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Technical Specification
PQ60120HZX50
35-75V
Input
12V
Output
50A
Current
2250Vdc
Isolation
Half-brick
DC/DC Converter
The PQ60120HZA50 PowerQor(R) Zeta half-brick converter is a next-generation, board-mountable, isolated, fixed switching frequency DC/DC converter. The Zeta series offers industry leading power density for standard isolated DC/DC converters with both a wide input range and a tightly regulated output. Targeted for use in intermediate bus architectures, this module supplies an isolated step down voltage from 35-75V to 12V and provides more available power and higher efficiency than most competitive bus converters. This converter is available in open-frame and baseplated versions. RoHS Compliant (see page 13). Operational Features
* Ultra-highefficiency,95%atfullratedloadcurrent,96.5%athalf rated load current * Deliversupto50Aofoutputcurrent(600W)withoptionalbase-plate configuration * Wideinputvoltagerange:35V-75V,with100V100msinputvoltage transient capability * FixedfrequencyswitchingprovidespredictableEMIperformance * Nominimumloadrequirementmeansnopreloadresistorsrequired * Wideoutputvoltagetrimrange(-50%to+5%),seetrimsection
PQ60120HZA50
Protection Features
*Inputunder-voltagelockoutdisablesconverteratlowinput voltage conditions * Outputcurrentlimitandshortcircuitprotectionprotectsconverter and load from damage and consequent hazardous conditions * Activebackbiaslimitprovidessmoothstartupwithexternalload induced pre-bias *Latchingoutputover-voltageprotectionprotectsloadfrom damaging voltages *Thermalshutdownprotectsconverterfromabnormal environmental conditions
Mechanical Features
* Industrystandardhalf-brickpin-outconfiguration * Industrystandardsize:2.3"x2.4"(58.4x61.0mm) * Totalheightonly0.50"(12.7mm)forbaseplatedunit,open-frame only0.420"(10.67mm) * Totalweight:4.3oz(123g)forbaseplatedunit,theopen-frame units are 2.6 oz (75 g) * Openframeunitshaveflangedpinsdesignedtopermitsurface mountsoldering(avoidwavesolder)usingFPiPtechnique
Control Features
* On/Offcontrolreferencedtoinputside(positiveandnegativelogic options are available)
Contents
MECHANICALDIAGRAM(openframe) . . . . . . . . . . . . . . . . . . . . . . . . . 2 MECHANICALDIAGRAM(base-plated). . . . . . . . . . . . . . . . . . . . . . . . . 3 PQ60120HZA50ELECTRICALCHARACTERISTICS . . . . . . . . . . . . . . . 4-5 PQ60 Standards and Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 PQ60-HZFigures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 OrderingInformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Safety Features
* 2250Vinput-to-outputisolation * UL60950-1:2003,basicinsulation * CAN/CSA-C22.2No.60950-1:2003 * EN60950-1:2001 * RoHScompliant(seepage13)
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Doc.# 005-2HZ612J Rev. D
06/12/09
Page 1
Technical Specification
MECHANICAL DIAGRAM (open frame)
1.400[35.56] 1.000 [25.4] .700[17.78] .400[10.16] 2.40 [61]
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
.044.027 [1.120.68] BOTTOMSIDE CLEARANCE
2.30 [58.4] 1.90 [48.3] .19 [4.8]
9
8
7
6
5 TOP VIEW SIDE VIEW
1
2
3
4 .50 [12.7] .400 [10.16] 1.00[25.4] .413.017 [10.490.43] OVERALL HEIGHT .180 [4.57] SEE NOTE 3
1.400 [35.56]
NOTES
1) 2) 3) 4) 5) 6) 7) 8) 9) Pins1-4,6-8are0.040"(1.02mm)diameter,with0.080"(2.03mm) diameter standoff shoulders. Pins5and9are0.080"(2.03mm)diameterwith0.125"(3.18mm) diameter standoff shoulders. Otherpinextensionlengthsavailable.Recommendedpin lengthis0.03"(0.76mm)greaterthanthePCBthickness. AllPins:Material-CopperAlloy-Finish(RoHS6/6)-MatteTinover Nickelplate Undimensionedcomponentsareshownforvisualreferenceonly. Alldimensionsininches(mm)Tolerances:x.xx+/-0.02in.(x.x +/-0.5mm)x.xxx+/-0.010in.(x.xx+/-0.25mm) Weight:4.3oz(123g)forbaseplatedunit,open-frame2.6oz(75g) typical Workmanship:MeetsorexceedsIPC-A-610CClassII UL/TUVstandardsrequireaclearancegreaterthan0.04"(1.02mm) betweeninputandoutputforBasicinsulation.Thisissueshouldbe considered if any copper traces are on the top side of the user's board.Notethattheferritecoreshownatleftaboveisconsidered part of the input/primary circuit and that the two ferrite cores shown at the right above are considered part of the output/secondary circuit.
PIN DESIGNATIONS
Pin 1 2 3 4 5 6 7 8 9 Notes: Name Vin(+) ON/OFF Reserved Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+) Function Positive input voltage TTLinputtoturnconverteronandoff, referencedtoVin(-),withinternalpull up. Notconnected Negativeinputvoltage Negativeoutputvoltage Negativeremotesense;seenote1 Outputvoltagetrim;seenote2 Positiveremotesense;seenote3 Positive output voltage
1)SENSE(-)shouldbeconnectedtoVout(-)eitherremotelyorattheconverter. 2)LeaveTRIMpinopenfornominaloutputvoltage. 3)SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyorattheconverter.
10) The flanged pins are designed to permit surface mount soldering (allowing to avoid the wave soldering process) through the use of the flanged pin-in-paste technique.
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Doc.# 005-2HZ612J Rev. D
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Technical Specification
MECHANICAL DIAGRAM (base-plated)
2.40 [61 ] 2.00 [50.8] 1.400 [35.56] 1.000 [25.4] .700 [17.78] .400 [10.16]
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
.02 [5.1]
.145 [3.687] SEE NOTE 6 .495 .024 [12.570.6] OVERALL HEIGHT
9 2.30 [58.4] 1.90 [48.3] .19 [4.8 ] 1
8
7
6
5
TOP VIEW 1.90 [48.3]
SIDE VIEW
2
3
4 .50 [12.7] .400[10.16] 1.00 [25.4] 1.400 [35.56]
M3 THREADED INSERT 4 PLACES SEE NOTE 1
.044 0.27 [1.120.68] BOTTOMSIDE CLEARANCE
NOTES
1) M3screwsusedtoboltunit'sbaseplatetoothersurfaces(such asheatsink)mustnotexceed0.100"(2.54mm)depthbelowthe surface of the baseplate. 2) Appliedtorqueperscrewshouldnotexceed6in-lb.(0.7Nm) 3) Baseplateflatnesstoleranceis0.004"(.10mm)TIRforsurface 4) Pins1-4,6-8,are0.040"(1.02mm)diameterwith0.080" (2.03mm) diameter standoff shoulders 5) Pins5and9are0.080"(2.03mm)dia.with.125"(3.18)dia. shoulderless pins. 6) Otherpinextensionlengthsavailable 7) AllPins:Material:CopperAlloy Finish:Tin-LeadoverNickelplate 8) Undimensionedcomponentsareshownforvisualreferenceonly. 9) Weight:4.3oz(123g)typical 10) All dimensions in inches (mm) Tolerances:x.xx+/-0.02in.(x.x+/-0.5mm) x.xxx+/-0.010in.(x.xx+/-0.25mm) 11) Workmanship:MeetsorexceedsIPC-A-610CClassII 12) The flanged pins are designed to permit surface mount soldering (allowing to avoid the wave soldering process) through the use of the flanged pin-in-paste technique. Pin 1 2 3 4 5 6 7 8 9 Notes 1. 2. 3. Name Vin(+) ON/OFF Reserved Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+)
PINDESIGNATIONS
Function Positive input voltage TTLinputtoturnconverteronandoff,referencedtoVin(-), with internal pull up. Notconnected Negativeinputvoltage Negativeoutputvoltage Return remote sense Outputvoltagetrim Positive remote sense Positive output voltage
SENSE(-)shouldbeconnectedtoVout(-)eitherremotelyoratthe converter LeaveTRIMpinopenfornominaloutputvoltage. SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyoratthe converter.
