SI9124 Datasheet, PDF (16/16 Pages) Vishay Siliconix – 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control

VIN_EXT
R1
90 kW
R5
10 kW
GND
+ _C1
1 mF
100 V
R27
1.4 kW
C10
4.7 mF
16 V
C29
470 pF
C9
1 mF
1
16
V_IN
V_CC2
2
Si9124
15
V_CC
OUT_A
3
V_REF
4
GND
14
PGND2
13
OUT_B
R6
35 kW
5
12
R_OSC
PGND
C30
200 - 800 pF _{EP SEC_SYNC 11}
6
7 _VINDET
SS ¹⁰
8 _CS1
9
C_S2
C11
1 nF
C14
22 nF
R7
2 kW
5, 6, 7, 8
4
Q1
Si4490DY 1, 2, 3
5, 6, 7, 8
4
Q2
Si4490DY _{1, 2, 3}
R10
2 kW
R12
0.01 W
C12
15 pF
R11
2 kW
C15
R14
+
C2
1 mF
+ ^C3
+ ^C4
15 mF 15 mF
100 V 100 V 100 V
1 nF
5, 6,
7, 8
3.3 W
4
1, 2,
3
PUSH - PULL
5, 6 T1 1, 2
Q3
Si4886DY
5, 6,
7, 8
4
1, 2,
3
D4
Q4
11, 30BQ040 Si4886DY
12
9, 10
D5
Q5
30BQ040 _Si4886DY
5, 6,
1, 2,
7, 8
3
3,4
7, 8 8:2:2
5, 6,
7, 8
4
1, 2,
3
Q6
4
Si4886DY
C16
R15
1 nF
3.3 W
D11
SMAJ12CA
R16
10 W
D8
DAS19
T3
LEP-9080
4
5
7, 8, 9
1:3
1, 2, 3
D6
MBR0520
D7
30BQ040
+
C22
47 mF
10 V
C23
+47 _mF
10 V
3.3 V
+
C24
47 mF
10 V
C32
+ _{10 mF}
6.3 V
VOUT
OUT_GND
R24
1 MW
6
5
C34
0.1 mF
U2
MOC207
V_{IN +} 1
2
V_IN -
7
C21
0.047 mF
T2
R19
2.2 kW
C28
1 nF
2:1
EP7
R26
5.6 kW
C25
33 nF
R18
300 kW
LOGIC
V_OUT
TX_OUT 5 V
OUT_P
OUT_N
GATE_A
GATE_B
V_AUX
GND
6
7
+
3
-
U3
2
LM7301 ₄
C26
0.1 mF
C27
0.1 mF
R25
2 kW
1
2
U4
LM4041C1M3 - 1.2
3
OUT_GND
2
Q7B
3
4
6
1
Q7A
Si3552DV ⁵
2
Q8B
3
4
6
1
Q8A
Si3552DV ⁵
R22
33 kW
+ ^C19
4.7 mF
16 V
C33
0.1 mF
R23
18.6 kW