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LM3421 Datasheet(PDF) 48 Page - Texas Instruments

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Part # LM3421
Description  N-Channel Controllers for Constant Current LED Drivers
PDF  65 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3421 Datasheet(HTML) 48 Page - Texas Instruments

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CO
D1
ROV2
ROV1
RSNS
RFS
CFS
COV
700 mA
ILED
RBIAS2
RMAX
Q7
Q5
RADJ
Q4
RCSH
VCC
18V ± 38V
OVP
nDIM
LM3423
AGND
VIN
PGND
DDRV
DAP
GATE
EN
COMP
VIN
CSH
RCT
IS
HSP
RPD
VCC
HSN
L1
CBYP
RLIM
Q1
CCMP
RT
RUV2
RUV1
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
RHSN
RHSP
CT
CIN
FLT
DPOL
9
12
TIMR
LRDY
10
11
VREF
VCC
Q6
D3
Q2
RPU
RSER
CDIM
RPD
RPD
External
Enable
Q3
PWM
RUVH
D2
LM3421, LM3421-Q1
LM3423, LM3423-Q1
SNVS574D – JULY 2008 – REVISED SEPTEMBER 2011
www.ti.com
DESIGN #4 - LM3423 BOOST Application
Features
•
Input: 18V to 38V
•
Output: 12 LEDs at 700mA
•
High Side PWM Dimming up to 30 kHz
•
Analog Dimming
•
Zero Current Shutdown
•
700 kHz Switching Frequency
48
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Copyright © 2008–2011, Texas Instruments Incorporated
Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1



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