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Page 3
Technical Specification
PQ60120HZA50 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature Storage Temperature Voltage at ON/OFF input pin INPUT CHARACTERISTICS OperatingInputVoltageRange InputUnder-VoltageLockout Turn-OnVoltageThreshold Turn-OffVoltageThreshold LockoutVoltageHysteresis MaximumInputCurrent No-LoadInputCurrent DisabledInputCurrent ResponsetoInputTransient InputReflectedRippleCurrent InputTerminalRippleCurrent RecommendedInputFuse InputFilterComponentValues(L\C) RecommendedExternalInputCapacitance OUTPUT CHARACTERISTICS OutputVoltageSetPoint OutputVoltageRegulation OverLine1 OverLoad1 OverTemperature TotalOutputVoltageRange OutputVoltageRippleandNoise2 Peak-to-Peak RMS OperatingOutputCurrentRange OutputDCCurrent-LimitInception OutputDCCurrent-LimitShutdownVoltage3 Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled MaximumOutputCapacitance DYNAMIC CHARACTERISTICS Output Voltage during Load Current Transient For a Step Change in Output C urrent (0.1A/s) For a Step Change in Output Current (5A/s) Settling Time Turn-On Transient Turn-On Time Output Voltage Overshoot EFFICIENCY 100% Load 50% Load TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature Board Temperature Transformer Temperature ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance4
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
TA=25C,airflowrate=300LFM,Vin=48Vdcunlessotherwisenoted;fulloperatingtemperaturerangeis-40Cto+100Cambient temperature with appropriate power derating. Specifications subject to change without notice.
Min. Typ. Max.
100 80 100 2250 100 125 18 48 33.0 30.5 2.5 125 20 1.0 5 220 0.75\11 220 12.00 +1.0\120 +1.0\120 +90 90 20 60 5.0 18 3 350 500 1 25 94.5 29 95.0 96.5 125 125 125 2250 30 1000 32 2 75 34.5 32.0 3.5 20 200 40 20 30 12.28 +240 12.40 150 30 50 70 23 4 12
Units
V V V V C C V V V V V A mA mA V mA mA A H\F F V %\mV %\mV mV V mV mV A A V A mA mF mV mV ms ms % % % C C C V MW pF
Notes & Conditions
Continuous Continuous 100ms transient, square wave Basic insulation, Pollution Degree 2
-40 -55 -2 35 31.5 29.0 1.5 11.72
100Vtransientfor100ms
100%Load,35Vin,trimmedup5% 0.25V/s input transient RMSthru4.7H inductor RMS Fastblowexternalfuserecommended Internal values; see Figure F (Lin\C2) Typical ESR 0.1-0.2W
11.60 0 55 13 0
Oversample,line,load,temperature&life 20MHzbandwidth FullLoad FullLoad Subjecttothermalderating OutputVoltage10%Low Negative current drawn from output source Negative current drawn from output source 12Voutat50AResistiveLoad 50% to 75% to 50% Iout max, 470 F load cap " To within 1% Vout nom Full load, ON/OFF to Vout=90% nom. Figures 1 & 2 Figures 1 & 2 Package rated to 150C UL rated max operating temp 130C See Figures 3 - 6 for derating curves
Note Note Note Note
1: 2: 3: 4:
Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference. For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com). If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode, with a 500ms off-time. Higher values of isolation capacitance can be added external to the module.
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Doc.# 005-2HZ612J Rev. D
06/12/09
Page 4
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS Switching Frequency Regulation Stage Switching Frequency Isolation Stage ON/OFF Control (Option P) Off-State Voltage On-State Voltage ON/OFF Control (Option N) Off-State Voltage On-State Voltage ON/OFF Control (Either Option) ON/OFF Control Hysteresis Pull-Up Voltage Pull Up Resistance Output Voltage Trim Range Output Over-Voltage Protection Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Field Demonstrated MTBF
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Min.
