 English |
|
|
|
|
|
|
|
| LM3424 Datasheet, PDF (53/69 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs | |||
| |||
| ◁ |
www.ti.com
8.2.6 Buck-Boost Application
10V ± 70V
VIN
CIN
L1
LM3424, LM3424-Q1
SNVS603C â AUGUST 2009 â REVISED AUGUST 2015
D1
RUV2
RUV1
1
VIN
LM3424
20
HSP
RHSP
2
EN
19
HSN
RHSN
CCMP
3
COMP
18
SLOPE
RSLP
RCSH
4
CSH
17
IS
RT
5
RT/SYNC
RUVH
6
nDIM
16
VCC
CBYP
15
GATE
CSS
7
SS
14
GND
RGAIN
8
TGAIN
13
DDRV
500 mA
ILED
COUT
DIM
Q2
CFS
RFS
RSNS
VIN
RF
RPU
Q1
Q7
CF
DIM
ROV2
Q6
Q4
RSER
CB D2
Q5
VIN
RREF1
CREF
9
TSENSE
10
TREF
DAP
12
OVP
11
VS
RREF2
RBIAS
COV
ROV1
Q3
PWM
CNTC
8.2.6.1 Design Requirements
⢠Input: 10 V to 70 V
⢠Output: 6 LEDs at 500 mA
⢠PWM Dimming up to 10 kHz
⢠5-s Fade-up
⢠MOSFET RDS-ON Sensing
⢠700-kHz Switching Frequency
Figure 44. Buck-Boost Application
Copyright © 2009â2015, Texas Instruments Incorporated
Product Folder Links: LM3424 LM3424-Q1
Submit Documentation Feedback
53
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese