ir51hd320 International Rectifier Corp., ir51hd320 Datasheet - Page 4

• Manufacturer Part Number: ir51hd320
• Description: Self-oscillating Half-bridge
• Manufacturer: International Rectifier Corp.

IR51HD320
Functional Block Diagram
Lead Definitions
Symbol
V
R
C
V
V
VO
COM
CC
B
IN
T
T
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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
CC
is the effective impedance of the R
T
T
1
2
3
CC
to V
B
.
IR2151
f
V
B
6
1 4
. × (
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Index
Lead
Description
R
T
T
output stage.
1
IRFC320
IRFC320
75
) ×
IN
typically by means of a high value
C
COM
T
T
V +
to C
9
4
T
T
to COM in order to program
. R
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T
7
is out of phase with
VO