O caps are necessary for our test equipment and may not be needed for your application.  ➃ Regulation specifications describe output voltage deviations from a nominal/midpoint value to either All specifications are at nominal line voltage and full load, +25°C unless otherwise noted. See extreme (50% load step). detailed specifications. Output capacitors are 1 μF ceramic multilayer in parallel with 10 μF ULS-3.3/20-D48P-C ULS-3.3/20-D48P-Y ULS-5/12-D48PH-Y ULS-12/5-D48P-Y ULS-12/5-D48PH-Y ULS-3.3/20-D48PH-C ULS-5/12-D48P-Y ULS-5/12-D48PL2-C ULS-12/5-D48P-C ULS-12/5-D48PL2-C ULS-3.3/20-D48PH-Y ULS-5/12-D48P-C ULS-5/12-D48PM-C ULS-12/5-D48PH-C ULS-12/5-D48PM-C ULS-3.3/20-D48PM-C ULS-5/12-D48PH-C PART NUMBER STRUCTURE ULS - 3.3 / 20 - D48 N M H Lx - C RoHS Hazardous Substance Compliance (does not claim EU RoHS exemption 7b–lead in solder) C = RoHS-6 Y = RoHS-5 Sixteenth Brick Series Pin Length Option (Thru-hole only) Blank = Standard pin length 0.180˝ (4.6mm) L1 = 0.110˝ (2.79mm) ➀ L2 = 0.145˝ (3.68mm) ➀ Nominal Output Voltage: Conformal Coating: Blank = No coating, standard H = Coating added, optional special order* (not available on SMT models) Maximum Rated Output Current SMT Version Current in Amps Blank = Through-hole mount, no SMT ➁ M = Surface mount (MSL = 3) Input Voltage Range: On/Off Control Logic: D48 = 36-75 Volts (48V nominal) N = Negative P = Positive ➀ Special quantity order is required; samples available with standard pin length only. ➁ SMT (M) versions not available in sample quantities. ➂ Some model number combinations may not be available. See website or contact your local Murata sales representative. Simplified Murata-PS logo Rev Product Label MODEL NAME As shown in figure 2, because of the small size of these products, the product labels contain a simplified Murata-PS logo and a character-reduced code to indicate the model Label 1 Figure 2. Label Artwork Layout number and manufacturing date code. Not all items on the label are always used. Please note that the label differs from the product photograph. REG.-Nr D216 . Serial # (4 digits) 0001 YYWW Date code Bar code: Data matrix Label 2 www.murata-ps.com/support MDC_ULS Series.C06 Page 2 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-3.3/20-D48 ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 80 Vdc Operating or non-operating, tested: Input Voltage, Transient 100 Vdc 100 mS max. duration Isolation Voltage Input to output 2250 Vdc Input Reverse Polarity None, install external fuse None Vdc On/Off Remote Control Power on, referred to -Vin 0 15 Vdc Output Power 0 66.66 W Current-limited, no damage, Output Current 0 20 A 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 Specifications Table is not implied or recommended. INPUT Operating voltage range 36 48 75 Vdc Recommended External Fuse Fast blow 4 A Start-up threshold, turn on Rising input voltage 33.5 34.5 35.5 Vdc 12 Falling input voltage 31.5 32.5 33.5 Vdc Undervoltage shutdown, turn off Overvoltage protection NA Vdc Reverse Polarity Protection None, install external fuse None Vdc Internal Filter Type Capacitive Input current Full Load Conditions Vin = nominal 1.53 1.56 A Low Line Vin = minimum 2.08 2.15 A Inrush Transient 0.05 A2-Sec. Output in Short Circuit 150 300 mA No Load input current Iout = minimum, unit=ON 30 100 mA Shut-Down Mode Input Current 5 15 mA Reflected (back) ripple current ➁ no filtering 150 210 mAp-p Reflected (back) ripple current ➁ Measured at input with specified filter 20 30 mAp-p GENERAL and SAFETY Efficiency Vin=48V, full load 89 90 % Vin=Min 86 88 % Isolation Isolation Voltage, input to output 2250 Vdc Insulation Safety Rating basic Isolation Resistance 100 MΩ Isolation Capacitance 1000 pF UL-60950-1, CSA-C22.2 No.60950-1, Safety (meets the following requirements) Yes IEC/EN60950-1, 2nd Edition Per MIL-HDBK-217F, ground benign, 3 Calculated MTBF TBD Hours x 10 Tambient=+40°C Per Telcordia SR332, issue 1, class 3, ground 3 3200 Hours x 10 Calculated MTBF ➃ fixed, Tambient=+40°C DYNAMIC CHARACTERISTICS 19 Fixed Switching Frequency 480 500 520 KHz Startup Time Power on, Vout regulated 5 15 mS Startup Time Remote ON to Vout regulated 5 10 mS 50-75-50% load step, settling time to within Dynamic Load Response 50 150 µSec 1% of Vout. Dynamic Load Peak Deviation same as above ±150 ±200 mV FEATURES and OPTIONS Remote On/Off Control “N” suffix: Negative Logic, ON state ON = Pin grounded or external voltage -0.1 0.8 V Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V Control Current open collector/drain 1 2 mA www.murata-ps.com/support MDC_ULS Series.C06 Page 3 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-3.3/20-D48 (CONT.) FEATURES and OPTIONS (cont.) Conditions ➀ Minimum Typical/Nominal Maximum Units Remote On/Off Control (cont.) “P” suffix: Positive Logic, ON state ON = Pin open or external voltage 3.5 15 V Positive Logic, OFF state OFF = Ground pin or external voltage 0 1 V Control Current open collector/drain 1 2 mA OUTPUT Total Output Power 0 66 66.66 W Voltage 15 Nominal Output Voltage ➂ No trim 3.267 3.3 3.333 Vdc Settling Accuracy At 50% load -1 1 % of Vset Output Voltage Range ➇ User-adjustable -10 10 Overvoltage Protection Via magnetic feedback 3.75 4.25 4.95 Vdc 18 Remote Sense Compensation Of Vset 10 % Current Output Current Range 0 20 20 A Minimum Load No minimum load 13 Current Limit Inception 98% of Vnom., cold condition 22 26 30 A Short Circuit ➄ Hiccup technique, autorecovery within ±1% Short Circuit Current 6.6 A of Vout Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Hiccup current limiting Regulation Line Regulation ➆ Vin=min. to max., Vout=nom., nom load ±0.1 V Load Regulation ➆ Iout=min. to max ±0.2 V Ripple and Noise 5 Hz- 20 MHz BW 70 120 mV pk-pk Temperature Coefficient At all outputs 0.02 % of Vout./°C Maximum Capacitive Loading Low ESR, .02 ohms max (resistive load) 1000 μF (10% ceramic, 90% Oscon) MECHANICAL (Through Hole Models) Outline Dimensions Cxx case 1.3x0.9x0.4 Inches (Please refer to outline drawing) WxLxH 33x22.9x10.2 mm Weight 0.58 Ounces 16.4 Grams Through Hole Pin Diameter .062 & .04 Inches 1.575 & 1.016 mm Gold-plated copper Through Hole Pin Material alloy with nickel underplate TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches Gold overplate 5 µ-inches ENVIRONMENTAL No derating, full power, 200 LFM, 11 Operating Ambient Temperature Range -40 85 °C no condensation Storage Temperature Vin = Zero (no power) -55 125 °C Operating Case Temp No derating required -40 120 °C Thermal Protection/Shutdown Measured at hotspot 110 115 120 °C Electromagnetic Interference External filter is required Conducted, EN55022/CISPR22 B Class Radiated, EN55022/CISPR22 B Class RoHS rating RoHS-6 www.murata-ps.com/support MDC_ULS Series.C06 Page 4 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-3.3/20-D48 Efficiency vs. Line Voltage and Load Current @ 25°C Maximum Current Temperature Derating at Sea Level (Vin = 48V, longitudinal airflow) 25 100 95 20 90 Natural convection 15 0.5 m/s (100 LFM) 85 1.0 m/s (200 LFM) VIN = 75V 80 10 1.5 m/s (300 LFM) VIN = 48V 2.0 m/s (400 LFM) 75 VIN = 36V 5 70 0 65 30 35 40 45 50 55 60 65 70 75 80 85 60 Ambient Temperature (ºC) 3 4 6 8 10 12 14 16 18 20 Load Current (Amps) (Resistive loads 50% with +25% step Vin=48V) Transient Response (Load from 75% to 50%) Transient Response (Load from 50% to 75%) Enable Start-up Enable Start-up (Vin=48V Iout=20A) Enable Start-up (Vin=48V Iout=0A) Ripple and Noise (1uF Ceramic and 10uF Tantalum Capcitors) www.murata-ps.com/support MDC_ULS Series.C06 Page 5 of 24 R/N Waveform (Vin=48V Iout=20A) R/N Waveform (Vin=48V Iout=0A) Efficiency (%) Output Current (Amps) (Resistive loads 50% with +25% step Vin=48V) Transient Response (Load from 75% to 50%) Transient Response (Load from 50% to 75%) Enable Start-up ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-3.3/20-D48 (CONT.) Enable Start-up (Vin=48V Iout=20A) Enable Start-up (Vin=48V Iout=0A) Ripple and Noise (1uF Ceramic and 10uF Tantalum Capcitors) R/N Waveform (Vin=48V Iout=20A) R/N Waveform (Vin=48V Iout=0A) www.murata-ps.com/support MDC_ULS Series.C06 Page 6 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-5/12-D48 ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 80 Vdc Operating or non-operating, tested: Input Voltage, Transient 100 Vdc 100 mS max. duration Isolation Voltage Input to output 2250 Vdc Input Reverse Polarity None, install external fuse None Vdc On/Off Remote Control Power on, referred to -Vin 0 15 Vdc Output Power 0 60.6 W Current-limited, no damage, Output Current 0 12 A 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 Specifications Table is not implied or recommended. INPUT Operating voltage range 36 48 75 Vdc Recommended External Fuse Fast blow 4 A Start-up threshold, turn on Rising input voltage 33 34.5 35.5 Vdc 12 Falling input voltage 31 32.5 33.5 Vdc Undervoltage shutdown, turn off Overvoltage protection NA Vdc Reverse Polarity Protection None, install external fuse None Vdc Internal Filter Type LC Input current Full Load Conditions Vin = nominal 1.39 1.43 A Low Line Vin = minimum 1.85 1.91 A Inrush Transient 0.05 A2-Sec. Output in Short Circuit 100 200 mA No Load input current Iout = minimum, unit=ON 40 80 mA Shut-Down Mode Input Current 5 10 mA Reflected (back) ripple current ➁ no filtering 400 500 mAp-p Reflected (back) ripple current ➁ Measured at input with specified filter 25 35 mAp-p GENERAL and SAFETY Efficiency Vin=48V, full load 88 90 % Vin=Min 88 90 % Isolation Isolation Voltage, input to output 2250 Vdc Insulation Safety Rating basic Isolation Resistance 10 MΩ Isolation Capacitance 1000 pF UL-60950-1, CSA-C22.2 No.60950-1, Safety (meets the following requirements) Yes IEC/EN60950-1, 2nd Edition Per MIL-HDBK-217F, ground benign, 3 Calculated MTBF TBD Hours x 10 Tambient=+40°C Per Telcordia SR332, issue 1, class 3, ground 3 3200 Hours x 10 Calculated MTBF ➃ fixed, Tambient=+40°C DYNAMIC CHARACTERISTICS Fixed Switching Frequency 19 400 KHz Startup Time Power on, Vout regulated 10 20 mS Startup Time Remote ON to Vout regulated 10 20 mS 50-75-50% load step, settling time to within Dynamic Load Response 50 100 µSec 1% of Vout. Dynamic Load Peak Deviation same as above ±200 ±250 mV FEATURES and OPTIONS Remote On/Off Control “N” suffix: Negative Logic, ON state ON = Pin grounded or external voltage -0.1 0.8 V Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V Control Current open collector/drain 1 2 mA www.murata-ps.com/support MDC_ULS Series.C06 Page 7 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-5/12-D48 (CONT.) FEATURES and OPTIONS (cont.) Conditions ➀ Minimum Typical/Nominal Maximum Units Remote On/Off Control (cont.) “P” suffix: Positive Logic, ON state ON = Pin open or external voltage 3.5 15 V Positive Logic, OFF state OFF = Ground pin or external voltage 0 1 V Control Current open collector/drain 1 2 mA OUTPUT Total Output Power 0 60 60.6 W Voltage 15 Nominal Output Voltage ➂ No trim 4.95 5 5.05 Vdc Settling Accuracy At 50% load -1 1 % of Vset Output Voltage Range ➇ User-adjustable -10 10 Overvoltage Protection Via magnetic feedback 6 6.5 7.2 Vdc 18 Remote Sense Compensation Of Vset 10 % Current Output Current Range 0 12 12 A Minimum Load No minimum load 13 Current Limit Inception 98% of Vnom., after warm up 14 16 19 A Short Circuit ➄ Hiccup technique, autorecovery within ±1% Short Circuit Current 0.5 1 A of Vout Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Hiccup current limiting Regulation Line Regulation ➆ Vin=min. to max., Vout=nom., nom load ±0.125 V Load Regulation ➆ Iout=min. to max ±0.25 V Ripple and Noise 5 Hz- 20 MHz BW 50 100 mV pk-pk Temperature