sync and inhibit

derating Output pOwer/current and input vOltage

recOmmended Operating cOnditiOns

absOlute maximum ratings

typical characteristics

output power

•60to70wattsdependingonmodel

Lead soldering temperature (10 sec per lead)

•300°C

storage temperature range (case)

•–55°Cto+125°C

output Voltage temperature coefficient

•150ppm/°C,typical

input to output capacitance

•160pF,typical

isolation

•100megohmminimumat500V

conversion Frequency

•Freerunmode245kHz,typical

inhibit pin Voltage (unit enabled)

•4.5to5.5V

sync in (245 to 370 kHz.)

•Dutycycle70%min,98%max.

•Logiclow0.8Vmax

•Logichigh4.5Vmin

•Referencedtoinputcommon

•Ifsyncisnotused,leaveunconnected

inhibit ttL open collector

•Logiclow(outputdisabled)

Inhibit pin current 1 mA max

•Referencedtoinputcommon

•Logichigh(outputenabled)

V=≥4.5V

temperatures are referenced to the temperature at the converter’s base-

plate

•Linearlyderateoutputpower/currentfrom100%at85°Cto0%at125°C.

•Above105°Clinearlyderatesteadystateinputvoltageto33voltsat125°C.

•Indefiniteshortcircuitprotectionisnotguaranteedabove85°Ccase.

•Operationbelowaninputvoltageof19volts,includingoperationinmIL-

STd-704E emergency power conditions, is possible with derated output

power. See Figures 10 and 11.

input Voltage range

•19to40VDCcontinuous(seeDerating)

case operating temperature (tc)

•–40°Cto+85°Cfullpower

mFwSeRIeS

70 WATT

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