MURATA POWER SOLUTIONS UVQ-24/4.5-D48PB

UVQ Series www.murata-ps.com Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters PRODUCT OVERVIEW For efficient, fully isolated DC power in the small- A convenient remote On/Off control input oper- est space, Murata Power Solutions' UVQ series ates by external digital logic, relay or transistor quarter bricks offer output voltages from 1.5 input. To compensate for longer wiring and to to 48 Volts with currents up to 40 Amps. UVQs retain output voltage accuracy at the load, UVQs operate over a wide temperature range (up to include a Sense input to dynamically correct for +70°C at 200 lfm airflow) at full-rated power. The ohmic losses. A trim input may be connected to a optional mounting baseplate extends this to all user’s adjustment potentiometer or trim resis- practical temperature ranges at full power. tors for output voltage calibration closer than the UVQs achieve these impressive specifications standard accuracy. while delivering excellent electrical performance. UVQs include industry-standard safety certifica- Typical unit Overall noise is 35mVp-p (3.3V models) with fast tions and BASIC I/O insulation provides 2250 Volt step response (down to 50µsec). These convert- input/output isolation. Radiation emission testing FEATURES ers offer high stability even with no load and is performed to widely-accepted EMC standards. tight output regulation. The unit is fully protected The UVQs may be considered as higher perfor- „„ Standard quarter-brick package/pinout against input over and undervoltage, output over- mance replacements for some Murata Power „„ Outputs from 1.5 to 48V up to 125W current and short circuit. An on-board temperature Solutions USQ models. „„ Low profile 0.42" height sensor shuts down the converter if thermal limits are reached. Protection uses the “hiccup” (auto „„ 24 and 48Vdc nominal inputs restart) method. „„ Fully isolated, 2250Vdc (BASIC) insulation „„ Designed for RoHS-6 compliance „„ Output overvoltage/short-circuit protected „„ On/Off control, trim and sense functions „„ High efficiency to 92% „„ Protected against temp. and voltage limits „„ Designed to meet UL/IEC/EN60950-1 safety approvals +SENSE (7) +VOUT +VIN (1) (8) Baseplate (9) SWITCH Optional CONTROL –VOUT (4) –VIN (3) –SENSE (5) PWM OPTO REFERENCE & CONTROLLER ISOLATION ERROR AMP VOUT TRIM (6) INPUT UNDERVOLTAGE, INPUT OVERVOLTAGE, AND OUTPUT OVERVOLTAGE COMPARATORS * Can be ordered with positive (standard) or negative (optional) polarity. REMOTE ON/OFF CONTROL* Typical configuration — some models use a different topology (2) For full details go to www.murata-ps.com/rohs Figure 1. Simplified Schematic www.murata-ps.com/support MDC_UVQ Models.F06 Page 1 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input Package R/N (mVp-p) Regulation (Max.) ➂ Efficiency) Vout Iout Power Vin Nom. Range Iin, No Load Iin, Full Load (Case, Root Models (Volts) (Amps) (Watts) Typ. Max. Line Load (Volts) (Volts) (mA) (Amps) Min. Typ. Pinout) UVQ-1.5/40-D24P-C 1.5 40 60 30 60 ±0.075% ±0.05% 24 18-36 80 2.84 86.5% 88% UVQ-2.5/35-D24P-C 35 87.5 60 ±0.05% ±0.05% 24 18-36 100 4.14 86% 88% 2.5 UVQ-2.5/40-D48N-C 40 100 60 ±0.05% ±0.05% 48 36-75 100 2.37 87% 88% 35 UVQ-3.3/30-D24P-C ➁ 30 99 65 ±0.1% ±0.25% 24 18-36 180 4.58 88.5% 90% 3.3 UVQ-3.3/35-D48N-C ➁ 35 115.5 40 ±0.05% ±0.25% 48 36-75 130 2.7 87% 89% UVQ-5/20-D24P-C 30 50 ±0.05% ±0.05% 24 18-36 190 4.53 91% 92% 5 20 100 UVQ-5/20-D48N-C 20 25 ±0.05% ±0.05% 48 36-75 80 2.31 88.5% 90% UVQ-12/8-D24P-C 8 96 95 130 ±0.1% ±0.1% 24 18-36 90 4.4 89% 91% 12 UVQ-12/10-D48N-C 10 120 110 160 ±0.075% ±0.05% 48 36-75 60 2.78 88.5% 90% C59, P32 UVQ-15/7-D24P-C 85 150 ±0.05% ±0.05% 24 18-36 103 4.85 88.5% 90.3% 15 7 105 UVQ-15/7-D48N-C 120 150 ±0.05% ±0.02% 48 36-75 60 2.39 90% 91.5% UVQ-18/5.6-D24P-C 5.6 100.8 125 185 ±0.05% ±0.075% 24 18-36 140 4.69 88% 89.5% 18 UVQ-18/6-D48N-C 6 125 185 ±0.05% ±0.075% 48 36-75 80 2.5 88.3% 90% UVQ-24/4.5-D24P-C 108 60 100 ±0.075% ±0.15% 24 18-36 45 5.03 88% 89.5% 24 4.5 UVQ-24/4.5-D48N-C 75 130 ±0.075% ±0.25% 48 36-75 45 2.49 89% 90.5% UVQ-48/2.5-D24P-C 100 200 ±0.1% ±0.2% 24 18-36 45 4.4 89% 91% 48 2.5 120 UVQ-48/2.5-D48N-C 250 375 ±0.175% ±0.2% 48 36-75 30 2.71 91% 92.3%  These are partial model numbers. Please refer to the full model number struc- Output capacitors are 1uF ceramic || 10 uF electrolytic. Input cap is 22 uF, low ture for complete ordering part numbers. ESR, except UVQ-24/4.5 is 33uF and UVQ-48/2.5 uses no input cap. I/O caps are necessary for our test equipment and may not be needed for your application.  Min. Iout = 3 Amps for UVQ-3.3 Vout models.  Iout = 14 Amps max. with Vin = 18-19.5 Volts.  All specifications are at nominal line voltage and full load, +25°C unless other- wise noted. See detailed specifications. UVQ-12/10-D48NB-C UVQ-15/7-D48NB-C UVQ-18/6-D48P-C UVQ-12/10-D48N-C UVQ-15/7-D48N-C UVQ-5/20-D24NB-C UVQ-12/10-D48PB-C UVQ-15/7-D48PB-C UVQ-5/20-D24N-C UVQ-12/10-D48P-C UVQ-15/7-D48P-C UVQ-5/20-D48NB-C UVQ-12/10-D48PL2-C UVQ-18/6-D48NB-C UVQ-5/20-D48N-C UVQ-15/7-D48NB9-C UVQ-18/6-D48N-C UVQ-5/20-D48PB-C UVQ-15/7-D48NB9L2-C UVQ-18/6-D48PB-C UVQ-5/20-D48P-C Model UVQ-31128-C is a standard model UVQ-5/20-D48NB-C with modified rise time to reach 4.75V within 10 mSec. All other specifications are as per the standard product. UVQ Pin 9 Baseplate Connection The UVQ series may include an optional installed baseplate for extended UVQ-12/10-D48 thermal management. Various UVQ models (see list below) are also available UVQ-1.5/40-D24 with an additional pin 9 on special order which connects to the baseplate but is Models which are NOT available with Pin 9: electrically isolated from the rest of the converter. Please refer to the mechani- UVQ-5/20-D24 and –D48 cal drawings. UVQ-3.3/30-D24 Pin 9 offers a positive method of controlling the electrical potential of the UVQ-3.3/35-D48 baseplate, independent of the converter. Some baseplate models cannot UVQ-2.5/35-D24 include pin 9 and in such cases, the baseplate is grounded by the mounting UVQ-2.5/40-D48 bolts. Or consider adding an external lugged washer with a grounding terminal. Other models which are not listed will be reviewed for future pin 9 accomo- The baseplate may be ordered by adding a “B” to the model number tree dation. and pin 9 will be pre-installed by adding a “9”. The two options are separate. Please refer to the Ordering Guide. Do not order pin 9 without the baseplate. Note that “pin 9” converters may be on limited forecast, requiring minimum order quantities and scheduled deliveries. Models available with Pin 9: www.murata-ps.com/support MDC_UVQ Models.F06 Page 2 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters PART NUMBER STRUCTURE U VQ - 3.3 20 D48 N B 9 LX C / - - RoHS-6 hazardous substance compliant (does not claim EU RoHS exemption 7b–lead in solder) Output Configuration U = Unipolar/Single Alternate Pin Length: (special quantity order) Blank = Standard pin length L1 = 0.110 (2.79mm) Quarter-Brick Package L2 = 0.145 (3.68mm) Nominal Output Voltage Baseplate Pin 9, see Mechanical Drawings: (special order) 1.2 to 48 Volts Blank = No pin 9, standard 9 = Pin 9 installed (see description on pg. 2), optional Maximum Rated Output Current in Amps Blank = No baseplate, standard B = Baseplate installed, optional special order Input Voltage Range: * Note: D24 = 18-36 Volts (24V nominal) Remote On/Off Control Logic: Some model number combinations may not be D48 = 36-75 Volts (48V nominal) Add "P" for positive logic available. Contact Murata Power Solutions. Add "N" for negative logic Positive "P" logic is standard for D24 models and optional special order for D48 models. Negative "N" logic is standard for D48 models and optional special order for D24 models. ORDERING GUIDE SUMMARY Model Vout Range Iout Range Vin Range Efficiency All Models 1.2V to 48V 2.5A to 40A 18-36V or 36-75V Up to 92.%, model dependent INPUT CHARACTERISTICS Parameter Typ. @ 25°C, full load Notes Voltage Range 18-36 or 36-75 Volts 24V or 48V nominal Current, full power Up to 5.6 Amps Model dependent Isolation 2kVdc to 2250V Model dependent Remote On/Off Control Switch or FET control Positive or negative logic OUTPUT CHARACTERISTICS Parameter Typ. @ 25°C, full load Notes Voltage 1.5 to 48 Volts ±10% Trimmable Current 2.5 to 40 Amps fullscale No minimum load Accuracy Down to 1% of VNOM Most models Ripple & Noise (to 20MHz) Down to 35mVp-p Model dependent Line and Load Regulation Down to ±0.125%/±0.25% Model dependent Overcurrent Protection 150% of IOUT max. With hiccup auto-restart Overtemperature Protection +125°C Efficiency (minimum) See Performance Specifications GENERAL SPECIFICATIONS Parameter Typ. @ 25°C, full load Notes Dynamic Load Response Down to 50μsec Model dependent Operating Temperature Range –40 to +110°C With baseplate, see derating curve Safety UL/IEC/EN 60950-1 and CSA C22.2-No.234 MECHANICAL CHARACTERISTICS With baseplate 1.45 x 2.30 x 0.5 inches (36.83 x 58.42 x 12.7 mm) Without baseplate 1.45 x 2.30 x 0.42 inches (36.83 x 58.42 x 10.67 mm) See Performance Specifications, page 2 www.murata-ps.com/support MDC_UVQ Models.F06 Page 3 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 24V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Input Input voltage range See ordering guide Start-up threshold, (V) min. 17 17 17 17 17 17 17 17 17 Undervoltage 16 16.25 16 16.25 16 16 14 shutdown, (V) Overvoltage shutdown (V) none 39 none Reflected (back) ripple 10-50 mA pk-pk, model dependent 2 current Input Current Full load conditions See ordering guide. 2 Inrush transient, (A sec) 0.5 0.5 0.05 0.5 0.1 1 1 0.05 0.05 Output short circuit, (mA) 40 50 10 320 50 50 50 No load, mA 80 100 180 190 90 103 140 45 30 Low line (Vin = min.), 3.79 5.49 6.04 5.57 5.93 6.52 6.29 6.67 3.60 (Amps) Standby mode, 1-4mA, model dependent (Off, UV, OT shutdown) Internal input filter type L-C Pi-type L-C Reverse polarity See notes. protection 5 Remote On/Off Control Positive logic, "P" suffix OFF = Ground pin to +0.8V (specifications are max) ON = Open or +5V to +Vin max. Negative logic, "N" suffix OFF = Open or +5V to +Vin max (specifications are max) ON = Ground pin to+0.8V max Current 1-8 mA, model dependent www.murata-ps.com/support MDC_UVQ Models.F06 Page 4 of 25 UVQ-1.5/40-D24 UVQ-2.5/35-D24 UVQ-3.3/30-D24 UVQ-5/20-D24 UVQ-12/8-D24 UVQ-15/7-D24 UVQ-18/5.6-D24 UVQ-24/4.5-D24 UVQ-48/2.5-D24 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 24V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Output Voltage output range See ordering guide. Voltage output accuracy ±1.5% of Vnom ±1.25% of Vnom ±1% of Vnom (50% load) Adjustment range –20 to +10% of Vnom. ±10% of Vnom. Temperature coefficient ±0.02% of Vout range per °C Minimum loading No minimum load 3 amps No minimum load Remote sense +10%. compensation Ripple/noise See ordering guide. Line/Load regulation See ordering guide. Efficiency See ordering guide. Maximum capacitive loading, Low ESR 10,000 5000 4700 2200 <0.02Ω max., resistive load, (μF) Current limit inception (98% of Vout, after 45 44 36 24 10 9.5 7.2 5.8 3.4 warmup), (Amps) Short circuit protection Current limiting, hiccup autorestart. Remove overload for recovery. method Short circuit current, 3.6 3 3 3 1.5 15 mA 3 5 2.8 (Amps) Short circuit duration Output may be shorted continuously to ground (no damage). Overvoltage protection, (via 14.4 Volts 2.3 Volts 3 Volts max 4 Volts max 6.8 Volts max 18.5 Volts 22 Volts max 29 Volts max 59 Volts max magnetic feedback) max Isolation Characteristics Isolation Voltage Input to Output, (Volts min) 2000 Input to baseplate 1500 Baseplate to output, 1500 1000 1500 (Volts min) Isolation resistance 100 MΩ Isolation capacitance, (pF) 1500 1000 2000 1000-1500 Isolation safety rating Basic insulation www.murata-ps.com/support MDC_UVQ Models.F06 Page 5 of 25 UVQ-1.5/40-D24 UVQ-2.5/35-D24 UVQ-3.3/30-D24 UVQ-5/20-D24 UVQ-12/8-D24 UVQ-15/7-D24 UVQ-18/5.6-D24 UVQ-24/4.5-D24 UVQ-48/2.5-D24 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 24V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Dynamic characteristics 100 µSec to 150 µSec to 150 µSec to 100 µSec to 50 µSec 40 µSec to 50 µSec to 100 µSec 100 µSec Dynamic load response ±1% ±1.5% ±1.5% ±1.5% of final to ±1% ±1.25% ±1% to ±1% to ±1% (50-75-50% load step) of final value of final value of final value value of final value of final value of final value of final value of final value Start-up time Vin to Vout regulated, mSec 90msec 50msec 50msec 200msec 40msec 30msec 30msec 290msec 100msec Remote On/Off to Vout regulated, mSec 90msec 50msec 50msec 200msec 30msec 25msec 35msec 200msec 100msec Switching frequency, (KHz) 380 ± 30 500 to 650 600 360 290 ± 30 242 240 ± 25 290 ± 30 250 ± 25 Environmental 4 Calculated MTBF TBD Operating temperature range: see Derating −40 to +85°C (with Derating, see Note 15.) Curves. Operating temperature, with baseplate, no −40 to +110 −40 to +115 −40 to +110 3 derating required (°C) Storage temperature (°C) −55 to +130 −55 to +125 Thermal protection/ +110 to 125°C, model dependent shutdown Relative humidity To +85°C/85%, non-condensing Physical Outline dimensions See mechanical specs. Baseplate material Aluminum Pin material Copper alloy Pin diameter 0.040/0.062 inches (1.016/1.575 mm) 1.55 ounce Weight 1 ounce (28 grams) (44 grams) Electromagnetic interference (conducted and Designed to meet FCC part 15, class B, EN55022 radiated) (external filter required) Safety Designed to meet UL/cUL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1 www.murata-ps.com/support MDC_UVQ Models.F06 Page 6 of 25 UVQ-1.5/40-D24 UVQ-2.5/35-D24 UVQ-3.3/30-D24 UVQ-5/20-D24 UVQ-12/8-D24 UVQ-15/7-D24 UVQ-18/5.6-D24 UVQ-24/4.5-D24 UVQ-48/2.5-D24 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 48V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Input Input voltage range See ordering guide Start-up threshold, min (V) 35 34.5 34 34.5 35 Undervoltage 33.5 32 33.5 14 shutdown, (V) Overvoltage shutdown (V) none Reflected (back) ripple 10-50 mA pk-pk, model dependent current Input Current Full load conditions See ordering guide. 2 Inrush transient, (A sec) 0.05 0.05 1 1 0.05 1 0.05 0.05 Output short circuit, (mA) 50 10 30 50 250 50 No load, mA 100 130 80 60 30 80 45 30 Low line (Vin = min.), 3.15 3.56 3.07 3.72 3.21 3.35 3.30 3.60 (Amps) Standby mode, 1-4mA, model dependent (Off, UV, OT shutdown) Internal input filter type L-C Pi-type L-C Reverse polarity See notes. protection 5 Remote On/Off Control Positive logic, "P" suffix OFF = Ground pin to +0.8V (specifications are max) ON = Open or +5V to +Vin max Negative logic, "N" suffix OFF = Open or +5V to +Vin max (specifications are max) ON = Ground pin to+0.8V max Current 1-8 mA, model dependent www.murata-ps.com/support MDC_UVQ Models.F06 Page 7 of 25 UVQ-2.5/40-D48 UVQ-3.3/35-D48 UVQ-5/20-D48 UVQ-12/10-D48 UVQ-15/7-D48 UVQ-18/6-D48 UVQ-24/4.5-D48 UVQ-48/2.5-D48 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 48V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Output Voltage output range See ordering guide. Voltage output accuracy ±1.5% of Vnom ±1.25% of Vnom ±1% of Vnom (50% load) Adjustment range –20 to +10% of Vnom. +10% of Vnom. Temperature coefficient ±0.02% of Vout range per °C No minimum No minimum Minimum loading 3 Amps No minimum load load load Remote sense +10%. compensation Ripple/noise See ordering guide. Line/Load regulation See ordering guide. Efficiency See ordering guide. Maximum capacitive loading, Low ESR 10,000 4700 2200 1000 <0.02Ω max., resistive load, (μF) Current limit inception (98% of Vout, after 46 48 26 12.5 8.5 7 6.5 3.3 warmup), (Amps) Short circuit protection Current limiting, hiccup autorestart. Remove overload for recovery. method Short circuit current, 5 0.1 1.5 3 3 3 3.5 (Amps) Short circuit duration Output may be shorted continuously to ground (no damage). Overvoltage protection, (via 3 Volts max 4 Volts max 6 Volts max 14.4 Volts max 18.5 Volts max 22 Volts max 29 Volts max 55 Volts max magnetic feedback) Isolation Characteristics Isolation Voltage Input to Output, (Volts min) 2250 Input to baseplate 1500 Baseplate to output, 1500 1500 (Volts min) Isolation resistance 100 MΩ Isolation capacitance, (pF) 1500 1000 50 50 1500 Isolation safety rating Basic insulation www.murata-ps.com/support MDC_UVQ Models.F06 Page 8 of 25 UVQ-2.5/40-D48 UVQ-3.3/35-D48 UVQ-5/20-D48 UVQ-12/10-D48 UVQ-15/7-D48 UVQ-18/6-D48 UVQ-24/4.5-D48 UVQ-48/2.5-D48 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Performance/Functional Specifications 48V Models Typical @ Ta = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1) Dynamic characteristics 150 µSec to 150 µSec to 90 µSec 100 µSec 75 µSec Dynamic load response 50 µSec to ±1% 50 µSec to ±1% 50 µSec to ±1% ±1.5% ±1.5% to ±2% to ±1% to ±1% (50-75-50% load step) of final value of final value of final value of final value of final value of final value of final value of final value Start-up time Vin to Vout regulated, mSec 50msec 50msec 50msec 40msec 30msec 30msec 100msec 50msec Remote On/Off to Vout regulated, mSec 50msec 50msec 50msec 30msec 30msec 30msec 100msec 50msec Switching frequency, (KHz) 600 600 450 ± 50 290 ± 30 245 ± 20 240 ± 25 290 ± 30 540 ± 40 Environmental 4 Calculated MTBF TBD Operating temperature range: see Derating −40 to +85°C (with Derating, see Note 15.) Curves. Operating temperature, with baseplate, no −40 to +110 −40 to +115 −40 to +110 −40 to +110 −40 to +120 3 derating required (°C) Storage temperature (°C) −55 to +125 Thermal protection/ +110 to 125°C, model dependent shutdown Relative humidity To +85°C/85%, non-condensing Physical Outline dimensions See mechanical specs. Baseplate material Aluminum Pin material Copper alloy Pin diameter 0.040/0.062 inches (1.016/1.575 mm) Weight 1 ounce (28 grams) Electromagnetic interference (conducted and Designed to meet FCC part 15, class B, EN55022 radiated) (external filter required) Safety Designed to meet UL/cUL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1 www.murata-ps.com/support MDC_UVQ Models.F06 Page 9 of 25 UVQ-2.5/40-D48 UVQ-3.3/35-D48 UVQ-5/20-D48 UVQ-12/10-D48 UVQ-15/7-D48 UVQ-18/6-D48 UVQ-24/4.5-D48 UVQ-48/2.5-D48 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-1.5/40-D24N: Maximum Current Temperature Derating UVQ-1.5/40-D24N: Maximum Current Temperature Derating (No baseplate, VIN = 24V, transverse air flow) (With baseplate, VIN = 24V, transverse air flow) 40 40 39 39 Natural convection Natural convection 38 38 100 lfm 37 37 200 lfm 100 lfm 36 200 lfm 36 400 lfm 400 lfm 35 35 34 34 33 33 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) UVQ-2.5/40-D48 UVQ-2.5/40-D48N Power Dissipation vs. Load Current @ 25°C Efficiency vs. Line Voltage and Load Current @ 25°C 16 92 14 88 12 84 VIN = 48V 10 80 8 76 VIN = 36V 6 72 VIN = 48V 4 68 VIN = 75V 2 64 0 62 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 Load Current (Amps) Load Current (Amps) UVQ-3.3/30-D24N: Maximum Current Temperature Derating UVQ-3.3/30-D24N: Maximum Current Temperature Derating (No baseplate, VIN = 24V, transverse air flow at sea level) (With baseplate, VIN = 24V, transverse air flow at sea level) 30 30 29 29 28 28 27 Natural convection Natural convection 26 27 25 100 lfm 100 lfm 26 24 200 lfm 200 lfm 23 25 22 300 lfm 300 lfm 24 21 400 lfm 400 lfm 20 23 19 22 18 17 21 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UVQ Models.F06 Page 10 of 25 Output Current (Amps) Output Current (Amps) Efficiency (%) Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-3.3/35-D48 Maximum Current Temperature Derating UVQ-5/20-D24P (With baseplate, VIN = 48V, transverse air flow at sea level) Efficiency vs. Line Voltage and Load Current @ +25°C 36 94 34 93 32 92 30 91 VIN = 18V 28 90 Natural Convection VIN = 24V 26 89 100 lfm 24 VIN = 30V 88 200 lfm 22 87 VIN = 36V 300 lfm 20 400 lfm 86 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 85 Ambient Temperature (°C) 84 5 6.5 8 9.5 11 12.5 14 15.5 17 18.5 20 Load Current (Amps) UVQ-5/20-D24 Power Dissipation vs. Load Current @ +25°C 10 9 8 7 6 5 4 VIN = 18V VIN = 24V 3 VIN = 30V 2 VIN = 36V 1 5 6.5 8 9.5 11 12.5 14 15.5 17 18.5 20 Load Current (Amps) UVQ-5/20-D24P: Maximum Current Temperature Derating UVQ-5/20-D24PB: Maximum Current Temperature Derating (No baseplate, VIN = 24V, transverse air flow) (With baseplate, VIN = 24V, transverse air flow) 20 20 19.5 19.5 19 19 18.5 18 18.5 Natural convection 17.5 18 100 lfm 17 200 lfm 17.5 Natural convection 16.5 300 lfm 100 lfm 16 17 200 lfm 400 lfm 300 lfm 15.5 16.5 400 lfm 15 16 14.5 14 15.5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UVQ Models.F06 Page 11 of 25 Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) Output Current (Amps) Efficiency (%) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-5/20-D48P: Maximum Current Temperature Derating UVQ-5/20-D48 (No baseplate, VIN = 48V, transverse air flow at sea level) Efficiency vs. Line Voltage and Load Current @ 25°C 21 92 20 88 19 84 18 100 lfm 17 80 200 lfm 16 76 300 lfm VIN = 36V 15 400 lfm 72 14 VIN = 48V Natural convection 13 68 VIN = 75V 12 64 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) 62 0 2 4 6 8 10 12 14 16 18 20 Load Current (Amps) UVQ-5/20-D48PB: Maximum Current Temperature Derating UVQ-12/8-D24P (With baseplate, VIN = 48V, transverse air flow at sea level) Efficiency vs. Line Voltage and Load Current @ +25°C 21 95 20 19 90 18 VIN = 18V 17 100 lfm 85 VIN = 24V 200 lfm 16 300 lfm VIN = 30V 15 80 400 lfm VIN = 36V 14 13 75 20 25 30 35 40 45 50 55 60 65 70 75 80 85 0.8 1.6 2.4 3.2 4 4.8 5.6 6.4 7.2 