Coefficient At all outputs 0.02 % of Vout./°C Maximum Capacitive Loading Low ESR, .02 ohms max (resistive load) 220 1000 μF (10% ceramic, 90% Oscon) MECHANICAL (Through Hole Models) Outline Dimensions Cxx case 1.3x0.9x0.4 Inches (Please refer to outline drawing) WxLxH 33x22.9x10.2 mm Weight 0.58 Ounces 16.4 Grams Through Hole Pin Diameter .062 & .04 Inches 1.575 & 1.016 mm Gold-plated copper Through Hole Pin Material alloy with nickel underplate TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches Gold overplate 5 µ-inches ENVIRONMENTAL No derating, full power, 200 LFM, 11 Operating Ambient Temperature Range -40 85 °C no condensation Storage Temperature Vin = Zero (no power) -55 125 °C Operating Case Temp No derating required -40 120 °C Thermal Protection/Shutdown Measured at hotspot 110 115 130 °C Electromagnetic Interference External filter is required Conducted, EN55022/CISPR22 A Class Radiated, EN55022/CISPR22 A Class RoHS rating RoHS-6 www.murata-ps.com/support MDC_ULS Series.C06 Page 8 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-5/12-D48 Efficiency and Power Dissipation @ 25°C Maximum Current Temperature Derating at Sea Level (Vin = 48V, airflow is from Vin to Vout) 13 100 12 95 11 12 90 10 Natural convection 85 9 11 VIN = 75V 80 8 VIN = 48V 10 75 7 VIN = 36V 70 6 9 65 5 8 60 4 Power Dissipation 55 3 (Vin = 48V) 7 50 2 30 35 40 45 50 55 60 65 70 75 80 85 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 Ambient Temperature (ºC) Load Current (Amps) Enable Start-up (Vin=48V, Iout=12A, Ta=+25°C) Trace 2=Output, Trace 4= Enable. Enable Start-up (Vin=48V, Iout=0A, Ta=+25°C) Trace 2=Output, Trace 4= Enable. Enable Start-up (Vin=48V, Iout=12A, Cload=1000uF, Ta=+25°C) Trace 2=Output, Trace 4= Enable. www.murata-ps.com/support MDC_ULS Series.C06 Page 9 of 24 Efficiency (%) Power Dissipation (Watts) Output Current (Amps) ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-5/12-D48 (CONT.) Output and Ripple Noise (Vin=48V, Iout=12A, 1uF Ceramic and 10uF tantalum capacitors) Output and Ripple Noise (Vin=48V, Iout=0A, 1uF Ceramic and 10uF tantalum capacitors) Transient Response (Vin=48V, Iout=50-75-50% of Imax) Transient Response (Vin=48V, Iout=50-75-50% of Imax) (Recovery time=9.6uS) (Recovery time=10uS) Transient Response (Vin=48V, Iout=50-75-50% of Imax) Thermal image with hot spot at full load with 85 °C ambient; air is flowing at 400LFM. Air if flowing across the converter from +V to -V at 48V input. Identifiable and recommended value to be verified in application. (Q2, max temp=120 °C/IPC9592 guidelines) www.murata-ps.com/support MDC_ULS Series.C06 Page 10 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-12/5-D48* ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 80 Vdc Operating or non-operating, tested: Input Voltage, Transient 100 Vdc 100 mS max. duration Isolation Voltage Input to output 2250 Vdc Input Reverse Polarity None, install external fuse None Vdc On/Off Remote Control Power on, referred to -Vin 0 15 Vdc Output Power 0 60.6 W Current-limited, no damage, Output Current 0 5 A 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 Specifications Table is not implied or recommended. INPUT Operating voltage range 36 48 75 Vdc Recommended External Fuse Fast blow 4 A Start-up threshold, turn on Rising input voltage 33 34.5 35.5 Vdc 12 Falling input voltage 31 32.5 33.5 Vdc Undervoltage shutdown, turn off Overvoltage protection NA Vdc Reverse Polarity Protection None, install external fuse None Vdc Internal Filter Type Capacitance Input current Full Load Conditions Vin = nominal 1.37 1.43 A Low Line Vin = minimum 1.83 1.89 A Inrush Transient 0.05 A2-Sec. Output in Short Circuit 100 200 mA No Load input current Iout = minimum, unit=ON 50 150 mA Shut-Down Mode Input Current (TH) 15 25 mA Shut-Down Mode Input Current (SMT) 15 20 mA Reflected (back) ripple current ➁ no filtering 150 200 mAp-p Measured at input with specified filter 15 30 mAp-p Reflected (back) ripple current ➁ GENERAL and SAFETY Efficiency Vin=48V, full load 88 91 % Vin=Min (TH) 89 90 % Vin=Min (SMT) 89 91.5 % Isolation Isolation Voltage, input to output 2250 Vdc Insulation Safety Rating basic Isolation Resistance 100 MΩ Isolation Capacitance (TH) 1000 pF Isolation Capacitance (SMT) 1500 pF UL-60950-1, CSA-C22.2 No.60950-1, Safety (meets the following requirements) Yes IEC/EN60950-1, 2nd Edition Per MIL-HDBK-217F, ground benign, 3 Calculated MTBF TBD Hours x 10 Tambient=+40°C Per Telcordia SR332, issue 1, class 3, ground 3 Calculated MTBF ➃ 3200 Hours x 10 fixed, Tambient=+40°C DYNAMIC CHARACTERISTICS 19 Fixed Switching Frequency 470 520 570 KHz Startup Time Power on, Vout regulated 30 mS Startup Time (TH) Remote ON to Vout regulated 30 mS Startup Time (SMT) Remote ON to Vout regulated 20 mS 50-75-50% load step, settling time to within Dynamic Load Response 25 50 µSec 1% of Vout. Dynamic Load Peak Deviation same as above ±180 ±240 mV *NOTE: The ULS-12/5-D48NM-C (SMT version) contains ceramic capacitors. No tantalum capacitors are used. www.murata-ps.com/support MDC_ULS Series.C06 Page 11 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, ULS-12/5-D48 (CONT.) FEATURES and OPTIONS Conditions ➀ Minimum Typical/Nominal Maximum Units Remote On/Off Control “N” suffix: Negative Logic, ON state ON = Pin grounded or external voltage -0.1 0.8 V Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V Control Current open collector/drain 1 2 mA “P” suffix: Positive Logic, ON state ON = Pin open or external voltage 3.5 15 V Positive Logic, OFF state OFF = Ground pin or external voltage 0 1 V Control Current open collector/drain 1 2 mA OUTPUT Total Output Power 0 60 60.6 W Voltage 15 No trim 11.88 12 12.12 Vdc Nominal Output Voltage ➂ 18 Settling Accuracy At 50% load -1 1 % of Vset Output Voltage Range (TH) ➇ User-adjustable -10 10 