ISO7731DBQR
VCC1
1
GND1
2
INA
3
INB
4
OUTC
5
NC
6
EN1
7
GND1
8
GND2
9
EN2
10
NC
11
INC
12
OUTB
13
OUTA
14
GND2
15
VCC2
16
U1
AGND
20
R2
TP3
TP2
TP1
5V_H
VM12V_H
VM12V_L
IN_L
5V
AGND
Aux Connector
Power Connector
HVBUS
ISO_RET_H
HVBUS
600V
D1
68pF
C6
ISO_12V_H
AGND
ISONC1
ISONC2
ISONC3
68pF
C7
68pF
C17
5V_H
5V_L
SW_L
FAULT_L
5V_L
ISO_RET_H
5V_H
SW_H
IN_H
49.9
R4
22pF
C3
49.9
R9
22pF
C18
5V-AI
20V
D3
DIODE_SCHOTTKY
20V
D2
DIODE_SCHOTTKY
16V
D4
49.9
R3
0.1uF
C20
ISONC4
4.7uF
C21
4.7uF
C23
4.7uF
C22
4.7uF
C24
ISO_12V_H_AO
ISO_12V_H_B
15k 100V/ns
15k 100v/ns
15k
R6
40.2k 60V/ns
0.1uF
C2
1uF
C1
475uH
1
2
5
6
4
3
T1
D1
1
D2
3
VCC
2
GND
4
EN
5
CLK
6
U2
SN6505
1
2
3
4
L3
ISO_RET_H
ISO_RET_H
ISO_RET_L
ISO_RET_L
ISO_RET_H_B
-ISO_RET_H_AO
0.022µF
C8
0.022µF
C9
0.022µF
C10
0.022µF
C11
0
R1
FAULT_H
15k
R8
12V
12V
4.7uF
C15
1uF
C19
1uF
C14
Bot_FET
1
2
J2
IN Pin on daughter board
1
2
J3
OUT Pin on daughter board
1
2
J4
Pin to J1
5V
AGND
1
2
J5
Pin for J3
ISO_RET_H
ISO_12V_H
AGND
12V
Bot_FET
Top_FET
Top_FET
5V
AGND
AGND
10µH
L1
10µH
L2
4.7uF
C4
FAULT_H
FAULT_L
0.047uF
C12
0.047uF
C13
40.2k 60V/ns
0.1uF
C5
0.1uF
C16
1
2
3
4
5
6
7
8
J1
0
R5
0
R7
ISO_RET_H
ISO_RET_H
ISO_RET_L
ISO_RET_L
ISO_RET_L
DRAIN
1
DRAIN
2
DRAIN
3
DRAIN
4
DRAIN
5
DRAIN
6
DRAIN
7
DRAIN
8
DRAIN
9
DRAIN
10
DRAIN
11
SOURCE
12
SOURCE
13
SOURCE
14
SOURCE
15
SOURCE
16
NC
17
SOURCE
18
SOURCE
19
SOURCE
20
SOURCE
21
SOURCE
22
SOURCE
23
SOURCE
24
LDO5V
25
VNEG
26
VDD
27
BBSW
28
LPM
29
RDRV
30
IN
31
FAULT
32
PAD
33
LMG3410R150RWHT
Q1
DRAIN
1
DRAIN
2
DRAIN
3
DRAIN
4
DRAIN
5
DRAIN
6
DRAIN
7
DRAIN
8
DRAIN
9
DRAIN
10
DRAIN
11
SOURCE
12
SOURCE
13
SOURCE
14
SOURCE
15
SOURCE
16
NC
17
SOURCE
18
SOURCE
19
SOURCE
20
SOURCE
21
SOURCE
22
SOURCE
23
SOURCE
24
LDO5V
25
VNEG
26
VDD
27
BBSW
28
LPM
29
RDRV
30
IN
31
FAULT
32
PAD
33
LMG3410R150RWHT
Q2
AGND_AI
Schematic
9
SNOU168 – June 2019
Copyright © 2019, Texas Instruments Incorporated
LMG3410R150-031 EVM User Guide
3
Schematic
Figure 6. LMG3410EVM-031 Schematic