SI9122 Datasheet, PDF (16/17 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers

V_CC
P1
V IN
1
36 − 72 V
P2
1
GND
R3
R1
90 kW
Q1
FMMT493
1
470 kW
R2
1 MW
V_CC
P3
1
AGND
1 ^JP1
2 SD
3 ^EN
R6
35 kW
3
2
R5
10 kW
R27
1 MW
Q2
FZT953
3
1
PNP
2
C1
1 mF
100 V
1 ^D1 3
BAS19
5.6
7, 8
4
Q3
1, 2, 3
Si4486EY
R2
10 W
1
V_IN
20
BST
2 nF
2 _{REG_COMP}
3 _VCC
D_H ¹⁹
L_X ¹⁸
C10
4.7 mF
16 V
C30
200 − 800 pF
R7
2 kW
C9
C29 _{4 VREF}
D_L ¹⁷
1 mF
10 V
470 pF
10 V
5 _GND
6 _ROSC
PGND ¹⁶
SR_H ¹⁵
C11
1000 pF
7 _EP
8 _VINDET
SR_L ¹⁴
SS ¹³
C12
15 pF
9 _CS1
10
CS2
BBM ¹²
11
CL_CONT
C13
4700 pF
C8
0.1 mF
5.6
7, 8
4
Q4
Si4486EY ^{1, 2, 3}
R8
5 kW
R9
27 kW
C14
4.7 nF
R10
V_IN
D2
10MQ100N
L_X
D3
10MQ100N
2 kW
R11
2 kW
R12
0.02 W
1_{/2 W}
SRH
SRL
V_CC
EP