User-adjustable -15 10 Output Voltage Range (SMT) ➇ Overvoltage Protection Via magnetic feedback 13.3 14.5 18 Vdc Remote Sense Compensation Of Vset 10 % Current Output Current Range 0 5 5 A Minimum Load No minimum load 13 Current Limit Inception 98% of Vnom., after warm up 5.5 6.8 8 A Short Circuit ➄ Hiccup technique, autorecovery within ±1% Short Circuit Current 0.6 A of Vout Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Hiccup current limiting Regulation Vin=min. to max., Vout=nom., nom load ±0.125 V Line Regulation ➆ Load Regulation ➆ Iout=min. to max ±0.25 V Ripple and Noise 5 Hz- 20 MHz BW 80 120 mV pk-pk Temperature Coefficient At all outputs 0.02 % of Vout./°C Maximum Capacitive Loading Low ESR, .02 ohms max (resistive load) 1000 μF (10% ceramic, 90% Oscon) Maximum Capacitive Loading loads: CC mode μF MECHANICAL (Through Hole Models) Outline Dimensions Cxx case 1.3x0.9x0.4 Inches (Please refer to outline drawing) WxLxH 33x22.9x10.2 mm Weight 0.58 Ounces 16.4 Grams Through Hole Pin Diameter .062 & .04 Inches 1.575 & 1.016 mm Gold-plated copper Through Hole Pin Material alloy with nickel underplate TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches Gold overplate 5 µ-inches ENVIRONMENTAL No derating, full power, 200 LFM, 11 Operating Ambient Temperature Range -40 85 °C no condensation Storage Temperature Vin = Zero (no power) -55 125 °C Operating Case Temp No derating required -40 105 °C Thermal Protection/Shutdown Measured at hotspot 115 125 130 °C Electromagnetic Interference External filter is required Conducted, EN55022/CISPR22 B Class Radiated, EN55022/CISPR22 B Class RoHS rating RoHS-6 www.murata-ps.com/support MDC_ULS Series.C06 Page 12 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters Performance Specification Notes ➀ All specifications are typical unless noted. Ambient temperature = ➇ Do not exceed maximum power ratings, Sense limits or output overvoltage +25°Celsius, Vin is nominal, output current is maximum rated nominal. when adjusting output trim values. External output capacitance is 1 µF multilayer ceramic paralleled with ➈ At zero output current, Vout may contain components which slightly 10 µF electrolytic. All caps are low ESR. These capacitors are necessary for exceed the ripple and noise specifications. our test equipment and may not be needed in your application. ➉ Output overload protection is non-latching. When the output overload Testing must be kept short enough that the converter does not appreciably is removed, the output will automatically recover. heat up during testing. For extended testing, use plenty of airflow. See Derating Curves for temperature performance. All models are stable and 11 All models are fully operational and meet published specifications, regulate within spec without external cacacitance. including “cold start” at –40°C. ➁ Input Ripple Current is tested and specified over a 5-20 MHz bandwidth 12 The converter will shut off if the input falls below the undervoltage thresh- and uses a special set of external filters only for the Ripple Current speci- old. It will not restart until the input exceeds the Input Start Up Voltage. fications. Input filtering is Cin = 33 µF, Cbus = 220 µF, Lbus = 12 µH. Use 13 Short circuit shutdown begins when the output voltage degrades approxi- capacitor rated voltages which are twice the maximum expected voltage. mately 2% from the selected setting. Capacitors must accept high speed AC switching currents. 14 Output noise may be further reduced by installing an external filter. See ➂ Note that Maximum Current Derating Curves indicate an average current the Application Notes. Use only as much output filtering as needed and no at nominal input voltage. At higher temperatures and/or lower airflow, the more. Larger caps (especially low-ESR ceramic types) may slow transient converter will tolerate brief full current outputs if the average RMS current response or degrade dynamic performance. Thoroughly test your applica- over time does not exceed the Derating curve. All Derating curves are tion with all components installed. presented at sea level altitude. Be aware of reduced power dissipation 15 To avoid damage or unplanned shutdown, do not sink appreciable reverse with increasing density altitude. output current. ➃ Mean Time Before Failure (MTBF) is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Oper- 16 If reverse polarity is accidentally applied to the input, always connect an external fast blow input fuse in series with the +Vin input. ating temperature = +30°C, full output load, natural air convection. 17 Although extremely unlikely, failure of the internal components of this ➄ The output may be shorted to ground indefinitely with no damage. The Output Short Circuit Current shown in the specifications is an average con- product may expose external application circuits to dangerous voltages, currents, temperatures or power levels. Please thoroughly verify all appli- sisting of very short bursts of full rated current to test whether the output circuit can be repowered. cations before committing them to service. Be sure to include appropri- ately rated FUSES (see specifications and Application Notes) to reduce the ➅ The On/Off Control is normally driven from a switch or relay. An open risk of failure. collector/open drain transistor may be used in saturation and cut-off 18 (pinch-off) modes. External logic may also be used if voltage levels are If Sense is not wired to an external load, connect sense pins to their respective Vout pins. Do not leave sense unconnected. fully compliant to the specifications. 