230 115 -2.0 4.0 4.0 -2 4.75 -50 113
Typ.
240 120
Max.
250 125 1.0 18 18 1.0
Units
kHz kHz V V V V V V kW % % C C 106 Hrs. 106 Hrs. 106 Hrs.
Notes & Conditions
Over sample, temp & life Over sample, temp & life
1.5 5.00 10 118 120 10 2.1 1.9
Figures A & B
5.25 +5 123
Measured across Pins 8 & 4; see trim section Over full temp range; % of nominal Vout Average PCB Temperature TR-NWT-000332; 80% load,300LFM, 40oC Ta MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta See website for details
PQ60 Standards and Qualifications
Parameter
STANDARDS COMPLIANCE UL60950-1:2003 CAN/CSA-C22.2No.60950-1:2003 EN60950-1:2001 NeedleFlameTest(IEC695-2-2) IEC61000-4-2 Testonentireassembly;board&plasticcomponentsUL94V-0compliant ESDtest,8kV-NP,15kVair-NP(NormalPerformance)
Notes & Conditions
Note:Anexternalinputfusemustalwaysbeusedtomeetthesesafetyrequirements.ContactSynQorforofficialsafetycertificatesonnew releases or download from the SynQor website.
Parameter
QUALIFICATION TESTING LifeTest Vibration MechanicalShock Temperature Cycling Power/Thermal Cycling DesignMarginality Humidity Solderability
# Units
32 5 5 10 5 5 5 15 pins
Test Conditions
95%ratedVinandload,unitsatderatingpoint,1000hours 10-55Hzsweep,0.060"totalexcursion,1min./sweep,120sweepsfor3axis 100g minimum, 2 drops in x and y axis, 1 drop in z axis -40Cto100C,unittemp.ramp15C/min.,500cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10CtoTmax+10C,5Csteps,VIN=mintomax,0-105%load 85C,85%RH,1000hours,continuousVIN applied except 5min./day MIL-STD-883,method2003
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06/12/09
Page 5
Technical Specification
100 98 96 50 45 40
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Power Dissipation (W)
94
35 30 25 20 15 10 5 0 35Vin 48Vin 75Vin
Efficiency (%)
92 90 88 86 84 82 80 0 10 20 30 40 50 35Vin 48Vin 75Vin
0
10
20
30
40
50
Load Current (A)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 2: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
50 45 40 35
Iout (A)
30 25 20 15 10 5 0 25 40 55 70 85
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (oC)
Figure 3: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing across the converter from pin 4 to pin 1 (nominal input voltage).
50 45 40 35
Figure 4: Thermal plot of converter at 36 A load current (432 W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter sideways from pin 4 to pin 1 (nominal input voltage).
Iout (A)
30 25 20 15 10 5 0 25 40 55 70 85
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (oC)
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing lengthwise from input to output (nominal input voltage).
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Figure 6: Thermal plot of converter at 36 A load current (432 W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage).
Doc.# 005-2HZ612J Rev. D 06/12/09 Page 6
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Technical Specification
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div). Ch 1: Vout (5 V/div) Ch 2: ON/OFF input (5 V/div)
Figure 8: Turn-on transient at zero load (10 ms/div). Ch 1: Vout (5 V/div) Ch 2: ON/OFF input (5 V/div)
Figure 9: Output voltage response to step-change in load current (50%-75%-50% of Iout(max); dI/dt = 0.1 A/s; 1 ms/div). Load cap: 1 uF ceramic and 470 F, 15 mW ESR electrolitic capacitors. Top trace: Vout (500 mV/div). Bottom trace: Iout (10 A/div).
Figure 10: Output voltage response to step-change in load current (50%-75%-50% of Iout(max): dI/dt = 5 A/s; 1 ms/div). Load cap: 470 F, 15 mW ESR electrolitic capacitor. Top trace: Vout (500 mV/div). Bottom trace: Iout (10 A/div).
Figure 13
source impedance
4.7 H
Figure 12 Figure 14
iS
VSOURCE
iC
DC/DC Converter 1 F
VOUT 15 F,
220 F, 0.2W ESR
electrolytic capacitor
ceramic 100mW ESR capacitor tantalum capacitor
Figure 11: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 12), Input Reflected Ripple Current (Figure 13) and Output Voltage Ripple (Figure 14).
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Figure 12: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 4.7 H source impedance and 220 F electrolytic capacitor (1 A/div; 2 s/div). See Figure 11.
Doc.# 005-2HZ612J Rev. D 06/12/09 Page 7
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Technical Specification
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Figure 13: Input reflected ripple current, is, through a 4.7 H source inductor, using a 220 F input capacitor, at nominal input voltage and rated load current (10 mA/div; 2 s/div). See Figure 11.
Figure 14: Output voltage ripple at nominal input voltage and rated load current (50 mV/div; 2 s/div). Load capacitance: 1 F ceramic capacitor and 15 F tantalum capacitor. Bandwidth: 20 MHz. See Figure 11.
Figure 15: Output voltage response to step-change in input voltage (35 V to 75 V in 300 s; 1 ms/div). Load cap: 470 F, 15 mW ESR electrolitic capacitor. Top trace: Vout (500 mV/div). Bottom trace: Vin (10 V/div), at zero load current.
16 14 12
Figure 16: Load current (10 A/div; 10 ms/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit.
Output Voltage (V)
10 8 6 4 2 0 -25 -15 -5 5 15 25 35 45 55 65 36Vin 48Vin 75Vin
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves and OVP shutdown point.
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Technical Specification
BASICOPERATIONANDFEATURES
The PowerQor Zeta series converter uses a two-stage power conversion topology. The first stage keeps the output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions 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 frequency 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 resistance, dissipate significantly less energy than Schottky diodes, enabling the PowerQor converter to achieve high efficiency. Dissipation throughout the converter is so low that it does not require a heatsink for operation. Since a heatsink is not required, the PowerQor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the heatsink. As an open frame module, the PowerQor converter can be built more simply and reliably using high yield surface mount techniquesonaPCBsubstrate. The PowerQor series of half-brick, quarter-brick and eighth-brick converters uses the industry standard footprint and pin-out configuration.
Input: Output: Current: Package:
CONTROLFEATURES
35-75 V 12 V 50 A (600W) Half-brick
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,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(-). The converter is available with either positive or negative logic used fortheON/OFFinput. In the positive logic version, the ON/OFF input is active high (meaning that a high voltage turns the converter on). In the negativelogicversion,theON/OFFsignalisactivelow(meaning that a low voltage turns the converter on).FigureAdetailsfive possiblecircuitsfordrivingtheON/OFFpin. REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter's output pins to the load. Pin 7 should be connected to Vout(+) and Pin 5 should be connected to Vout(-) at the point on the board where regulation isdesired.Iftheseconnectionsarenotmade,theconverterwill deliver an output voltage that is slightly higher than its specified value. Note: The output over-voltage protection circuit senses the voltage across the sense leads (pins 7 and 5) to determine when it should trigger, not the voltage across the converter's output pins(pins8and4). OUTPUT VOLTAGE TRIM (Pin 6):TheTRIMinputpermitsthe usertoadjusttheoutputvoltageacrossthesenseleadsupor down according to the trim range specifications. SynQor uses industry standard trim equations. To decrease the output voltage, the user should connect a resistorbetweenPin6(TRIM)andPin5(SENSE(-)input).For a desired decrease of the nominal output voltage, the value of theresistorshouldbe:
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Remote Enable Circuit
Vin(_)
Negative Logic (Permanently Enabled)
Vin(_)
Positive Logic (Permanently Enabled)
Rtrim-down =
where
ON/OFF
CMOS
5V ON/OFF
100% (D ) _ 2
kW
D% =
Vnominal-Vdesired Vnominal
x100%
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
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Technical Specification
To increase the output voltage, the user should connect a resistorbetweenPin6(TRIM)andPin7(SENSE(+)input).For a desired increase of the nominal output voltage, the value of the resistor should be
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Rtrim- =
up
( Vnominal -2 ) x V 1.225
productlifetime.TheOVPtrippointissetabovethislevel,so it will not shut down from output overvoltage protection when trimmed up between 5% and 10%. Continuous operation of thisconverterwhiletrimmedupmorethan5%couldaffectlong term reliability. 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.
