IR51H214 International Rectifier, IR51H214 Datasheet - Page 4

• Manufacturer Part Number: IR51H214
• Description: SELF-OSCILLATING HALF-BRIDGE
• Manufacturer: International Rectifier

IR51H214
Functional Block Diagram
Lead Definitions
Symbol
V
R
C
V
V
VO
COM
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CC
B
IN
T
T
Logic and internal gate drive supply voltage. An internal zener clamp diode at 15.6 V nominal is
included to allow the Vcc to be current fed directly from V
resistor.
Oscillator timing resistor input; a resistor is connected from R
the half-bridge output (VO).
Oscillator timing capacitor output; a capacitor is connected from C
the oscillator frequency according to the following equation:
where 75
High side gate drive floating supply. For bootstrap operation a high voltage fast recovery diode is
needed to feed from V
High voltage supply.
Half-bridge output.
Logic and low side of half-bridge return.
V
R
C
C C
T
T
1
2
3
is the effective impedance of the R
CC
to V
B
.
IR 2 1 5 1
V
f
B
To Order
6
1 4
. × (
Index
Lead
Description
R
T
T
output stage.
1
IR F C 2 1 4
IR F C 2 1 4
75
) ×
IN
typically by means of a high value
C
T
T
to C
C O M
V IN
T
T
9
4
to COM in order to program
. R
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T
is out of phase with
7
V O