 English |
|
|
|
|
|
|
|
| LM3424 Datasheet, PDF (51/69 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs | |||
| |||
| ◁ |
www.ti.com
LM3424, LM3424-Q1
SNVS603C â AUGUST 2009 â REVISED AUGUST 2015
8.2.5 Boost Application
18V ± 38V
D1
VIN
CIN
L1
VCC
VS
Q3
Q4
RMAX
Q2
RADJ
RBIAS2
RCSH
RUV2
RUV1
1
VIN
LM3424
20
HSP
RHSP
2
EN
19
HSN
RHSN
CCMP
3
COMP
18
SLOPE
RSLP
CFS
RFS
RSNS
4
CSH
RT
5
RT/SYNC
6
nDIM
CSS
7
SS
RGAIN
8
TGAIN
17
IS
VCC
16
VCC
CBYP
15
GATE
700 mA
ILED
Q1
14
GND
RLIM
13
DDRV
COUT
ROV2
RREF1
CREF
9
TSENSE
10
TREF
DAP
12
OVP
11
VS
VS
RREF2
RBIAS
COV
ROV1
CNTC
NTC
8.2.5.1 Design Requirements
⢠Input: 18V to 38V
⢠Output: 12 LEDs at 700mA
⢠85°C - 125°C Thermal Foldback
⢠Analog Dimming
⢠700 kHz Switching Frequency
Figure 43. Boost Application
Copyright © 2009â2015, Texas Instruments Incorporated
Product Folder Links: LM3424 LM3424-Q1
Submit Documentation Feedback
51
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese