Texas Instruments LM3423 Evaluation Board LM3423BBLSCSEV/NOPB LM3423BBLSCSEV/NOPB Datenbogen
Produktcode
LM3423BBLSCSEV/NOPB
C
O
D1
R
OV2
R
OV1
500 mA
I
LED
R
SNS
R
FS
C
FS
C
OV
Q5
V
IN
10V
±
70V
Q7
Q6
Q4
D2
V
IN
DIM
R
PU
R
SER
DIM
C
B
C
F
R
F
Q2
Q1
PWM
OVP
nDIM
LM3421
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
16
15
14
13
12
11
10
9
R
HSN
R
HSP
Q3
C
T
C
IN
R
CSH
R
UVH
L1
C
CSH
External
Enable
C
EN
Q8
RCT
RCT
Q9
SNVS574E – JULY 2008 – REVISED MAY 2013
DESIGN #5 - LM3421 BUCK-BOOST Application
Features
•
Input: 10V to 70V
•
Output: 6 LEDs at 500mA
•
PWM Dimming up to 10 kHz
•
Slow Fade Out
•
MosFET R
DS-ON
Sensing
•
700 kHz Switching Frequency
52
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