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| LM3424 Datasheet, PDF (59/69 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs | |||
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www.ti.com
8.2.9 SEPIC Application
9V ± 36V
VIN
CIN
L1
RUV2
1
VIN
LM3424
20
HSP
RHSP
2
EN
19
HSN
RHSN
CCMP
3
COMP
18
SLOPE
RSLP
LM3424, LM3424-Q1
SNVS603C â AUGUST 2009 â REVISED AUGUST 2015
CSEP
D1
L2
CFS
RFS
RSNS
RCSH
4
CSH
RT
5
RT/SYNC
RUVH
6
nDIM
17
IS
16
VCC
CBYP
15
GATE
750 mA
ILED
Q1
COUT
RUV1
CSS
7
SS
14
GND
RLIM
RGAIN
8
TGAIN
13
DDRV
Q2
ROV2
RREF1
CREF
9
TSENSE
10
TREF
DAP
12
OVP
11
VS
RREF2
RBIAS
COV
ROV1
Q3
PWM
CNTC
NTC
Figure 47. SEPIC Application
8.2.9.1 Design Requirements
⢠Input: 9 V to 36 V
⢠Output: 5 LEDs at 750 mA
⢠60°C to 120°C Thermal Foldback
⢠PWM Dimming up to 30 kHz
⢠500-kHz Switching Frequency
Copyright © 2009â2015, Texas Instruments Incorporated
Product Folder Links: LM3424 LM3424-Q1
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