8 Ambient Temperature (°C) Load Current (Amps) UVQ-12/8-D24P: Maximum Current Temperature Derating UVQ-12/10-D48N (No baseplate, VIN = 24V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ +25°C 8.0 92 7.8 90 7.6 88 VIN = 36V 7.4 100 lfm 86 VIN = 48V 200 lfm 300 lfm 7.2 VIN = 60V 84 7.0 VIN = 75V 82 6.8 80 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) 78 1 2 3 4 5 6 7 8 9 10 Load Current (Amps) www.murata-ps.com/support MDC_UVQ Models.F06 Page 12 of 25 Output Current (Amps) Output Current (Amps) Efficiency (%) Output Current (Amps) Efficiency (%) Efficiency (%) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-12/10-D48N: Maximum Current Temperature Derating UVQ-12/10-D48N (No baseplate, VIN = 48V, transverse air flow) Power Dissipation vs. Load Current @ +25°C 10 15 13 9 11 VIN = 75V 8 9 VIN = 60V VIN = 48V 7 7 VIN = 36V Natural convection 5 100 lfm 200 lfm 6 300 lfm 3 400 lfm 1 5 1 2 3 4 5 6 7 8 9 10 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Load Current (Amps) Ambient Temperature (°C) UVQ-12/10-D48N: Maximum Current Temperature Derating UVQ-15/7-D24N (With baseplate, VIN = 48V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ +25°C 10.0 94 9.5 92 9.0 90 8.5 88 VIN = 18V 8.0 VIN = 24V 86 7.5 Natural convection VIN = 30V 84 100 lfm 7.0 200 lfm VIN = 36V 300 lfm 82 400 lfm 6.5 80 6.0 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Load Current (Amps) Ambient Temperature (°C) UVQ-15/7-D24N: Maximum Current Temperature Derating UVQ-15/7-D24N (No baseplate, VIN = 24V, transverse air flow) Power Dissipation vs. Load Current @ +25°C 7.5 13 7 11 6.5 9 VIN = 36V 6 VIN = 30V 7 VIN = 24V 5.5 VIN = 18V Natural convection 5 100 lfm 5 200 lfm 300 lfm 3 400 lfm 4.5 1 4 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7 Load Current (Amps) Ambient Temperature (°C) www.murata-ps.com/support MDC_UVQ Models.F06 Page 13 of 25 Output Current (Amps) Power Dissipation (Watts) Power Dissipation (Watts) Output Current (Amps) Output Current (Amps) Efficiency (%) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-15/7-D24N: Maximum Current Temperature Derating UVQ-15/7-D48N (With baseplate, VIN = 24V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ +25°C 7.5 94 92 7 90 6.5 88 86 VIN = 36V 6 Natural convection 84 VIN = 48V 100 lfm 5.5 200 lfm 82 VIN = 60V 300 lfm 5 400 lfm 80 VIN = 75V 78 4.5 76 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7 4 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Load Current (Amps) Ambient Temperature (°C) UVQ-15/7-D48N: Maximum Current Temperature Derating UVQ-15/7-D48N (No baseplate, VIN = 48V, transverse air flow) Power Dissipation vs. Load Current @ +25°C 11 7.0 6.8 10 6.6 9 6.4 6.2 8 VIN = 75V 6.0 VIN = 60V 7 5.8 VIN = 48V 5.6 6 VIN = 36V 5.4 5 5.2 Natural convection 5.0 4 100 lfm 200 lfm 4.8 3 300 lfm 4.6 400 lfm 2 4.4 4.2 1 4.0 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Load Current (Amps) Ambient Temperature (°C) UVQ-15/7-D48N: Maximum Current Temperature Derating UVQ-18/5.6-D24 (With baseplate, VIN = 48V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ 25°C 92 7.0 6.8 90 6.6 6.4 88 6.2 6.0 86 5.8 84 5.6 Natural convection VIN = 18V 100 lfm 5.4 82 200 lfm 5.2 VIN = 24V 300 lfm 5.0 80 4.8 VIN = 36V 4.6 78 4.4 76 4.2 0.56 1.12 1.68 2.24 2.8 3.36 3.92 4.48 5.04 5.6 4.0 Load Current (Amps) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) www.murata-ps.com/support MDC_UVQ Models.F06 Page 14 of 25 Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) Output Current (Amps) Efficiency (%) Efficiency (%) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-18/5.6-D24: Maximum Current Temperature Derating UVQ-18/5.6-D24: Maximum Current Temperature Derating (No baseplate, VIN = 24V, transverse air flow) (With baseplate, VIN = 24V, transverse air flow) 5.8 5.8 5.6 5.6 5.4 200 lfm 5.4 5.2 5.2 5 300 lfm 4.8 5 100 lfm 400 lfm Natural 4.6 100 lfm Convection 4.8 4.4 200 lfm 4.6 4.2 300 lfm 4 Natural 4.4 400 lfm Convection 3.8 4.2 3.6 4 3.4 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) UVQ-18/6-D48 UVQ-18/6-D48N Power Dissipation vs. Load Current @ 25°C Efficiency vs. Line Voltage and Load Current @ 25°C 16 95 14 90 VIN = 75V 12 85 VIN = 48V 10 VIN = 36V 80 8 VIN = 36V 75 6 VIN = 48V 70 4 VIN = 75V 65 2 0 60 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6 Load Current (Amps) Load Current (Amps) UVQ-18/6-D48: Maximum Current Temperature Derating UVQ-18/6-D48: Maximum Current Temperature Derating (No baseplate, VIN = 48V, transverse air flow) (With baseplate, VIN = 48V, transverse air flow) 6.5 6.5 6 6 5.5 5.5 5 5 100 lfm 100 lfm 200 lfm 4.5 200 lfm 4.5 300 lfm 300 lfm 500 lfm 4 500 lfm 4 3.5 3.5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UVQ Models.F06 Page 15 of 25 Output Current (Amps) Output Current (Amps) Efficiency (%) Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-24/4.5-D24N Efficiency vs. Line Voltage and Load Current @ +25°C 91 90 89 88 87 VIN = 18V 86 85 VIN = 24V 84 VIN = 30V 83 VIN = 36V 82 81 80 1.00 1.35 1.70 2.05 2.40 2.75 3.10 3.45 3.80 4.15 4.50 Load Current (Amps) UVQ-24/4.5-D24P: Maximum Current Temperature Derating UVQ-24/4.5-D24P: Maximum Current Temperature Derating (No baseplate, Vin= 24V, air flow is from Pin 1 to Pin 3) (With baseplate, Vin= 24V, air flow is from Pin 1 to Pin 3) 4.50 4.50 4.25 4.25 4.00 4.00 400 LFM 3.75 3.75 300 LFM 400 LFM 200 LFM 300 LFM 3.50 3.50 100 LFM 200 LFM LOW LFM 100 LFM 3.25 3.25 LOW LFM 3.00 3.00 2.75 2.75 2.50 2.50 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) UVQ-24/4.5-D48N: Maximum Current Temperature Derating UVQ-24/4.5-D48N (No baseplate, VIN = 48V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ +25°C 92 4.5 90 88 4.3 86 400 lfm VIN = 36V 84 300 lfm VIN = 48V 4.0 82 200 lfm 80 VIN = 60V 100 lfm 78 VIN = 75V 3.8 76 74 3.5 72 70 3.3 68 66 3.0 64 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 1.00 1.35 1.70 2.05 2.40 2.75 3.10 3.45 3.80 4.15 4.50 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com/support MDC_UVQ Models.F06 Page 16 of 25 Efficiency (%) Output Current (Amps) Efficiency (%) Output Current (Amps) Output Current (Amps) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters TYPICAL PERFORMANCE DATA UVQ-48/2.5-D48N: Maximum Current Temperature Derating UVQ-48/2.5-D48N (With baseplate, VIN = 48V, transverse air flow) Efficiency vs. Line Voltage and Load Current @ 25°C 2.6 93 2.5 92 2.4 91 Natural convection 2.3 100 lfm 90 VIN = 36V 89 2.2 200 lfm VIN = 48V 88 2.1 VIN = 60V 87 2.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 VIN = 75V 86 Ambient Temperature (°C) 85 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 Load Current (Amps) www.murata-ps.com/support MDC_UVQ Models.F06 Page 17 of 25 Efficiency (%) Output Current (Amps) UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters MECHANICAL SPECIFICATIONS Case C59 Case C59 with Baseplate 2.30 (58.4) 1.860 (47.2) A A 0.42 (10.7) 1.030 1.45 (26.2) (36.8) PINS 1-3, 5-7: 0.040 ±0.002 (1.016 ±0.05) 0.188 PINS 4 & 8: 0.062 ±0.002 (1.575 ±0.05) (4.78) 2.00 (50.8) A #M3-THREAD X 0.15 DEEP BASEPLATE TYPICAL (4) PLACES 3 4 0.600 5 (15.24) 1.45 6 4 EQ. SP. 2 (36.8) 0.50 @ 0.150 7 (12.7) (3.81) 8 1 PINS 1-3, 5-7: 0.040 ±0.002 (1.016 ±0.05) 0.188 PINS 4 & 8: 0.062 ±0.002 (1.575 ±0.05) BOTTOM VIEW (4.8) Alternate pin lengths are available. Contact Murata Power Solutions. 