The IRS27952SPBF is a self-oscillating Half-bridge Driver IC for DC-DC resonant converter. It 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. This double-ended controller for the resonant half-bridge topology and provides complementary outputs with 50% (max) duty cycle; the high-side and low-side bridge device is driven 180° out-of-phase for exactly the same time. A programmable dead-time inserted between the turn-off of one switch and the turn-on of the other one guarantees soft-switching operation. The IC incorporates a multi-function oscillator that allows the designer to program all the necessary features to control a half bridge resonant switch-mode power supply featuring low standby power.
Simple primary-side control solution for fixed and variable frequency DC-DC resonant converters
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 and ultra-low quiescent current
Over-current protection using low side MOSFET Rds(on)
(EN)