DES+VNOM
VDES-VNOM
kW
FigureBgraphstherelationshipbetweenthetrimresistorvalue, Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
PROTECTIONFEATURES
Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping to avoid an input system instability problem, which is described in more detail in the application note titled "Input System Instability" on the SynQor website. The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical "Turn-On Voltage Threshold" value* 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:Iftheoutputcurrentexceedsthe"Output DCCurrentLimitInception"point*,thenafastlinearcurrentlimit controller will reduce the output voltage to maintain a constant output current. If as a result, the output voltage falls below the "Output DC Current Limit Shutdown Voltage"* for more than 50ms, then the unit will enter into hiccup mode, with a 500ms off-time. The unit will then automatically attempt to restart.
0 10,000.0
5
10
15
20
25
30
35
40
45
50
1,000.0
Trim Resistance (kOhms)
100.0
10.0
1.0
0.1
0.0
% Increase in Vout
% Decrease in Vout
Figure B: Trim Graph for 12Vout module
Note:TheTRIMfeaturedoesnotaffectthevoltageatwhichthe output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. ItisnotnecessaryfortheusertoaddcapacitanceattheTrim pin. The node is internally filtered to eliminate noise. Limited 10% up-trim:Thisconverteriscapableofoperating for an indefinite period of time with the output trimmed up to 5% above the nominal 12V output level*. It may also be trimmeddownbyasmuchas50%(to6.0V)indefinitely. This converter is also capable of being trimmed up by as much as 10% (up to 13.2V) for shorter periods of time that are not asignificantfractionoftheproductlifetime.Forexample,ina test situation, or for output voltage margining where it would remaintrimmedupbetween5%and10%ofthenominalvoltage for a few hundred hours, but not for an indefinite period or the
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Back-Drive Current Limit: If there is negative output current of a magnitude larger than the "Back-Drive Current Limit while Enabled"specification*,thenafastback-drivelimitcontrollerwill increase the output voltage to maintain a constant output current. Ifthisresultsintheoutputvoltageexceedingthe"OutputOverVoltageProtection"threshold*,thentheunitwillshutdown.The fullI-VoutputcharacteristicscanbeseeninFigure17. Output Over-Voltage Limit: If the voltage directly across the output pins exceeds the "Output Over-Voltage Protection" threshold*, the converter will immediately stop switching. This shutdownislatching;unlikeothershutdowntypes,theconverter willnotrestartunlesstheinputpoweriscycledortheON/OFF input is toggled. 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 whenthetemperatureatthesensedlocationreachesthe"OverTemperature 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*. * See Electrical Characteristics page.
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Technical Specification
APPLICATIONCONSIDERATIONS
Limited Output Voltage Resolution: The internal voltage control feedback loop has limited resolution. Therefore, the output voltage will exhibit discrete steps as the loop responds to changes in line, load, trim, or remote sense. For instance, on close examination,thestartupramphasa"stair-step"shape.Likewise, a load transient response will be composed of multiple discrete steps. The size of each step is well determined, and is shown in FigureC.Aclose-uppictureofasinglestepisshowninFigureD. Stepping will not occur under steady state conditions. Current share and active trim not recommended: It is important to note that external feedback control using the sense or trim pins will cause sustained stepping. External current share or active trim circuits contain a separate reference voltage.
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
After this external feedback has taken control, the actual output voltage can still differ from the external reference voltage by as muchasthestepsize.Iftheexternalfeedbackloopintegrates thiserrorvoltage,itwillcausealimitcycleoscillation.Forthis reason, external feedback using the sense and trim pins is not recommended. Input System Instability:Thiscondition 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.