2.30 (58.4) A 2.00 (50.8) A Optional baseplate pin is special order. Contact Murata Power Solutions.. 0.15 (3.81) 3 4 9 5 0.600 (15.24) Optional pin 9 connects 6 4 EQ. SP. to baseplate. Electrically 2 @ 0.150 (3.81) isolated from converter. 7 8 1 BOTTOM VIEW Dimensions are in inches (mm shown for ref. only). DOSA-Compliant I/O Connections Third Angle Projection Important: If sense inputs are not Pin Function P32 connected to a remote load, connect 1 +Vin them to their respective Vout pins at 2 On/Off Control the converter. 3 –Vin 4 –Vout Tolerances (unless otherwise specified): 5 –Sense .XX ± 0.02 (0.5) 6 Trim .XXX ± 0.010 (0.25) Angles ± 2˚ 7 +Sense 8 +Vout Components are shown for reference only. www.murata-ps.com/support MDC_UVQ Models.F06 Page 18 of 25 B B B B B UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters ABSOLUTE MAXIMUM RATINGS TECHNICAL NOTES Removal of Soldered UVQs from Printed Circuit Boards Input Voltage 24V models 48V models Should removal of the UVQ from its soldered connection be needed, thoroughly Continuous 0 to +36V 0 to +75V de-solder the pins using solder wicks or de-soldering tools. At no time should Transient (100 mS) +50V +100V any prying or leverage be used to remove boards that have not been properly On/Off Control –0.3 V min to +13.5V max. de-soldered first. Input Reverse Polarity Protection See Fuse section Input Source Impedance Output Overvoltage Vout +20% max. UVQ converters must be driven from a low ac-impedance input source. The Output Current (Note 7) Current-limited. Devices can withstand DC-DC’s performance and stability can be compromised by the use of highly sustained short circuit without damage. inductive source impedances. The input circuit shown in Figure 2 is a practical Storage Temperature –55 to +125°C solution that can be used to minimize the effects of inductance in the input Lead Temperature See soldering guidelines traces. For optimum performance, components should be mounted close to the DC-DC converter. Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper I/O Filtering, Input Ripple Current, and Output Noise operation under conditions other than those listed in the Performance/Func- All models in the UVQ Series are tested/specified for input ripple current (also tional Specifications Table is not implied nor recommended. called input reflected ripple current) and output noise using the circuits and layout shown in Figures 2 and 3. (1) All models are tested and specified with 200 LFM airflow, external 1||10µF ceramic/ tantalum output capacitors. External input capacitance varies according to model type. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equipment and may not be required to achieve specified performance in your TO applications. All models are stable and regulate within spec under no-load conditions. CURRENT OSCILLOSCOPE General conditions for Specifications are +25°C, Vin =nominal, Vout = nominal, full load. PROBE 1 +VIN (2) Input Ripple Current is tested and specified over a 5-20MHz bandwidth. Input filter- LBUS ing is Cin = 33µF tantalum, Cbus = 220µF electrolytic, Lbus = 12µH. + (3) Note that Maximum Power Derating curves indicate an average current at nominal VIN CBUS CIN input voltage. At higher temperatures and/or lower airflow, the DC-DC converter will – tolerate brief full current outputs if the total RMS current over time does not exceed 3 –VIN the Derating curve. (4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, CIN = 33µF, ESR < 700mΩ @ 100kHz Case 3, ground fixed conditions, TPCBOARD = +25°C, full output load, natural air CBUS = 220µF, ESR < 100mΩ @ 100kHz convection. LBUS = 12µH (5) The On/Off Control may be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. The On/Off Control Input Figure 2. Measuring Input Ripple Current should use either an open collector/open drain transistor or logic gate which does not exceed +13.5V. (6) Short circuit shutdown begins when the output voltage degrades approximately 2% External input capacitors (CIN in Figure 2) serve primarily as energy-storage from the selected setting. (7) The outputs are not intended to sink appreciable reverse current. elements. They should be selected for bulk capacitance (at appropriate fre- (8) Output noise may be further reduced by adding an external filter. See I/O Filtering quencies), low ESR, and high rms-ripple-current ratings. The switching nature and Noise Reduction. of DC-DC converters requires that dc voltage sources have low ac impedance (9) All models are fully operational and meet published specifications, including “cold as highly inductive source impedance can affect system stability. In Figure 2, start” at –40°C. CBUS and LBUS simulate a typical dc voltage bus. Your specific system configura- (10) Regulation specifications describe the deviation as the line input voltage or output tion may necessitate additional considerations. load current is varied from a nominal midpoint value to either extreme. (11) Overvoltage shutdown on 48V input models is not supplied in order to comply with telecom reliability requirements. These requirements attempt continued operation despite significant input overvoltage. (12) Do not exceed maximum power specifications when adjusting the output trim. (13) Note that the converter may operate up to +110°C with the baseplate installed. However, thermal self-protection occurs near +110°C, and there is a temperature gradient between the hotspot and the baseplate. Therefore, +100°C is recom- mended to avoid thermal shutdown. (14) The converter is guaranteed to turn off at the UV shutdown voltage. (15) At full power, the package temperature of all on-board components must not exceed +128°C. www.murata-ps.com/support MDC_UVQ Models.F06 Page 19 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters In critical applications, output ripple/noise (also referred to as periodic and On/Off Control random deviations or PARD) can be reduced below specified limits using filter- The primary-side, Remote On/Off Control function (pin 2) can be specified to ing techniques, the simplest of which is the installation of additional external operate with either positive or negative logic. Positive-logic devices ("P" suffix) output capacitors. Output capacitors function as true filter elements and are enabled when pin 2 is left open or is pulled high. Positive-logic devices are should be selected for bulk capacitance, low ESR, and appropriate frequency disabled when pin 2 is pulled low. Negative-logic devices are off when pin 2 is response. high/open and on when pin 2 is pulled low. See Figure 4. All external capacitors should have appropriate voltage ratings and be Dynamic control of the remote on/off function is best accomplished with a located as close to the converter as possible. Temperature variations for all mechanical relay or an open-collector/open-drain drive circuit (optically iso- TM relevant parameters should be taken into consideration. OS-CON organic lated if appropriate). The drive circuit should be able to sink appropriate