+
12VDC-Port
-
23
4.7 µH
1 m
20
22
36
35
470 µF
PGND
6
19
2.2 µF
PGND
34
33
VIN
H
O
1
H
B
1
L
O
1
C
SA
1
C
SB
1
BRKG
BRKS
VCC
31
VCCA
24.9
1 µF
46
AGND
44
10
39
DIR
UVLO
EN1
43
EN2
40
AGND
42
ISETD
45
ISETA
SYNCIN
41
SYNCOUT
4
28
8
95.3 k
1 nF
VINX
RAMP1
RAMP2
14
0.22 µF
PGND
4.7 µH
1 m
17
15
1
2
PGND
H
O
2
H
B
2
L
O
2
C
SA
2
C
SB
2
9.09 k
ENABLE
DIR
ISETA
+
+10Vdc
-
1 nF
26
COMP1
11
COMP2
15 nF
634
VCC
VCC
1 nF
15 nF
634
1 nF
12
25
9
AGND
SS
OVPA
OVPB
48
DT
10 nF
10 k
51.1 k
54.9 k
30
IPK
40.2 k
29
OPT
37
IOUT1
38
IOUT2
9.09 k
10 k
47
OSC
40.2 k
10 nF
10 nF
AGND
24
SW
1
13
SW
2
0.22 µF
IOUT1
IOUT2
27
nFAULT
PGND
+
48VDC-Port
-
VCC
100 µF
100 µF
PGND
470 µF
LM5170-Q1
CMMD AND
MONITOR
C2
C1
C
HB1
Q
H1
Q
L2
C
VCC
C5
C
IOUT1
C
IOUT2
C8
C
HB2
C10
C
SS
C
HF1
C
COMP1
C
RAMP2
C
RAMP1
Q
H2
Q
L2
R
CS2
R
VCCA
R
OSC
R
SYNCO
R
IOUT1
R
IOUT2
R
IPK
R
OVPB
R
OVPA
R
DT
R
COMP1
R
RAMP2
R
RAMP1
R
BRK
D
HB1
D
HB2
18
PG
N
D
PGND
PGND
AGND
C
COMP2
R
COMP2
C
HF2
1 M
L
m1
R
CS1
L
m2
PGND
9
5
.3
k
95.3
NŸ
Setup
5
SNVU543A – November 2016 – Revised December 2016
Copyright © 2016, Texas Instruments Incorporated
LM5170-Q1 EVM User Guide
Figure 1. Simplified EVM Schematic