Product # SQ60120QPA28 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2SQ612J Rev. A 08/21/08 Page 3
Input:
Output:
Current:
Package:
36-75 V
12 V
28 A
Quarter-brick
Technical Specification
Parameter
Min. Typ. Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
InputVoltage
Non-Operating 0 100 V Continuous
Operating 36 48 75 V Continuous
OperatingTransientProtection 100 V 100ms
IsolationVoltage(inputtooutput) 2000 V Basicinsulation,PollutionDegree2
OperatingTemperature -40 100
°C
StorageTemperature -55 125
°C
VoltageatON/OFFinputpin -2 18 V
INPUT CHARACTERISTICS
OperatingInputVoltageRange 36 48 75 V
InputUnder-VoltageLockout
Turn-OnVoltageThreshold 31 34 V
Turn-OffVoltageThreshold 28 32 V
LockoutVoltageHysteresis 2 4 V
InputOver-VoltageShutdown
Turn-OffVoltageThreshold 105 V Vinwhenunitwillshutdown
Turn-OnVoltageThreshold 95 V Vinwhenunitturnsonaftershutdownevent
MaximumInputCurrent 12 A 100%Load,35Vin
No-LoadInputCurrent 130 mA
DisabledInputCurrent 8.5 mA
InputReflected-RippleCurrent 7.5 14.0 mA RMSthrough10
µHinductor;Figures12&14
InputTerminal-RippleCurrent 600 1000 mA RMS,fullload;
Figures12&1
RecommendedInputFuse1 15 A Fastblowexternalfuserecommended
InputFilterComponentValues(C\L) 6.6\0.22
µF\µH Internalvalues
RecommendedExternalInputCapacitance 47
µF TypicalESR0.1-0.2
W
;seeFigure12
OUTPUT CHARACTERISTICS
OutputVoltageSetPoint 12.35 V 48Vin,noload
OutputVoltageRegulation
OverLine +0.48\-1.8 V Figure4
OverLoad +0\-0.6 V Figure4
OverTemperature ±300 mV Figure4
TotalOutputVoltageRange 10.6 12.7 V Oversample,line,load,temperature&life
OutputVoltageRippleandNoise2 20MHzbandwidth;Figures
12
&15
Peak-to-Peak 150 300 mV FullLoad;seeFigures
12
&15
RMS 40 100 mV FullLoad;seeFigures
12
&15
OperatingOutputCurrentRange 0 28 A Subjecttothermalderating;Figures5-8
OutputDCCurrent-LimitInception 35 A OutputVoltage10%Low;Figure16
OutputDCCurrent-LimitShutdownVoltage 7 V
Back-DriveCurrentLimitwhileDisabled 50 mA Negativecurrentdrawnfromoutput
MaximumOutputCapacitance 3,000 µF 12Voutat28AResistiveLoad
DYNAMIC CHARACTERISTICS
OutputVoltageduringLoadCurrentTransient
ForaStepChangeinOutputCurrent(0.1A/µs) 1500 2250 mV 50%to75%to50%Ioutmax;Figure11
SettlingTime 250 350 µs Towithin1%Voutnom
Turn-OnTransient
Turn-OnTime 8 10 ms Fullload,Vout=90%nom.;Figures9&10
Start-UpInhibitTime 200 ms -40°Cto+125°C;FigureE
OutputVoltageOvershoot 0 % 3mFloadcapacitance,Iout=0A
EFFICIENCY
100%Load 95 % Figure1
50%Load 95 % Figure1
TEMPERATURE LIMITS FOR POWER DERATING CURVES
SemiconductorJunctionTemperature 125 °C Packageratedto150°C
BoardTemperature 125 °C ULratedmaxoperatingtemp130°C
TransformerTemperature 125 °C SeeFigures
5-8
for derating curves
ISOLATION CHARACTERISTICS
IsolationVoltage(dielectricstrength) 2000 V
IsolationResistance 30 M
W
IsolationCapacitance
3
470 pF
SQ60120QPA28ELECTRICALCHARACTERISTICS
TA=25°C,airflowrate=300LFM,Vin=48Vdcunless otherwisenoted;fulloperatingtemperaturerangeis-40°Cto+100°C ambient
temperature with appropriate power derating.
Specificationssubjecttochangewithoutnotice.
Note1:UL’sproductcertificationtestswerecarriedoutusing15Afastblowfuse.Fuseinterruptioncharacteristicshavetobetakenintoaccountwhile
designinginputtraces.UsershouldensurethatInputtraceiscapableofwithstandingfaultcurrentsuntilfuseblows.
Note2:Forapplicationsrequiringreducedoutputvoltagerippleandnoise,consultSynQorapplicationssupport(e-mail:support@synqor.com)
Note3:Highervaluesofisolationcapacitancecanbeaddedexternaltothemodule.