current semiconductor capacitors (www.sanyo.com) can be especially effective for (see Performance Specifications) when activated and withstand appropriate further reduction of ripple/noise. The most effective combination of external I/O voltage when deactivated. capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. EQUIVALENT CIRCUIT FOR 1 + VIN +Vcc 7 POSITIVE AND NEGATIVE +SENSE LOGIC MODELS 8 +VOUT 2 RLOAD O N /O F F C1 C2 SCOPE CONTROL C O N TR O L 4 –VOUT 5 REF –SENSE 3 –VIN COMMON C1 = 1µF C2 = 10µF Figure 4. Driving the Remote On/Off Control Pin LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple/Noise (PARD) Current Limiting (Power limit with current mode control) As power demand increases on the output and enters the specified “limit Start-Up Threshold and Undervoltage Shutdown inception range” (current in voltage mode and power in current mode) limiting Under normal start-up conditions, the UVQ Series will not begin to regulate circuitry activates in the DC-DC converter to limit/restrict the maximum current properly until the ramping input voltage exceeds the Start-Up Threshold. or total power available. In voltage mode, current limit can have a “constant or Once operating, devices will turn off when the applied voltage drops below foldback” characteristic. In current mode, once the current reaches a certain the Undervoltage Shutdown point. Devices will remain off as long as the range the output voltage will start to decrease while the output current con- undervoltage condition continues. Units will automatically re-start when the tinues to increase, thereby maintaining constant power, until a maximum peak applied voltage is brought back above the Start-Up Threshold. The hysteresis current is reached and the converter enters a “hic-up” (on off cycling) mode of built into this function avoids an indeterminate on/off condition at a single input operation until the load is reduced below the threshold level, whereupon it will voltage. See Performance/Functional Specifications table for actual limits. return to a normal mode of operation. Current limit inception is defined as the Pre-Bias Protection point where the output voltage has decreased by a pre-specified percentage For applications where a pre-bias potential can be present at the output of the (usually a 2% decrease from nominal). power module it is recommended that either blocking diodes are added in series Short Circuit Condition (Current mode control) with the Vout power lines or, a preferred solution is to use an OR-ing FET control- The short circuit condition is an extension of the “Current Limiting” condition. ler like the LM5050-1 High-Side & LM5051 Low-Side OR-ing FET Controller from When the monitored peak current signal reaches a certain range, the PWM TI. Starting the module into a pre-bias condition can cause permanent damage controller’s outputs are shut off thereby turning the converter “off.” This is to the module. followed by an extended time out period. This period can vary depending on Start-Up Time other conditions such as the input voltage level. Following this time out period, The VIN to VOUT Start-Up Time is the interval between the point at which a the PWM controller will attempt to re-start the converter by initiating a “normal ramping input voltage crosses the Start-Up Threshold voltage and the point at start cycle” which includes softstart. If the “fault condition” persists, another which the fully loaded output voltage enters and remains within its specified “hic-up” cycle is initiated. This “cycle” can and will continue indefinitely until ±1% accuracy band. Actual measured times will vary with input source imped- such time as the “fault condition” is removed, at which time the converter ance, external input capacitance, and the slew rate and final value of the input will resume “normal operation.” Operating in the “hic-up” mode during a fault voltage as it appears to the converter. The On/Off to VOUT start-up time assumes condition is advantageous in that average input and output power levels are that the converter is turned off via the Remote On/Off Control with the nominal held low preventing excessive internal increases in temperature. input voltage already applied. www.murata-ps.com/support MDC_UVQ Models.F06 Page 20 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Thermal Shutdown UVQ converters are equipped with thermal-shutdown circuitry. If the inter- 8 nal temperature of the DC-DC converter rises above the designed operating 1 +VOUT +VIN temperature (See Performance Specifications), a precision temperature sensor 7 +SENSE will power down the unit. When the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. 2 6 ON/OFF TRIM LOAD CONTROL RTRIM DOWN Output Overvoltage Protection 5 The output voltage is monitored for an overvoltage condition via magnetic cou- –SENSE pling to the primary side. If the output voltage rises to a fault condition, which 3 4 –VIN –VOUT could be damaging to the load circuitry (see Performance Specifications), the sensing circuitry will power down the PWM controller causing the output volt- age to decrease. Following a time-out period the PWM will restart, causing the Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors output voltage to ramp to its appropriate value. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. On UVQs, a single resistor connected from the Trim pin (pin 6) to the +Sense (pin 7) will increase the output voltage. A resistor connected from the Trim Pin Input Reverse-Polarity Protection (pin 6) to the –Sense (pin 5) will decrease the output voltage. If the input-voltage polarity is accidentally reversed, an internal diode will Trim adjustments greater than the specified +10%/–20% can have an become forward biased and likely draw excessive current from the power adverse affect on the converter’s performance and are not recommended. source. If the source is not current limited or the circuit appropriately fused, it OUT and Sense, in conjunction with trim Excessive voltage differences between V could cause permanent damage to the converter. adjustment of the output voltage, can cause the overvoltage protection circuitry Input Fusing to activate (see Performance Specifications for overvoltage limits). Temperature/power derating is based on maximum output current and Certain applications and/or safety agencies may require the installation of voltage at the converter's output pins. Use of the trim and sense functions can fuses at the inputs of power conversion components. Fuses should also be cause output voltages to increase, thereby increasing output power beyond used if the possibility of a sustained, non-current-limited, input-voltage polarity the UVQ's specified rating, or cause output voltages to climb into the output reversal exists. For Murata Power Solutions' UVQ Series DC-DC Converters, overvoltage region. Therefore: fast-blow fuses are recommended with values no greater than twice the (VOUT at pins) x (IOUT) ≤ rated output power maximum input current. The Trim pin (pin 6) is a relatively high impedance node that can be suscep- Trimming Output Voltage tible to noise pickup when connected to long