Features
Simpleprimarysidecontrolsolutiontoenablehalf-bridgeDC-Bus
Convertersfor48Vdistributedsystemswithreducedcomponent
countandboardspace
Integrated50%dutycycleoscillator&half-bridgedriver
ICinasingleSO-8package
Programmableswitchingfrequencywithupto500kHz
maxperchannel
+/-1Adrivecurrentcapabilityoptimizedforlowcharge
MOSFETs
AdjustabLEDead-time50ns–200ns
Floatingchanneldesignedforbootstrapoperationupto
+100Vdc
Highandlowsidepulsewidthmatchingto+/-25ns
Adjustableovercurrentprotection
Undervoltagelockoutandinternalsoftstart
AlsoavailableLeadfree
Description
TheIR2085Sisaself-oscillatinghalf-bridgedriverICwith50%dutycycleideallysuitedfor36V– 75Vhalfbridge
DC-busconverters.
Thisproductisalsosuitableforpush-pullconverterswithoutrestrictiononinputvoltage.
EachchannelfrequencyisequaltofOSC,whichcanbesetbyselectingRT&CT,wherefOSC=1/(2*RT.CT).
Dead-timecanbecontrolledthroughproperselectionofCTandcanrangefrom50nsto200ns.Internal
soft-startincreasesthepulsewidthduringpowerupandmaintainspulsewidthmatchingforthehighand
lowoutputsthroughoutthestartupcycle.TheIR2085Sinitiatesasoftstartatpowerupandafterevery
overcurrentcondition.UndervoltagelockoutpreventsoperationifVCCislessthan7.5V