SELF-OSCILLATING HALF BRIDGE

Features
• Output power MOSFETs in half-bridge configuration
• High side gate drive designed for bootstrap operation
• Bootstrap diode integrated into package (HD type)
• Tighter initial deadtime control
• Low temperature coefficient deadtime
• 15.6V zener clamped Vcc for offline operation
• Half-bridge output is out of phase with RT
• True micropower startup
• Shutdown feature (1/6th VCC) on CT lead
• Increased undervoltage lockout hysteresis (1Volt)
• Lower power level-shifting circuit
• Lower di/dt gate drive for better noise immunity
• Excellent latch immunity on all inputs and outputs
• ESD protection on all leads
• Constant VO pulse width at startup
• Heatsink package version (P2 type)

Description
The IR53H(D)420 are complete high voltage, high speed, self-oscillating half-bridge circuits. Proprietary HVIC and latch immune CMOS technologies, along with the HEXFET® power MOSFET technology, enable ruggedized single package construction. The front-end features a programmable oscillator which functions similar to the CMOS 555 timer.
The supply to the control circuit has a zener clamp to simplify offline operation. The output features two HEXFETs in a half-bridge configuration with an internally set deadtime designed for minimum cross-conduction in the half-bridge. Propagation delays for the high and low side power MOSFETs are matched to simplify use in 50% duty cycle applications. The device can operate up to the VIN (max)rating.

Product Summary
VIN (max) 500V
Duty Cycle 50%
Deadtime (type.) 1.2µs
Rds(on) 3.0Ω
PD (TA = 25oC) 2.0W or 3.0W