conductors in noisy environments. UVQ converters have a trim capability (pin 6) that enables users to adjust the Note: Higher output 24V and 48V converters require larger, low-tempco, output voltage from +10% to –20% (refer to the trim equations). Adjustments precision trim resistors. An alternative is a low-TC multi-turn potentiometer to the output voltage can be accomplished with a single fixed resistor as shown in Figures 5 and 6. A single fixed resistor can increase or decrease the output Soldering Guidelines voltage depending on its connection. Resistors should be located close to Murata Power Solutions recommends the specifications below when installing these the converter and have TCR's less than 100ppm/°C to minimize sensitivity to converters. These specifications vary depending on the solder type. Exceeding these changes in temperature. If the trim function is not used, leave the trim pin open. specifications may cause damage to the product. Your production environment may dif- fer; therefore please thoroughly review these guidelines with your process engineers. 8 Wave Solder Operations for through-hole mounted products (THMT) 1 +VOUT +VIN For Sn/Ag/Cu based solders: 7 +SENSE Maximum Preheat Temperature 115° C. Maximum Pot Temperature 270° C. 2 ON/OFF 6 TRIM LOAD CONTROL Maximum Solder Dwell Time 7 seconds RTRIM UP 5 For Sn/Pb based solders: –SENSE Maximum Preheat Temperature 105° C. 3 4 –VIN –VOUT Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 6 seconds Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors www.murata-ps.com/support MDC_UVQ Models.F06 Page 21 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Trim Equations FEATURES AND OPTIONS Trim Up Trim Down Remote Sense Note: The Sense and VOUT lines are internally connected through low-value UVQ-1.5/40-D24 resistors. Nevertheless, if the sense function is not used for remote regulation 6.23(VO – 1.226) 7.64 the user must connect the +Sense to +VOUT and -Sense to –VOUT at the DC-DC –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN VO – 1.5 1.5 – VO converter pins. UVQ series converters employ a sense feature to provide point of use regu- UVQ-2.5/40-D48, UVQ-2.5/35-D24 lation, thereby overcoming moderate IR drops in pcb conductors or cabling. The remote sense lines carry very little current and therefore require minimal 10(VO – 1.226) 12.26 –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN cross-sectional-area conductors. The sense lines, which are capacitively VO – 2.5 2.5 – VO coupled to their respective output lines, are used by the feedback control-loop UVQ-3.3/35-D48 to regulate the output. As such, they are not low impedance points and must be treated with care in layouts and cabling. Sense lines on a pcb should be run 13.3(VO – 1.226) 16.31 –10.2 –10.2 adjacent to dc signals, preferably ground. In cables and discrete wiring applica- RT (kΩ) = RT (kΩ) = UP DOWN VO – 3.3 3.3 – VO tions, twisted pair or other techniques should be implemented. UVQ series converters will compensate for drops between the output voltage UVQ-5/25-D24, UVQ-5/20-D48 at the DC-DC and the sense voltage at the DC-DC provided that: 25.01 20.4(VO – 1.226) –10.2 RT (kΩ) = –10.2 RT (kΩ) = [VOUT(+) –VOUT(–)] – [Sense(+) –Sense (–)] ≤ 10% VOUT DOWN UP 5 – VO VO – 5 UVQ-12/8-D24, -12/10-D48 Contact and PCB resistance 49.6(VO – 1.226) 60.45 losses due to IR drops –10.2 RT (kΩ) = RT (kΩ) = –10.2 UP DOWN VO – 12 8 12 – VO 1 +OUTPUT –INPUT IOUT UVQ-15/7-D24, -D48 7 +SENSE Sense Current 62.9(VO – 1.226) 76.56 2 ON/OFF RT (kΩ) = –10.2 RT (kΩ) = –10.2 UP DOWN 6 TRIM LOAD CONTROL VO – 15 15 – VO Sense Return 5 –SENSE UVQ-18/5.6-D24, -18/6-D48 IOUT Return 3 4 75.5(VO – 1.226) 92.9 +INPUT –OUTPUT –10.2 –10.2 RT (kΩ) = RT (kΩ) = DOWN UP VO – 18 18 – VO Contact and PCB resistance losses due to IR drops UVQ-24/4.5-D24, -D48 Figure 8. Remote Sense Circuit Configuration 101(VO – 1.226) 124.2 –10.2 RT (kΩ) = –10.2 RT (kΩ) = DOWN UP 24 – VO VO – 24 Output overvoltage protection is monitored at the output voltage pin, not the Sense pin. Therefore, excessive voltage differences between VOUT and UVQ-48/2.5-D24, -D48 Sense in conjunction with trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see Performance Specifications for 250 210.75(VO – 1.226) –10.2 –10.2 RT (kΩ) = RT (kΩ) = DOWN UP overvoltage limits). Power derating is based on maximum output current and VO – 48 48 – VO voltage at the converter's output pins. Use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the (20kΩ typical) connected between +Vout and –Vout with the wiper to the Trim conveter's specified rating, or cause output voltages to climb into the output pin. overvoltage region. Therefore, the designer must ensure: (VOUT at pins) × (IOUT) ≤ rated output power www.murata-ps.com/support MDC_UVQ Models.F06 Page 22 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters Thermal Performance UVQ Series Aluminum Heatsink The HS-QB25-UVQ heatsink has a thermal resistance of 12 °C/Watt of internal The UVQ series converter baseplate can be attached either to an enclosure wall heat dissipation with “natural convection” airflow (no fans or other mechanical or a heatsink to remove heat from internal power dissipation. The discus- airflow) at sea level altitude. This thermal resistance assumes that the heatsink sion below concerns only the heatsink alternative. The UVQs are available is firmly attached using the supplied thermal pad and that there is no nearby with a low-profile extruded aluminum heatsink kit, models HS-QB25-UVQ, wall or enclosure surface to inhibit the airflow. The thermal pad adds a negli- HS-QB50-UVQ, and HS-QB100-UVQ. This kit includes the heatsink, thermal gible series resistance of approximately 0.5°C/Watt so that the total assembled mounting pad, screws and mounting hardware. See the assembly diagram resistance is 12.5°C/Watt. below. Do not overtighten the screws in the tapped holes in the converter (3.5 Be aware that we need to handle only the internal heat dissipation, not the n-m or 1.9 in-oz. max.). This kit adds excellent thermal performance without full power output of the converter. This internal heat dissipation is related to the sacrificing too much component height. See the Mechanical Outline Drawings efficiency as follows: for assembled dimensions. If the thermal pad is firmly attached, no thermal compound (“thermal grease”) is required. Power Dissipation [Pd] = Power In – Power Out [1] Power Out / Power In = Efficiency [in %] / 100 [2] PAN HEAD SCREW Power Dissipation [Pd] = Power In x (1 –Efficiency%/100) [3] M3 X 7MM 4 PLCS Power Dissipation [Pd] = Power Out x (1 / (Efficiency%/100) - 1) [4] Efficiency of course varies with input voltage and the total output power. Please refer to the Performance Curves. Since many applications do include fans, here is an approximate equation to LOCK WASHER calculate the net thermal resistance: M3 4 PLCS RQ [at airflow] = RQ [natural convection] / (1 + (Airflow in LFM) x [Airflow Constant]) [5] Where, FLAT WASHER NO. 4 RQ [at airflow] is the net thermal resistance (in °C/W) with the amount of 4 PLCS airflow available and, RQ [natural convection] is the still air total path thermal resistance or in this