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LM3421 Datasheet(PDF) 57 Page - Texas Instruments

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Part # LM3421
Description  N-Channel Controllers for Constant-Current LED Drivers
PDF  72 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3421 Datasheet(HTML) 57 Page - Texas Instruments

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RLIM
Q1
ROV1
COV
15V ± 50V
PWM
CO
D1
ROV2
1.25A
ILED
RSNS
RFS
CFS
Q2
D2
L1
Q4
RPU
CDIM
OVP
nDIM
LM3423
AGND
VIN
PGND
DDRV
DAP
GATE
EN
COMP
VIN
CSH
RCT
IS
HSP
RPD
VCC
HSN
CBYP
CCMP
RT
RUV2
RUV1
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
RHSN
RHSP
Q3
CT
CIN
FLT
DPOL
9
12
TIMR
LRDY
10
11
RCSH
RUVH
VIN
LED
STATUS
LIGHT
RPU2
RPD
RPD
External
Enable
LM3421, LM3421-Q1, LM3423, LM3423-Q1
www.ti.com
SNVS574F – JULY 2008 – REVISED JULY 2015
8.2.7 LM3423 Buck Application
Figure 42. LM3423 Buck Application
8.2.7.1 Design Requirements
•
Input: 15 V to 50 V
•
Output: 3 LEDs at 1.25 A
•
PWM Dimming up to 50 kHz
•
LED Status Indicator
•
Zero Current Shutdown
•
700-kHz Switching Frequency
Copyright © 2008–2015, Texas Instruments Incorporated
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Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1



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