IRS27951SPBF Datasheet

Power Driver ICs


The IRS27951SPBF is a self oscillating half-bridge driver IC for DC-DC resonant converter applications, especially the LLC resonant half-bridge converter. The frequency and dead time can be programmed externally using two external components. The IC offers over current protection using the on state resistance of the low-side MOSFET. The IC can be disabled by externally pulling the voltage at the CT/SD pin below its enable voltage threshold IRS27951SPBF Features • Simple primary-side control solution for fixed and variable frequency DC-DC resonant converters.• Max 500kHz per channel output with 50% duty cycle• Floating channel bootstrap operation up to +600Vdc• Programmable minimum and maximum switching frequency• Programmable soft start frequency and soft start time • Programmable dead time• Micropower start-up & ultra low quiescent current• Over-current protection using low side MOSFET Rds(on)• User initiated micropower “Sleep mode” • Under-voltage Lockout• Simple design with minimal component count.• Lead-free IRS27951SPBF Applications • LCD & PDP TV• Telecom SMPS, PC SMPS• Home Audio Systems


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