case 12.5°C/Watt and, “Airflow in LFM” is the net air movement flow rate immediately at the converter. This equation simplifies an otherwise complex aerodynamic model but is a HEATSINK useful starting point. The “Airflow Constant” is dependent on the fan and enclo- sure geometry. For example, if 200 LFM of airflow reduces the effective natural convection thermal resistance by one half, the airflow constant would be 0.005. There is no practical way to publish a “one size fits all” airflow constant HEAT TRANSFER PAD because of variations in airflow direction, heatsink orientation, adjacent walls, (Peel off white plastic enclosure geometry, etc. Each application must be determined empirically and backing material before the equation is primarily a way to help understand the cooling arithmetic. attaching to heatsink) This equation basically says that small amounts of forced airflow are quite effective removing the heat. But very high airflows give diminishing returns. Conversely, no forced airflow causes considerable heat buildup. At zero airflow, cooling occurs only because of natural convection over the heatsink. Natural convection is often well below 50 LFM, not much of a breeze. While these equations are useful as a conceptual aid, most users find it very difficult to measure actual airflow rates at the converter. Even if you know the velocity specifications of the fan, this does not usually relate directly to the enclosure geometry. Be sure to use a considerable safety margin doing Figure 7. Model UVQ Heatsink Assembly Diagram thermal analysis. If in doubt, measure the actual heat sink temperature with a calibrated thermocouple, RTD or thermistor. Safe operation should keep the When assembling these kits onto the converter, include ALL kit hardware to heat sink below 100°C. assure adequate mechanical capture and proper clearances. Thread relief is 0.090" (2.3mm). Calculating Maximum Power Dissipation To determine the maximum amount of internal power dissipation, find the ambient temperature inside the enclosure and the airflow (in Linear Feet per Minute – LFM) at the converter. Determine the expected heat dissipation using www.murata-ps.com/support MDC_UVQ Models.F06 Page 23 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp DC-DC Converters the Efficiency curves and the converter Input Voltage. You should also compen- Since the ambient thermal resistance of the heatsink and pad is 12.5°C/W, sate for lower atmospheric pressure if your application altitude is considerably we need additional forced cooling to get us down to 6.9°C/W. Using a hypo- above sea level. thetical airflow constant of 0.005, we can rearrange equation [5] as follows: The general proceedure is to compute the expected temperature rise of the (Required Airflow, LFM) x (Airflow Constant) = RQ[Nat.Convection] / heatsink. If the heatsink exceeds +100°C. either increase the airflow and/or RQ[at airflow] –1 reduce the power output. Start with this equation: Internal Heat Dissipation [Pd in Watts] = (Ts – Ta)/RQ [at airflow] [6] or, (Required Airflow, LFM) x (Airflow Constant) = 12.5/6.9 –1 = 0.81 and, where “Ta” is the enclosure ambient air temperature and, rearranging again, where “Ts” is the heatsink temperature and, (Required Airflow, LFM) = 0.81/0.005 = 162 LFM where “RQ [at airflow]” is a specific heat transfer thermal resistance (in degrees Celsius per Watt) for a particular heat sink at a set airflow rate. We 162 LFM is the minumum airflow to keep the heatsink below +90°C. have already estimated RQ [at airflow] in the equations above. Increase the airflow to several hundred LFM to reduce the heatsink tempera- Note particularly that Ta is the air temperature inside the enclosure at the ture further and improve life and reliability. heatsink, not the outside air temperature. Most enclosures have higher internal temperatures, especially if the converter is “downwind” from other heat-pro- ducing circuits. Note also that this “Pd” term is only the internal heat dissipated inside the converter and not the total power output of the converter. We can rearrange this equation to give an estimated temperature rise of the heatsink as follows: Ts = (Pd x RQ [at airflow]) + Ta [7] Heatsink Kit * Still Air (Natural convection) Heatsink height Model Number thermal resistance (see drawing) HS-QB25-UVQ 12°C/Watt 0.25" (6.35mm) HS-QB50-UVQ 10.6°C/Watt 0.50" (12.7mm) HS-QB100-UVQ 8°C/Watt 1.00" (25.4mm) 2.28 * Kit includes heatsink, thermal pad and mounting hardware. These are (57.91) non-RoHS models. For RoHS-6 versions, add “-C” to the model number 1.860 (e.g., HS-QB25-UVQ-C). (47.24) Heat Sink Example Assume an efficiency of 92% and power output of 100 Watts. Using equation [4], Pd is about 8.7 Watts at an input voltage of 48 Volts. Using +30°C ambient temperature inside the enclosure, we wish to limit the heat sink temperature to +90°C maximum baseplate temperature to stay well away from thermal shut- 1.03 1.45 down. The +90°C. figure also allows some margin in case the ambient climbs (26.16) (36.83) above +30°C or the input voltage varies, giving us less than 92% efficiency. The heat sink and airflow combination must have the following characteristics: 8.7 W = (90-30) / RQ[airflow] or, RQ[airflow] = 60/8.7 = 6.9°C/W 0.140 DIA. (3.56) (4 PLACES) * MATERIAL: BLACK ANODIZED ALUMINUM 0.10 (2.54) * UVQ SERIES HEATSINKS ARE AVAILABLE IN 3 HEIGHTS: 0.25 (6.35), 0.50 (12.70) AND 1.00 (25.4) Dimensions in inches (mm) www.murata-ps.com/support MDC_UVQ Models.F06 Page 24 of 25 UVQ Series Low Profile, Isolated Quarter Brick 2.5–40 Amp 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 airflow and heat dissipation analysis of power products. The system includes a precision low flow-rate anemometer, IR Transparent optical window variable speed fan, power supply input and load controls, Variable temperature gauges, and adjustable heating element. Unit under speed fan test (UUT) The IR camera monitors the thermal performance of the 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 soldered down to a 10" x 10" host carrier board for realistic heat absorption and spreading. Both longitudinal and trans- verse airflow studies are possible by rotation of this carrier Heating board since there are often significant differences in the heat element dissipation in the two airflow directions. The combination of Precision adjustable airflow, adjustable ambient heat, and adjustable low-rate Input/Output currents and voltages mean that a very wide anemometer range of measurement conditions can be studied. 3” below UUT The collimator reduces the amount of turbulence adjacent to the UUT by minimizing airflow turbulence. Such turbu- lence influences the effective heat transfer characteristics Ambient and gives false readings. Excess turbulence removes more temperature heat from some surfaces and less heat from others, possibly sensor causing 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 conditions. Figure 9. Vertical Wind Tunnel This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ 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. © 2017 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UVQ Models.F06 Page 25 of 25