PQ55530HEB08 SYNQOR | Alldatasheet

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SSpecificationpecification PQ55530HEB08PQ55530HEB08 Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 1 TThhee PPQQ5555553300HHEEBB0088 PPoowweerrQQoorr®® EExxaa ccoonnvveerrtteerr iiss aann iissoo-- llaatteedd,, ffiixxeedd sswwiittcchhiinngg ffrreeqquueennccyy DDCC//DDCC ccoonnvveerrtteerr tthhaatt uusseess ssyynncchhrroonnoouuss rreeccttiiffiiccaattiioonn ttoo aacchhiieevvee eexxttrreemmeellyy hhiigghh eeffffiicciieennccyy aanndd ppoowweerr ddeennssiittyy.. TThhiiss mmoodduullee iiss iiddeeaallllyy ssuuiitteedd ttoo ssuuppppoorrtt tthhee IIEEEEEE 880022..33aaff ssttaannddaarrdd ffoorr PPoowweerr OOvveerr LLAANN aanndd VVooIIPP aapppplliiccaattiioonnss.. TThhee 5533VVoouutt mmoodduulleess ffeeaattuurree 22,,225500VVddcc iissoollaa-- ttiioonn aanndd llooww ccoommmmoonn mmooddee nnooiissee.. TThhee EExxaa sseerriieess ccoonnvveerrtt-- eerrss ooffffeerr iinndduussttrryy lleeaaddiinngg uusseeaabbllee oouuttppuutt ppoowweerr ffoorr aannyy ssttaann-- ddaarrdd ““hhaallff--bbrriicckk”” mmoodduullee.. RRooHHSS ccoommpplliiaanntt ((sseeee ppaaggee 1133)).. PQ55530HEB08 Module 48V48V inin 53V53Voutout 7.6Amp7.6Amp 2250Vdc2250Vdc Half-brick Half-brick InputInput OutputOutput CurrentCurrent IsolationIsolation DC/DC ConverDC/DC Conver terter

  • Ultra-high efficiency, 95% at full rated load current
  • Delivers up to 400 Watts of output power with minimal derating - optional open frame unit available
  • Input voltage range: 38V – 55V, with 80V for 100 ms input transient capability
  • Fixed frequency switching provides predictable EMI per- formance
  • On-board input and output filtering Operational FeaturesOperational Features
  • Industry standard half-brick pin-out configuration
  • Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
  • Total height only 0.50” (12.7mm) for baseplated unit, open-frame only 0.420” (10.67mm)
  • Total weight: 4.3 oz. (123 grams) for baseplated unit, open-frame 2.6oz. (75 grams) Mechanical FeaturesMechanical Features
  • On/Off control referenced to input side (positive and negative logic options are available)
  • Remote sense for the output voltage compensates for output distribution drops
  • Output voltage trim permits custom voltages and voltage margining ContrContr ol Featuresol Features
  • Input under-voltage lockout disables converter at low input voltage conditions
  • Output current limit and short circuit protection protects converter and load from permanent damage
  • Active back bias limit prevents damage to converter from external load induced pre-bias
  • Latching output over-voltage protection
  • Thermal shutdown PrProtection Featuresotection Features
  • 2250V, 30 MW input-to-output isolation UL/cUL 60950-1 recognized (US & Canada), basic insulation rating
  • TUV certified to EN60950-1
  • Meets 72/23/EEC and 93/68/EEC directives
  • Meets UL94V-0 flammability requirements Safety FeaturesSafety Features

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 2 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V

53 V53 V

7.6 A7.6 A Half-brickHalf-brick MECHANICAL DIAGRAM (base-plated) 0.50 (12.7) Bottom side Clearance .030 +.028 (3.68) See Note 6 Pin Farside Typical M3 Threaded Standoff

