LT3492
22
3492fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2009
LT 0410 REV A • PRINTED IN USA
TYPICAL APPLICATION
Triple Buck-Boost Mode 100mA × 4 LED Driver
3000:1 PWM Dimming at 100Hz
PV
IN
10V TO 16V
2.2nF
3492 TA06
SW1 SW2
PV
IN
LT3492
GND
SW3
ISP1-3
ISN1-3
V
IN
PWM1-3
SHDN
V
IN
5V TO 16V
C8
1µF
4 LEDs
100mA
3.9M
100k
OVP3
18.2k
ISN3
TG3
1
L1
22µH
L2
22µH
L3
22µH
ISP3
ISN2
1
ISP2
C2
0.1µF
C4
0.1µF
C6
0.1µF
C5
1µF
PV
IN
C3
1µF
PV
IN
C7
1µF
ISN1
D1 D2 D3
1
ISP1
3.9M
100k
OVP2
3.9M
100k
OVP1
C1
2.2µF
4 LEDs
100mA
TG2TG1
4 LEDs
100mA
M1 M2 M3
C1: MURATA GRM31MR71E225KA93
C2, C4, C6: MURATA GRM21BR71H104KA01B
C3, C5, C7: MURATA GRM31MR71H105KA88
C8: MURATA GRM31MR71E105KA93
D1-D3: ROHM RB160M-60
L1-L3: TDK VLF5014AT-220MR62
M1-M3: ZETEX ZXMP6A13F
FADJ
TG1-3
OVP1-3
V
C1-3
V
REF
CTRL1-3
150k
49.9k
1.3MHz
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SD
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SD
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SD
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®
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I
SD
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PWM
5V/DIV
I
L
0.5A/DIV
I
LED
0.1A/DIV
1µs/DIV
3492 TA06b
