ir51h320 International Rectifier Corp., ir51h320 Datasheet - Page 5

• Manufacturer Part Number: ir51h320
• Description: Self-oscillating Half Bridge
• Manufacturer: International Rectifier Corp.

Functional Block Diagram
Lead Definitions
Symbol
V
R
C
V
V
VO
COM
CC
B
IN
T
T
V c c
C
R
i n c o r p o r a t e d i n I R 5 1 H D X X X o n l y
T
T
Logic and low side of half bridge return
Lead Description
Logic and internal gate drive supply voltage. An internal zener clamp diode at 15.6 V norminal is included
to allow the V
Oscillator timing resistor output; a resistor is connected from R
bridge output (VO).
Oscillator timing capacitor input; a capacitor is connected from C
oscillator frequency according to the following equation:
C
output stage.
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
F a s t r e c o v e r y d i o d e D 1 i s
T
PIN also invokes shutdown function (see note 2) where 75 is the effective impedence of the R
1
2
3
CC
CC
D 1
to be current fed directly from VIN typically by means of a high value resistor.
to V
B
. (HD type circuits incorporate this diode).
f
I R 2 1 5 1
1 4
. × (
V
B
6
R
T
1
H
V
75
L
O
S
O
) ×
C
T
T
C O M
V I N
to C
T
to COM in order to program the
9
4
T
. RT is out of phase with the half-
I R F C X X X
I R F C X X X
IR51H(D)224
IR51H(D)320
IR51H(D)420
7
V O
T