19 All models use fixed switching frequencies. ➆ Regulation specifications describe the deviation as the input line voltage or output load current is varied from a nominal midpoint value to either extreme (50% load). www.murata-ps.com/support MDC_ULS Series.C06 Page 13 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-12/5-D48 Efficiency and Power Dissipation vs. Line Voltage and Load Current @ 25°C Maximum Current Temperature Derating at Sea Level (Vin = 48V, airflow is from Vin to Vout) 6 100 12 95 11 5 90 10 85 9 4 Natural convection 80 8 0.5 m/s (100 LFM) VIN = 75V 3 7 1.0 m/s (200 LFM) 75 VIN = 48V 1.5 m/s (300 LFM) 70 6 VIN = 36V 2 2.0 m/s (400 LFM) 65 5 1 60 4 Power Dissipation 55 3 (Vin = 48V) 0 50 2 30 35 40 45 50 55 60 65 70 75 80 85 0.50 0.95 1.40 1.85 2.30 2.75 3.20 3.65 4.10 4.55 5.00 Ambient Temperature (ºC) Load Current (Amps) Enable Start-up (Vin=48V, Iout=5A, Ta=+25°C) Trace 2=Output, Trace 4= Enable. Enable Start-up (Vin=48V, Iout=0A, Ta=+25°C) Trace 2=Output, Trace 4= Enable. Enable Start-up (Vin=48V, Iout=5A, Cload=1000uF Ta=+25°C) Trace 2=Output, Trace 4= Enable. www.murata-ps.com/support MDC_ULS Series.C06 Page 14 of 24 Efficiency (%) Loss (Watts) Output Current (Amps) ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TYPICAL PERFORMANCE DATA, ULS-12/5-D48 (CONT.) Output and Ripple Noise (Vin=48V, Iout=0A, 1uF Ceramic and 10uF tantalum capacitors) Output and Ripple Noise (Vin=48V, Iout=5A, 1uF Ceramic and 10uF tantalum capacitors) Transient Response (Vin=48V, Iout=50-75-50% of Imax) Transient Response (Vin=48V, Iout=50-75-50% of Imax) (Delta=170mv, Recovery time=16uS) (-Delta=183.12mV, Recovery time=18.2uS) Transient Response (Vin=48V, Iout=50-75-50% of Imax) Thermal image with hot spot at full load with 85 °C ambient; air is flowing at 400LFM. Air if flowing across the converter from -V to +V at 48V input. Identifiable and recommended value to be verified in application. (Q2, max temp=120 °C/IPC9592 guidelines) www.murata-ps.com/support MDC_ULS Series.C06 Page 15 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters MECHANICAL SPECIFICATIONS, THROUGH-HOLE MOUNT TOP VIEW INPUT/OUTPUT CONNECTIONS P75 Pin Function Pin Function 3 -Vin 4 -Vout 5 –Sense In 2 On/Off Control 6 Trim 7 +Sense In 1 +Vin 8 +Vout Important! Always connect the sense pins. If they are not connected to a remote load, wire each sense pin to its respective voltage output at the converter pins. The 0.145-inch pin length is shown. Please refer to the part number structure for alternate pin lengths. SIDE VIEW Pin material: Copper alloy. Plating: Gold over nickel Please note that some competitive units may use PINS 1-3,5-7: different pin numbering or alternate outline views; φ0.040±0.001(1.016±0.025) 1.100 (27.9) PINS 4,8: however, all units are plugin-compatible. φ0.062±0.001(1.575±0.025) 0.078 ±0.005 6X 0.100 ±0.005 2X It is recommended that no parts be placed beneath the converter BOTTOM PIN VIEW 1.30 (33.0) END VIEW Dimensions are in inches (mm) shown for ref. only. 3 4 Third Angle Projection 5 2 6 7 Tolerances (unless otherwise specified): 8 1 .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ RECOMMENDED FOOTPRINT (VIEW THROUGH CONVERTER) Components are shown for reference only and may vary between units. TOP VIEW FINISHED HOLE SIZES @ PINS 1-3, 6, 5, 7 (PRI) (SEC) (PER IPC-D-275, LEVEL C) 1.100 .048-.062 [27.94] 3.81 .150 8 1 11.7 7 7.62 .46 2 .300 22.9 6 C C L L .90 5 7.62 .300 3 4 3.81 .150 14.0 .100 MIN .55 ANNULAR RING C L FINISHED HOLE SIZES FOR ALL PIN @ PINS 4 & 8 SHOULDERS 33 (PER IPC-D-275, LEVEL C) .070-.084 1.30 www.murata-ps.com/support MDC_ULS Series.C06 Page 16 of 24 0.030 (0.8) Min 0.600 (15.24) 0.300 (7.62) 0.136 ±0.005 0.600 (15.24) 0.145 0.400 (10.16) Max 0.90 (22.9) (3.68) R0.31 (8.00) 12.6 (320) ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT Anti-static foam Corner spacer 2 cartons per box Each tray is 4 x 8 units (32 units total per tray) 128 units per carton Label 256 units total per box Corrugated cardboard box All materials in contact with the units are anti-static protective. Dimensions are in inches (mm). Label SHIPPING TRAY DIMENSIONS Material: Low density, closed cell polyethylene anti-static foam 9.84 0.87 (250.00) (22.00) 0.59 4-C 0.26 (15.00) (6.5) Dimensions are in milimeters. Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.5 0.51 1.34 1.97 0.31 .XXX ± 0.25 (13.00) Angles ± 2˚ (34.00) (50.00) (8.00) www.murata-ps.com/support MDC_ULS Series.C06 Page 17 of 24 128 units 128 units 13.79 (350) 11.42 (290) 9.84 (250.00) 0.47 (12.00) 0.91 0.24 (23.00) (6.00) ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL = 3) TOP VIEW INPUT/OUTPUT CONNECTIONS P75 Pin Function Pin Function 3 -Vin 4 -Vout 5 –Sense In 2 On/Off Control 6 Trim 7 +Sense In 1 +Vin 8 +Vout Important! Always connect the sense pins. If they are not connected to a remote load, wire each sense pin to its respective voltage output at the converter pins. Pin material: Copper alloy. Plating: Gold over nickel SIDE VIEW Please note that some competitive units may use different pin numbering or alternate outline views; 0.062 however, all units are plugin-compatible. (1.575) It is recommended that no parts be placed beneath 1.100 (27.9) the converter BOTTOM PIN VIEW 1.30 (33.0) END VIEW Dimensions are in inches (mm) shown for ref. only. 3 4 Third Angle Projection 5 2 6 7 Tolerances (unless otherwise specified): 8 1 .