4 Places

0.20 (5.1) 0.20 (5.1) 1.90 (48.3) 1.90 (48.3) 2.00 (50.8) 2.30 (58.4) 0.400 (10.16) 0.19 (4.8) 0.50 (12.6) 2.40 (61.0) 0.400 (10.16) 1.000 (25.40) 1.400 (35.56) 1.400 (35.56) 0.700 (17.78) NOTES 1) M3 screws used to bolt unit’s baseplate to other surfaces (such as heatsink) must not exceed 0.100” (2.54 mm) depth below the surface of the baseplate. 2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm) 3) Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface 4) Pins 1, 2, 4, 6-8, are 0.040” (1.02mm) diameter with 0.080” (2.03mm) diameter standoff shoulders 5) Pins 5, 9 are 0.080” (2.03mm) diameter shoulderless pins. 6) Other pin extension lengths available 7) All Pins: Material - Copper Alloy Finish (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin over Nickel plate 8) Undimensioned components are shown for visual reference only. 9) Weight: 4.3 oz. (123 g) typical 10) All dimensions in inches (mm) 11) Workmanship: Meets or exceeds IPC-A-610C Class II 12) For information regarding soldering and cleaning of base-plat- ed units please refer to the “Base-Plate Soldering & Cleaning prod uct advisory” on our website’s Technical Documents page. Load Board Lowest Component Flanged Pin See Note 12 Pin No. Name Function

1 Vin(+) Positive input voltage

2 ON/OFF TTL input to turn converter

on and off, referenced to Vin(-), with internal pull up.

4 Vin(-) Negative input voltage

5 Vout(-) Negative output voltage

6 SENSE(-) Return remote sense

7 TRIM Output voltage trim

8 SENSE(+) Positive remote sense

9 Vout(+) Positive output voltage

Notes: 1. SENSE(–) should be connected to Vout(–) either remotely or at the converter. 2. Leave TRIM pin open for nominal output voltage. 3. SENSE(+) should be connected to Vout(+) either remotely or at the converter. PIN DESIGNATIONS

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 3 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick PIN DESIGNATIONS Pin connections are identical to baseplated version shown on page 2. Use “A” as 10th letter in part number for open frame version (see ordering page ). MECHANICAL DIAGRAM (open frame) 0.145 typ. (3.68) See Note 3 0.420 (10.67) Bottom side Clearance .030 +.028 (0.81 +.71) 2.30 (58.4) 1.90 (48.3) .19 (4.8) 1.40 (35.56) 1.000 (35.56) .700 (17.78) .400 (10.16) .50 (12.7) .400 (10.16) 1.40 (35.56) 2.40 (61.0) NOTES 1) Pins 1-4, 6-8 are 0.040” (1.02mm) diameter. with 0.080” (2.03mm) diameter standoff shoulders. 2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125” (3.18mm) diameter standoff shoulders. 3) Other pin extension lengths available. Recommended pin length is 0.03” (0.76mm) greater than the PCB thickness. 4) All Pins: Material - Copper Alloy Finish (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin over Nickel plate 5) Undimensioned components are shown for visual reference only. 6) All dimensions in inches (mm) 7) Weight: 2.6 oz. (75 g) typical 8) Workmanship: Meets or exceeds IPC-A-610C Class II UL/TUV standards require a clearance greater than 0.04” (1.02mm) between input and output for Basic insulation. This issue should be con- sidered if any copper traces are on the top side of the user’s board. Note that the ferrite cores are considered part of the input/primary circuit. 10) The flanged pins are designed to permit surface mount soldering (avoiding the wave soldering process) through the use of the flanged pin-in-paste technique. Load Board Lowest Component Flanged Pin See Note 10 Top View Side View

