SELF-OSCILLATING HALF-BRIDGE
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Data Sheet No. PD-6.057D
IR51H737
SELF-OSCILLATING HALF-BRIDGE
Features
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Description
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Data Sheet No. PD-6.057D
IR51H737
SELF-OSCILLATING HALF-BRIDGE
Features
n n n n n n
Product Summary
VIN (max) Duty Cycle Deadtime RDS(on) PD (TA = 25 ºC) 300V 50% 1.2µs 0.75Ω 2.0W
Output Power MOSFETs in half-bridge configuration 300V Rated Breakdown Voltage High side gate drive designed for bootstrap operation Accurate timing control for both Power MOSFETs Matched delay to get 50% duty cycle Matched deadtime of 1.2us Internal oscillator with programmable frequency 1 1. 4 × (RT + 75 Ω ) × CT Zener clamped Vcc for offline operation Half-bridge output is out of phase with RT
f =
Description
The IR51H737 is a high voltage, high speed, selfoscillating half-bridge. 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 300 volts.
Package
IR51H737 9506
Typical Connection
U P V IN T O 3 0 0 V D C B U S
IR 5 1 H 7 3 7
1
V C C V B
6
2
R T V IN
9
R T 3
C T V O
7
C T...
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