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ RECOMMENDED FOOTPRINT Components are shown for reference only and may vary between units. (VIEW THROUGH CONVERTER) TOP VIEW (PRI) (SEC) 27.94 3.81 1.100 .150 8 1 11.7 7 7.62 .46 .300 2 22.9 6 C C L L .90 5 7.62 .300 3 4 3.81 .150 14.0 .55 .070 MIN PAD C L (6 OR 8 PLACES AS REQUIRED) 33 1.30 www.murata-ps.com/support MDC_ULS Series.C06 Page 18 of 24 0.600 (15.24) 0.020 (0.5) Min 0.150 (3.8) 0.300 (7.62) 0.600 (15.24) 0.400 (10.16) Max 0.90 (22.9) ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TAPE AND REEL INFORMATION Feed (Unwind) [2.0] 6-8mm Direction ---- 0.079 PICK-UP NOZZLE Pin #1 Round 1.75 Holes .069 [18.92] 0.745 44.00 1.732 32.00 Oblong 1.260 Holes PITCH Top Cover Tape [9.65] .38 REF 330.20 13.00 TAPE AND REEL (200 UNITS PER REEL) 101.60 13.00 4.00 .512 44.0 CORE 1.73 Dimensions are in inches (mm shown for ref. only). REF Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 1˚ Components are shown for reference only. www.murata-ps.com/support MDC_ULS Series.C06 Page 19 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters TECHNICAL NOTES Input Fusing highly inductive source impedances. The input circuit shown in Figure 3 is a practical solution that can be used to minimize the effects of inductance in the Certain applications and/or safety agencies may require the installation of input traces. For optimum performance, components should be mounted close fuses at the inputs of power conversion components. Fuses should also be to the DC/DC converter. used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exists. For DATEL ULS series DC/DC converters, we recommend the I/O Filtering, Input Ripple Current, and Output Noise use of a fast blow fuse, installed in the ungrounded input supply line with a All models in the ULS Series are tested/specified for input reflected ripple typical value about twice the maximum input current, calculated at low line current and output noise using the specified external input/output components/ with the converter’s minimum efficiency. circuits and layout as shown in the following two figures. External input capaci- All relevant national and international safety standards and regulations must tors (CIN in Figure 3) serve primarily as energy-storage elements, minimiz- be observed by the installer. For system safety agency approvals, the convert- ing line voltage variations caused by transient IR drops in conductors from ers must be installed in compliance with the requirements of the end- use backplane to the DC/DC. Input caps should be selected for bulk capacitance safety standard. (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The Input Reverse-Polarity Protection switching nature of DC/DC converters requires that dc voltage sources have If the input voltage polarity is accidentally reversed, an internal diode will low ac impedance as highly inductive source impedance can affect system sta- bility. In Figure 3, CBUS and LBUS simulate a typical dc voltage bus. Your specific become forward biased and likely draw excessive current from the power source. If this source is not current limited or the circuit appropriately fused, it system configuration may necessitate additional considerations. could cause permanent damage to the converter. TO CURRENT OSCILLOSCOPE Pre-Bias Protection PROBE +VIN For applications where a pre-bias potential can be present at the output of the LBUS power module it is recommended that either blocking diodes are added in series + with the Vout power lines or, a preferred solution is to use an OR-ing FET control- VIN CBUS CIN – ler like the LM5050-1 High-Side & LM5051 Low-Side OR-ing FET Controller from TI. Starting the module into a pre-bias condition can cause permanent damage –VIN to the module. CIN = 33µF, ESR < 700mΩ @ 100kHz Input Under-Voltage Shutdown and Start-Up Threshold CBUS = 220µF, ESR < 100mΩ @ 100kHz LBUS = 12µH Under normal start-up conditions, devices will not begin to regulate properly Figure 3. Measuring Input Ripple Current until the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once operating, devices will not turn off until the input voltage drops below the In critical applications, output ripple/noise (also referred to as periodic and Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input random deviations or PARD) may be reduced below specified limits using filter- is brought back up to the Start-Up Threshold. This built in hysteresis prevents ing techniques, the simplest of which is the installation of additional external any unstable on/off situations from occurring at a single input voltage. output capacitors. They function as true filter elements and should be selected for bulk capacitance, low ESR and appropriate frequency response. Start-Up Time All external capacitors should have appropriate voltage ratings and be The VIN to VOUT Start-Up Time is the time interval between the point at which located as close to the converter as possible. Temperature variations for all the ramping input voltage crosses the Start-Up Threshold and the fully loaded relevant parameters should also be taken carefully into consideration. The most output voltage enters and remains within its specified accuracy band. Actual effective combination of external I/O capacitors will be a function of line voltage measured times will vary with input source impedance, external input capaci- and source impedance, as well as particular load and layout conditions. tance, and the slew rate and final value of the input voltage as it appears at the converter. The ULS Series implements a soft start circuit to limit the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. +SENSE The On/Off Control to VOUT start-up time assumes the converter has its +VOUT nominal input voltage applied but is turned off via the On/Off Control pin. The specification defines the interval between the point at which the converter is RLOAD SCOPE C1 C2 turned on (released) and the fully loaded output voltage enters and remains within its specified accuracy band. Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up time is also governed by the internal soft start circuitry –VOUT and external load capacitance. The difference in start up time from VIN to VOUT –SENSE and from On/Off Control to VOUT is therefore insignificant. C1 = 1µF Input Source Impedance C2 = 10µF The input of ULS converters must be driven from a low ac-impedance source. LOAD 2-3 INCHES (51-76mm) FROM MODULE The DC/DC’s performance and stability can be compromised by the use of Figure 4. Measuring Output Ripple/Noise (PARD) www.murata-ps.com/support MDC_ULS Series.C06 Page 20 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters Floating Outputs Remote Sense Since these are isolated DC/DC converters, their outputs are “floating” with Note: The Sense and VOUT lines are internally connected through low-value respect to their input. Designers will normally use the –Output as the ground/ resistors. Nevertheless, if the sense function is not used for remote regulation return of the load circuit. You can however, use the +Output as ground/return to the user should connect the +Sense to +VOUT and –Sense to –VOUT at the DC/ effectively reverse the output polarity. DC converter pins. ULS series converters employ a sense feature to provide point of use regulation, thereby overcoming moderate IR drops in PCB conduc- Minimum Output Loading Requirements tors or cabling. The remote sense lines carry very little current and therefore ULS converters employ a synchronous-rectifier design topology and all models require minimal cross-sectional-area conductors. The sense lines, which are regulate within spec and are stable under no-load to full load conditions. capacitively coupled to their respective output lines, are used by the feedback Operation under no-load conditions however might slightly increase the output control-loop to regulate the output. As such, they are not low impedance points ripple and noise. and must be treated with care in layouts and cabling. Sense lines on a PCB should be run adjacent to dc signals, preferably ground. Thermal Shutdown [VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] ≤ 10%VOUT The ULS converters are equipped with thermal-shutdown circuitry. If environ- mental conditions cause the temperature of the DC/DC converter to rise above In cables and discrete wiring applications, twisted pair or other techniques the designed operating temperature, a precision temperature sensor will power should be used. Output over-voltage protection is monitored at the output volt- down the unit. When the internal temperature decreases below the threshold age pin, not the Sense pin. Therefore, excessive voltage differences between of the temperature sensor, the unit will self start. See Performance/Functional VOUT and Sense in conjunction with trim adjustment of the output voltage can Specifications. cause the over-voltage protection circuitry to activate (see Performance Speci- fications for over-voltage limits). Power derating is based on maximum output Output Over-Voltage Protection current and voltage at the converter’s output pins. Use of trim and sense func- The ULS output voltage is monitored for an over-voltage condition using a com- tions can cause output voltages to increase, thereby increasing output power parator. The signal is optically coupled to the primary side and if the output volt- beyond the converter’s specified rating, or cause output voltages to climb into age rises to a level which could be damaging to the load, the sensing circuitry the output over-voltage region. Therefore, the designer must ensure: will power down the PWM controller causing the output voltage to decrease. (VOUT at pins) x (IOUT) ≤ rated output power Following a time-out period the PWM will restart, causing the output voltage to ramp to its appropriate value. If the fault condition persists, and the output Contact and PCB resistance voltage again climbs to excessive levels, the over-voltage circuitry will initiate losses due to IR drops another shutdown cycle. This on/off cycling is referred to as “hiccup” mode. +VOUT +VIN Current Limiting IOUT As soon as the output current increases to approximately 130% of its rated +SENSE value, the DC/DC converter will go into a current-limiting mode. In this condi- Sense Current tion, the output voltage will decrease proportionately with increases in output ON/OFF TRIM LOAD current, thereby maintaining somewhat constant power dissipation. This is CONTROL commonly referred to as power limiting. Current limit inception is defined Sense Return as the point at which the full-power output voltage falls below the specified –SENSE tolerance. See Performance/Functional Specifications. If the load current, being IOUT Return drawn from the converter, is significant enough, the unit will go into a short –VIN –VOUT circuit condition as described below. Contact and PCB resistance Short Circuit Condition losses due to IR drops Figure 5. Remote Sense Circuit Configuration When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low, the mag- On/Off Control netically coupled voltage used to develop primary side voltages will also drop, The input-side, remote On/Off Control function can be ordered to operate with thereby shutting down the PWM controller. Following a time-out period, the either logic type: PWM will restart causing the output voltage to begin ramping to their appropri- Positive ("P" suffix) logic models are enabled when the on/off pin is left ate value. If the short-circuit condition persists, another shutdown cycle will be open (or is pulled high, applying +3.5V to +15V with respect to –Input) as per initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling Figure 6. Positive-logic devices are disabled when the on/off pin is pulled low reduces the average output current, thereby preventing internal temperatures (0 to 1V with respect to –Input). from rising to excessive levels. The ULS Series is capable of enduring an indefi- Negative (“N” suffix) logic devices are off when pin is left open (or pulled nite short circuit output condition. high, applying +2.5V to +15V), and on when pin is pulled low (–0.1 to +0.8V) with respect to –Input as shown in Figure 