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 4 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick Parameter Min. Typ. Max. Units Notes & Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating 80 V Continuous Operating 60 V Continuous Operating Transient Protection 80 V 100ms transient Isolation Voltage (input to output) 2250 V Basic insulation level, Pollution degree 2 Operating Temperature -40 100 °C Storage Temperature -55 125 °C Voltage at ON/OFF input pin -2 18 V INPUT CHARACTERISTICS Operating Input Voltage Range 38 48 55 V Input Under-Voltage Lockout Turn-On Voltage Threshold 34.0 35.2 36.4 V Turn-Off Voltage Threshold 32.0 33.0 34.3 V Lockout Voltage Hysteresis 2.1 V Maximum Input Current 11.8 A 100% Load, 38 Vin, trim up 5% No-Load Input Current 140 mA Disabled Input Current 42 68 mA Vin = 38V Inrush Current Transient Rating 0.01 A 2s Input Reflected Ripple Current 20 40 mA RMS thru 4.7 µH inductor; Figures 16 & 18 Input Terminal Ripple Current 130 mA RMS ; Figures 12 & 17 Recommended Input Fuse 20 A Fast blow external fuse recommended Input Filter Component Values (L\\C) 1.0\\5.0 µH\\µF Internal values; see Figure D Recommended External Input Capacitance 100 µF Typical ESR 0.04 -1.0W; see Figure 16 OUTPUT CHARACTERISTICS Output Voltage Set Point (standard option) 52.50 53.00 53.50 V Output Voltage Set Point (“A” option 3) 52.75 53.00 53.25 V Output Voltage Regulation Over Line +0.05 \\ 20 +0.1 \\ 50 %\\mV Over Load +0.15 \\ 80 +0.2 \\ 105 %\\mV Over Temperature (standard option) +100 +158 mV Over Temperature (“A” option 3) +50 +79 mV Total Output Voltage Range 51.95 53.95 V Over sample, line, load, temperature & life Output Voltage Ripple and Noise 1 20MHz bandwidth; Figures 15 & 16 Peak-to-Peak 150 mV Full Load; see Figures 16 & 19 RMS 20 50 mV Full Load; see Figures 16 & 19 Operating Output Current Range 0 7.6 A Subject to thermal derating; Figures 5, 7 - 10 Output DC Current-Limit Inception 9.5 10.5 11.5 A Output Voltage 10% Low; Figure 20 Back-Drive Current Limit while Enabled 0.5 1.38 2.0 A 54V pre-bias voltage on output Back-Drive Current Limit while Disabled 50 90 120 mA " Maximum Output Capacitance 1,000 µF 53Vout at 7.6A Resistive Load DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection 60 dB 120 Hz; Figure 20 Output Voltage during Load Current Transient For a Step Change in Output Current (0.1A/µs) 600 mV 50-75-50% Iout max; 200µF cap; Figure 13 For a Step Change in Output Current (1A/µs) 600 mV 50-75-50% Iout max; 200µF cap; Figure 14 Settling Time 600 µs To within 0.2% Vout nom Turn-On Transient Turn-On Time 15 20 28 ms Full load, Vout=90% nom.; Figures 11 & 12 Start-Up Delay Time 4 6 8 ms -40°C to +125°C; Figure E Output Voltage Overshoot 0 % 1,000 µF load capacitance, Iout = 0A EFFICIENCY 100% Load 95 % Figures 1 - 4 50% Load 95 % Figures 1 - 4 TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature 125 °C Package rated to 150°C Board Temperature 125 °C UL rated max operating temp 130°C Transformer Temperature 125 °C See Figures 5 , 7 - 10 for derating curves Maximum Baseplate Temperature 100 °C Applies to PQ55525HEB08xxx unit only ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) 2250 V Isolation Resistance 30 MW Isolation Capacitance2 220 pF PQ55530HEx08 ELECTRICAL CHARACTERISTICS TA=25°C, airflow rate=300 LFM, V in=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice. Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com) Note 2: Higher values of isolation capacitance can be added external to the module. Note 3: See the last page for ordering information options.

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 5 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick ParameterP Min. Typ. Max. Units Notes & Conditions FEATURE CHARACTERISTICS Switching Frequency 275 300 325 kHz Regulation and Isolation stages ON/OFF Control (Option P) Off-State Voltage -2 0.8 V On-State Voltage 2.7 18 V ON/OFF Control (Option N) Off-State Voltage 2.7 18 V On-State Voltage -2 0.8 V ON/OFF Control (Either Option) Figure A Pull-Up Voltage 5 5.5 V Pull-Up Resistance 10 kW Output Voltage Trim Range -50 +5 % Measured across Pins 9 & 5; Figure B Output Voltage Remote Sense Range +5 % Measured across Pins 9 & 5 Output Over-Voltage Protection 57 58.5 60 V Over full temp range; % of nominal Vout, Latching Over-Temperature Shutdown 125 °C Average PCB Temperature Over-Temperature Shutdown Restart Hysteresis 10 °C Load Current Scale Factor 180 See App Note: Output Load Current Calc. RELIABILITY CHARACTERISTICS STANDARDS COMPLIANCE ParameterP Notes STANDARDS COMPLIANCE UL/cUL 60950-1 File # E194341, Basic insulation & pollution degree 2 EN60950-1 Certified by TUV 72/23/EEC 93/68/EEC Needle Flame Test (IEC 695-2-2) Test on entire assembly; board & plastic components UL94V-0 compliant IEC 61000-4-2 ESD test, 8kV - NP, 15kV air - NP (Normal Per formance) GR-1089-CORE Section 7 - electrical safety, Section 9 - bonding/grounding Telcordia (Bellcore) GR-513

