Datasheet

1
2
6
3
4
5
8
7
16
15
11
14
13
12
9
10
OVP
CSH
COMP
EN
RCT
AGND
OVP
nDIM DDRV
GATE
Vcc
PGND
IS
RPD
HSP
HSN
RPD
RPD
J3
TP12
V
CC
V
IN
LED
(+)
R8
C13
LED
(-)
R
6
Q
1
R25
TP10
R20
R9
R7
C12
TP7
C2
U
1
V
IN
LM3421
C3
TP2
J
1
R17
R21
R13
C5
L1
CONN
2
C17
C1
R14
C8
V
IN
V
IN
P
GND
V
IN
TP8
R27
V
O
D1
C16
C7
C11
C4
R30
Q9
BNC
TP6
R31
V
IN
J5
V
CC
R23
R3
Q7
Q4
Q4
OVP
RPD
V
IN
C18
R22
Q3
V
O
V
O
R26
CONN
1
www.ti.com LM3421 Buck-Boost Design Example (High Side Current Sense & High Speed Dimming)
9 LM3421 Buck-Boost Design Example (High Side Current Sense & High Speed
Dimming)
Figure 13. LM3421 Design Example: High Side Current Sense with High Speed Dimming
15
SNVA376A–December 2008–Revised May 2013 AN-1907 LM3423 Buck-Boost Configuration Evaluation Board
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