.
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C
T
Zener clamped Vcc for offline operation
Half-bridge output is out of phase with R
T
f
=
Description
The IR51HD214 is a high voltage, high speed, self-
oscillating half-bridge. Proprietary HVIC and latch
immune CMOS technologies, along with the
HEXFET
廬
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 250 volts.
Package
IR51HD214
9506
Typical Connection
U P TO 250V D C B U S
V IN
IR 5 1 H D 2 1 4
1
V
C C
V
B
6
2
R
T
V IN
9
R T
3
C
T
V O
7
C T
4
C O M
TO LO A D
C O M
To Order