  • An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website . QUALIFICATION TESTING ParameterP # Units Test Conditions QUALIFICATION TESTING Life Test 32 95% rated V in and load, units at derating point, 1000 hours Vibration 5 10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis Mechanical Shock 5 100g minimum, 2 drops in x and y axis, 1 drop in z axis Temperature Cycling 10 -40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles Power/Thermal Cycling 5 T operating = min to max, Vin = min to max, full load, 100 cycles Design Marginality 5T min-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load Humidity 5 85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off Solderability 15 pins MIL-STD-883, method 2003
  • Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply robust, reliable product. Contact the factory for official product family qualification documents. ELECTRICAL CHARACTERISTICS (Continued) OPTIONS SynQor provides various options for Logic Sense, Pin Length and Feature Set for this family of DC/DC converters. Please consult the last page of this specification sheet for information on available options. PATENTS SynQor is protected under various patents, including but not lim- ited to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159 B2; 6,545,890 B2.

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 6 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick 100 Load Current (A) Efficiency (%)

38 Vin

48 Vin

55 Vin

Air Flow (LFM) Efficiency (%) 25C 40C 55C Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 °C, 40°C, and 55 °C (nominal input voltage). Load Current (A) Power Dissipation (W) Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 100 200 300 400 Air Flow (LFM) Power Dissipation (W) 25C 40C 55C Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 °C, 40°C, and 55°C (nominal input voltage). 0 25 40 55 70 85 Ambient Air Temperature (ºC) Iout (A) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) Figure 5: Maximum output power derating curves vs. ambient air temperature for a baseplated unit (full power at 100°C baseplate). Airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage). Figure 1: Efficiency at nominal output voltage vs. load current for min- imum, nominal, and maximum input voltage at 25 °C. Figure 6: Output voltage vs. load current showing typical current limit curves and converter shutdown points. -5 0 5 10 15 Load Current (A) Output Voltage (V) 35-75Vin OVP Shutdown

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 7 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick Figure 11: Turn-on transient at full load (resistive load) (20 ms/div). Input voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace: ON/OFF input (5V/div) Figure 12: Turn-on transient at zero load (20 ms/div). Top Trace: Vout (10V/div) Bottom Trace: ON/OFF input (5V/div) 0 25 40 55 70 85 Ambient Air Temperature (ºC) Iout (A) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) Figure 8: Thermal plot of converter at 5.1amp load current (271W) with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage). 0 25 40 55 70 85 Ambient Air Temperature (ºC) Iout (A) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) Figure 9: Maximum output power derating curves vs. ambient air tem- perature for an open frame unit. Airflow rates of 100 LFM through 400 LFM with air flowing from pin 1 to pin 4 (nominal input voltage). Figure 10: Thermal plot of converter at 4.95 amp load current (262W) with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter from pin 1 to pin 4 (nominal input voltage). Figure 7: Maximum output power derating curves vs. ambient air tem- perature for an open frame unit. Airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage).

