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LM3421 Datasheet(PDF) 53 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) 53 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
www.ti.com
SNVS574F – JULY 2008 – REVISED JULY 2015
8.2.5 LM3423 Boost Application
Figure 40. LM3423 Boost Application
8.2.5.1 Design Requirements
•
Input: 18 V to 38 V
•
Output: 12 LEDs at 700 mA
•
High Side PWM Dimming up to 30 kHz
•
Analog Dimming
•
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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