Datasheet

C
O
D1
R
OV2
R
OV1
2.5A
I
LED
R
SNS
R
FS
C
FS
C
OV
Q5
V
IN
15V ± 60V
Q1
OVP
nDIM
LM3423
AGND
V
IN
PGND
DDRV
DAP
GATE
EN
COMP
VIN
CSH
RCT
IS
HSP
RPD
VCC
HSN
C
BYP
C
CMP
R
T
R
UV2
R
UV1
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
R
HSN
R
HSP
C
T
C
IN
FLT DPOL
9 12
TIMR LRDY
10 11
R
CSH
L1
V
IN
C
TMR
R
FLT
R
PU
D2
Q2
RPD
RPD
External
Enable
LM3421, LM3421-Q1
LM3423, LM3423-Q1
SNVS574E –JULY 2008–REVISED MAY 2013 www.ti.com
DESIGN #7 - LM3423 BUCK-BOOST Application
Features
• Input: 15V to 60V
• Output: 8 LEDs at 2.5A
• Fault Input Disconnect
• Zero Current Shutdown
• 500 kHz Switching Frequency
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Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1