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 8 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick Figure 17: Input Terminal Ripple Cur rent, ic, at full rated output cur - rent and nominal input voltage with 4.7 µH source inductor and 100 µF electrolytic capacitor (100 mA/div). See Figure 16 Figure 18: Input reflected ripple cur rent, is, through a 4.7 µH source inductor at nominal input voltage and rated load current (10 mA/div). (See Figure 16) Figure 15: Output voltage response to step-change in input voltage (1000V/ms). Load cap: 200µF , electrolytic output capacitance.Ch 1: Vin (20V/div), Ch 2: Vout (500mV/div). Figure 16: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 17), Input Reflected Ripple Current (Figure 18) and Output Voltage Ripple (Figure 19). 4.7 µH source impedance DC/DC Converter See Fig. 18 See Fig. 17 See Fig. 19 1 µF ceramic capacitor 200 µF, 200mW ESR electrolytic capacitor 100 µF, <1W ESR electrolytic capacitor VSOURCE VOUT Figure 13: Output voltage response to step-change in load current (50%-75%- 50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 200µF , electrolytic output capaci- tance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div). Figure 14: Output voltage response to step-change in load current (50%-75%- 50% of Iout(max): dI/dt = 1A/ µs). Load cap: 330µF , electrolytic output capaci- tance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 9 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick Figure 19: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1 µF ceramic capacitor and 200µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 12) Figure 21: Magnitude of incremental output impedance (Z out = vout/iout) for minimum, nominal, and maximum input voltage at full rated power. Figure 22: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power. -50 -40 -30 -20 -10 10 100 1,000 10,000 100,000 Hz Reverse Transmission (dB)

35 Vin

Figure 23: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power. 0.1 100 10 100 1,000 10,000 100,000 Hz Input Impedance (ohms)35 Vin Figure 24: Magnitude of incremental input impedance (Z in = vin/iin) for minimum, nominal, and maximum input voltage at full rated power . Figure 20: Load current (5A/div) as a function of time when the con- verter attempts to turn on into a 1 m W short circuit. -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 10 100 1,000 10,000 100,000 Hz Forward Transmission (dB) 35 Vin 0.0001 0.001 0.01 0.1 100 1,000 10,000 100,000 Hz Output Impedance (ohms)35 Vin

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 10 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick BASIC OPERATION AND FEATURES The PowerQor series converter uses a two-stage power conver- sion topology. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temper- ature. The second stage uses a transformer to provide the func- tions of input/output isolation and voltage step-down to achieve the low output voltage required. Both the first stage and the second stage switch at a fixed fre- quency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state resis- tance, dissipate far less energy than Schottky diodes. This is the primary reason that the PowerQor converter has such high effi- ciency, even at very low output voltages and very high output cur- rents. The PowerQor series of half-brick and quarter-brick converters uses the industry standard footprint and pin-out configuration. CONTROL FEATURES REMOTE ON/OFF (Pin 2 ): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). There are two versions of the converter that differ by the sense of the logic used for the ON/OFF input. In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. REMOTE SENSE(+ ) (Pins 8 and 6) : The SENSE(+ ) inputs cor- rect for voltage drops along the conductors that connect the con- verter’s output pins to the load. Pin 8 should be connected to Vout(+) and Pin 6 should be con- nected to Vout(-) at the point on the board where regulation is desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is [Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] < Sense Range % x Vout Pins 8 and 6 must be connected for proper regulation of the out- put voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than its specified value. Note: the output over-voltage protection circuit senses the voltage across the output (pins 9 and 5) to determine when it should trig- ger, not the voltage across the converter’s sense leads (pins 8 and 6). Therefore, the resistive drop on the board should be small enough so that output OVP does not trigger, even during load transients. Open Collector Enable Circuit Figure A: Various circuits for driving the ON/OFF pin. Remote Enable Circuit Direct Logic Drive Negative Logic (Permanently Enabled) Positive Logic (Permanently Enabled) ON/OFF Vin(_) ON/OFF ON/OFF Vin(_) ON/OFF TTL/ CMOS Vin(_) ON/OFF Vin(_) Vin(_)

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 11 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick OUTPUT VOLTAGE TRIM (Pin 7) : The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be Rtrim-down = ( 100% ) - 2 (k W)D where D% = Vnominal – Vdesired x 100%Vnominal To increase the output voltage, the user should connect a resistor between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be Figure B graphs the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down. Figure B: Trim Graph for 53Vout module Note: the TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection cir- cuit to engage, particularly during transients. It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise. Total DC Variation of Vout: For the converter to meet its full specifications, the maximum variation of the DC value of Vout, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. PROTECTION FEATURES Input Under-Voltage Lockout : The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the appli- cation note titled “Input System Instability”. The lockout circuitry is a comparator with DC hysteresis. When the input voltage is ris- ing, it must exceed the typical Turn-On Voltage Threshold value (listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit : If the load current is increased to the current limit threshold, the current will be limited at that value, and the output voltage will decrease as the load resistance is low- ered. When the load current is decreased below the current limit point, the voltage will recover to the normal, regulated level. Note: If the unit is held in overcurrent and the load is suddenly reduced to zero, an output voltage overshoot can occur and pos- sibly trip the overvoltage protection. Output Over-Voltage Pr otection: If the voltage across the output pins exceeds the Output Over -Voltage Protection threshold, the converter will immediately shut down and latch off. To reset this latched fault condition, either the ON/OFF pin must be tog - gled from on to off and back on again or the input power must be removed and re-applied. Over-Temperature Shutdown : A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over- Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. (kW)Rtrim-up = Vnominal – 2) x VDES + VNOM 1.225 VDES - VNOM 100 1,000 10,000 100,000 0 2 4 6 8 10 12 14 16 18 20 Trim Resistance (kOhms) % Increase in Vout % Decrease in Vout