140 120
Vout Step Size (mV)
100 80 60 40 = 12.0 Vout 20 0 35 40 45 50 55 60 65 70 75 = 10.0 Vout
8.75 Vout
Vin (V)
Figure C: Output voltage resolution.
Figure D: Smallest possible Vout step at 48Vin and 12Vout.
* See Electrical Characteristics page.
Product # PQ60120HZX50 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HZ612J Rev. D 06/12/09 Page 11
Technical Specification
Application Circuits:FigureEbelowprovidesatypicalcircuit diagram which details the input filtering and voltage trimming. Input Filtering and External Input Capacitance: Figure F below shows the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the InputCharacteristicssectionontheElectricalSpecificationspage. Moredetailedinformationisavailableintheapplicationnotetitled "EMICharacteristics"ontheSynQorwebsite.
Input: Output: Current: Package:
35-75 V 12 V 50 A (600W) Half-brick
Output Filtering and External Output Capacitance:Figure Fbelowshowstheinternaloutputfiltercomponents.Thisfilter dramatically reduces output voltage ripple. However, some minimum external output capacitance is required, as specified in theOutputCharacteristicssectionontheElectricalSpecifications page.Nodamagewilloccurwithoutthiscapacitorconnected, but peak output voltage ripple will be much higher.
Vin
External Input Filter
Electrolytic Capacitor ESR @0.2W
Vin(+)
Vout(+) Vsense(+) Rtrim-up
or
220F
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure E: Typical application circuit (negative logic unit, permanently enabled).
Lin
Vin(+) C1 Vin(_) C2
Regulation Stage Isolation Stage
Vout(+)
Current Sense
Vout(_)
Figure F: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # PQ60120HZX50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's dc-dc converters follows the format shown in the example below.
PQ 6 0 1 2 0 H Z A 5 0 N N S - G 6/6 RoHS Options (see Ordering Information) Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family
Thermal Design A - Open Frame B - Baseplate
Input: Output: Current: Package:
ORDERING INFORMATION
35-75 V 12 V 50 A (600W) Half-brick
The tables below show the valid model numbers and ordering optionsforconvertersinthisproductfamily.Whenordering 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. Add"-G"tothemodelnumberfor6/6RoHScompliance.
Model Number PQ60120HZw50xyz-G PQ55530HZw12xyz-G Input Voltage 35-75 V 38-55 V Output Voltage 12 V 53 V Max Output Current 50 A 11.5 A
The following options must be included in place of the x y z spaces in the model numbers listed above.
Options Description: x y z Enable Logic P - Positive N - Negative Pin Style K - 0.110" N - 0.145" R - 0.180" Y - 0.250" Feature Set
The first 12 characters comprise the base part number and the last 3 characters indicate available options. The "-G" suffix indicates 6/6 RoHS compliance.
S - Standard
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
RoHS Compliance:TheEUledRoHS(RestrictionofHazardous Substances)DirectivebanstheuseofLead,Cadmium,Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and PolybrominatedDiphenylEther(PBDE)inElectricalandElectronic Equipment. This SynQor product is 6/6 RoHS compliant. For more information 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.
Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options. Many operational functions of this converter are programmable. Contact the factory regarding customizing.
PATENTS
SynQor holds the following patents, one or more of which mightapplytothisproduct: 5,999,417 6,594,159 6,927,987 7,119,524 6,222,742 6,731,520 7,050,309 7,269,034 6,545,890 6,894,468 7,072,190 7,272,021 6,577,109 6,896,526 7,085,146 7,272,023
Contact SynQor for further information:

Phone: TollFree: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155SwansonRoad Boxborough,MA01719 USA
Phone 1-888-567-9596
Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. InformationfurnishedbySynQorisbelievedtobeaccurateandreliable. 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 fromitsuse.Nolicenseisgrantedbyimplicationorotherwiseunderany patent or patent rights of SynQor.
Product # PQ60120HZX50
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 13

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