6. www.murata-ps.com/support MDC_ULS Series.C06 Page 21 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters Dynamic control of the remote on/off function is best accomplished with a +VIN mechanical relay or an open-collector/open-drain drive circuit (optically isolated +Vcc if appropriate). The drive circuit should be able to sink appropriate current (see 13V CIRCUIT Performance Specifications) when activated and withstand appropriate voltage when deactivated. Applying an external voltage to pin 2 when no input power is O N /O F F applied to the converter can cause permanent damage to the converter. C O N TR O L 5V CIRCUIT –VIN Figure 6. Driving the Negative Logic On/Off Control Pin (simplified circuit) OUTPUT VOLTAGE ADJUSTMENT Trim Equations +VOUT +VIN Trim Down 511 RT (kΩ) = – 10.22 DOWN +SENSE Δ% VNOM – VDES Where Δ% = |( × 100 )| ON/OFF TRIM LOAD VNOM CONTROL RTRIM UP Trim Up –SENSE 5.11 × VNOM × (100 + Δ%) 511 – 10.22 RT (kΩ) = – –VIN UP –VOUT 1.225 × Δ% Δ% Figure 7. Trim Connections To Increase Output Voltages Note: “Δ%” is always a positive value. “VNOM” is the nominal, rated output voltage. Connect sense to its respective Vout pin if sense is not used with a remote load. “VDES” is the desired, changed output voltage. +VOUT +VIN +SENSE RTRIM DOWN ON/OFF TRIM LOAD CONTROL –SENSE –VIN –VOUT Figure 8. Trim Connections To Decrease Output Voltages www.murata-ps.com/support MDC_ULS Series.C06 Page 22 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters Trimming by Using an External Voltage Source 1. The easiest way to trim the output using an external voltage source is to +VOUT +VIN drive the Trim pin directly from a variable source. The following equation can be used to calculate the voltage at the Trim pin. External +SENSE Vo is the output voltage you want; Vonominal is the nominal output voltage; source + Vo ON/OFF TRIM LOAD Vtrim = 2 x 1.225 x − 1.225 – CONTROL Vonominal –SENSE Vtrim is the voltage that should appear at the trim pin. 2. If the purpose of trimming is to compensate voltage drop of power path –VIN –VOUT from converter to the Load, you may separately connect the sense pin directly to the load. It’s much easier than real time adjusting trim voltage. 3. CAUTION: To avoid unplanned power down cycles, do not exceed EITHER Figure 9. Trimming with an External Source the maximum output voltage OR the maximum output power when setting the trim. If the output voltage is excessive, the OVP circuit may shut down the converter. If the maximum power is exceeded, the converter may enter current limiting. If the power is exceeded for an extended period, the converter may overheat and encounter overtemperature shut down. Be careful of external electrical noise. The Trim input is a sensitive input to the converter’s feedback control loop. Excessive electrical noise may cause instability or oscillation. Through-hole Soldering Guidelines SMT Reflow Soldering Guidelines Murata Power Solutions recommends the TH soldering specifications below when install- The surface-mount reflow solder profile shown below is suitable for SAC305 type lead- ing these converters. These specifications vary depending on the solder type. Exceeding free solders. This graph should be used only as a guideline. Many other factors influence these specifications may cause damage to the product. Your production environment may the success of SMT reflow soldering. Since your production environment may differ, please thoroughly review these guidelines with your process engineers. 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: Maximum Preheat Temperature 115° C. Maximum Pot Temperature 270° C. Maximum Solder Dwell Time 7 seconds For Sn/Pb based solders: Maximum Preheat Temperature 105° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_ULS Series.C06 Page 23 of 24 ULS 60-Watt Series Sixteenth-brick DOSA-Compatible, Isolated DC/DC Converters Vertical Wind Tunnel Murata Power Solutions employs a computer controlled cus- tom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airflow and heat dissipation analysis of power products. The system includes a precision low flow-rate anemometer, variable IR Transparent speed fan, power supply input and load controls, temperature optical window Variable gauges, and adjustable heating element. Unit under speed fan The IR camera monitors the thermal performance of the test (UUT) Unit Under Test (UUT) under static steady-state conditions. A IR Video special optical port is used which is transparent to infrared Camera 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 airflow studies are possible by rotation of this carrier board since there are often significant differences in the heat dissipation Heating in the two airflow directions. The combination of adjustable element Precision airflow, adjustable ambient heat, and adjustable Input/Output low-rate currents and voltages mean that a very wide range of mea- anemometer surement conditions can be studied. 3” below UUT The collimator reduces the amount of turbulence adjacent to the UUT by minimizing airflow turbulence. Such turbulence influences the effective heat transfer characteristics and gives Ambient false readings. Excess turbulence removes more heat from temperature some surfaces and less heat from others, possibly causing sensor uneven overheating. Both sides of the UUT are studied since there are differ- Airflow ent thermal gradients on each side. The adjustable heating collimator element and fan, built-in temperature gauges, and no-contact IR camera mean that power supplies are tested in real-world condi- tions. Figure 10. Vertical Wind Tunnel 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. Specifications are subject to change without notice. © 20 18 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_ULS Series.C06 Page 24 of 24