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 12 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick APPLICATION CONSIDERATIONS Input System Instability: This condition can occur because any DC/DC converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure C provides a typical circuit dia- gram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure D pro- vides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external elec- trolytic input capacitor. The recommended external input capac- itance is specified in the “Input Characteristics ” section. More detailed information is available in the application note titled “EMI Characteristics ” on the SynQor website. Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 6ms when it is shut down for any reason. In all, there are three ways that the converter can be shut down, initiating a Startup Inhibit Period:

  • Input Under-Voltage Lockout
  • Over Temperature Shutdown
  • Turned off by the ON/OFF input Figure E shows three turn-on scenarios, where a Startup Inhibit Period is initiated at t 0, t1, and t2: Before time t0, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input Under-Voltage Lockout is released, and a Startup Inhibit Period is initiated. At the end of this delay, the ON/OFF pin is evaluated, and since it is active, the unit turns on. At time t 1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has elapsed. If the input voltage quickly rises over UVLO at t 3, the output star t- up time is 12ms. Vin External Input Filter Trim Vin(+) Iload Cload L C Vout(+) Rtrim-up or Rtrim-down Vsense(+) ON/OFF Vin(_) Vin(+) Vin(_) Vout(_) Vsense(_) Electrolytic Capacitor 100µF Figure C: Typical application circuit (negative logic unit, permanently enabled). Figure D: Internal Input Filter Diagram (component values listed on page 4).

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 13 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick Figure E: Startup Inhibit Period (turn-on time not to scale) Vin Under-Voltage Lockout Turn-On Threshold ON/OFF (pos logic) Vout t0 t1 t2 t3 ON OFF ON 6mS 6mS 21mS 12mS RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercur y, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is available as 5/6 RoHS com- pliant (product with lead) or 6/6 RoHS compliant. For more infor- mation please refer to SynQor’s RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at rohs@synqor.com.

Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 14 TTechnical Sechnical Specificationpecification Input:Input: Output:Output: Current:Current: PPackage:ackage: 38-55 V38-55 V 7.6 A7.6 A Half-brickHalf-brick PART NUMBERING SYSTEM The part numbering system for SynQor’s PowerQor DC/DC converters follows the format shown in the example below. The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145” pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. A “-G” suffix indi - cates 6/6 RoHS compliance. Application Notes A variety of application notes and technical white papers can be downloaded in pdf format from our website

ORDERING INFORMATION

The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. To order 6/6 RoHS compliant product please add a “-G” suffix. The following option choices must be included in place of the x y z spaces in the model numbers listed above. PQ 55 530 H E B 08 N N S Product Family Package Size Performance Level Thermal Design Output Current Options (see Ordering Information) Input Voltage Output Voltage Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor. Contact SynQor for further information: Phone: 978-849-0600 Toll Free: 888-567-9596 Fax: 978-849-0602 E-mail: power@synqor .com Web: www .synqor.com Address: 155 Swanson Road Boxborough, MA 01719 USA Output Max Output Voltage Current PQ55530HEA08xyz 38 - 55 V 53.0 V 7.6 A PQ55530HEB08xyz 38 - 55 V 53.0 V 7.6 A Model Number Input Voltage Enable Pin Feature Logic Length Set P - Positive N - Negative K - 0.110" N - 0.145" R - 0.180" Y - 0.250" S - Standard A - Tight Accuracy Options Description: x y z