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LT3743
TYPICAL APPLICATION
12V, 40A Pulsed LED Driver
EN/UVLO
PWM
CTRL_SEL
EN/UVLO
PWM
CTRL_SEL
V IN
4.7μF
× 8
220μF
220μF
V IN
12V
V IN = 12V
4A to 40A LED Current Step
V CC_INT
SENSE –
1μF
R HOT
499?
50k
R NTC
10k
50k
150k
1μF
1μF
RT HG
SYNC
CBOOT
V REF LT3743 SW
CTRL_L
LG
CTRL_H
GND
SENSE +
CTRL_T
PWMGH
220nF
22μF
33nF
M1
× 2
L1
1μH
M2
× 2
1.25m
10
10
C1
330μF
× 3
M3
OUTPUT
40A MAXIMUM
1μF
C3
330μF
× 3
M4
D1
CTRL_SEL
5V/DIV
I LED
20A/DIV
SW
10V/DIV
20μs/DIV
3743 TA08b
1μF
SS
PWMGL
140k
51k
5.6nF
V CL
FB
V CH
51k
5.6nF
1nF
L1: 1HLP5050FDER1R0M01
M1, M2: RJK0330DPB
M3, M4: Si7234DP
C1, C2, C3: PTPR33OM9L
C2
330μF
× 3
20k
3743 TA08
RELATED PARTS
PART NUMBER
LT3755/LT3755-1
LT3756/LT3756-1
LTC3783
LT3517
LT3518
LT3496
LT3474/LT3474-1
LT3475/LT3475-1
LT3476
LT3478/LT3478-1
DESCRIPTION
High Side 40V, 1MHz LED Controller with True Color
3000:1 PWM Dimming
High Side 100V, 1MHz LED Controller with True Color
3000:1 PWM Dimming
High Side 36V, 1MHz LED Controller with True Color
3000:1 PWM Dimming
1.3A, 2.5MHz High Current LED Driver with 3000:1
Dimming
2.3A, 2.5MHz High Current LED Driver with 3000:1
Dimming
Triple Output 750mA, 2.1MHz High Current LED Driver
with 3000:1 Dimming
36V, 1A (I LED ), 2MHz Step-Down LED Driver
Dual 1.5A (I LED ), 36V Step-Down LED Driver
Quad Output 1.5A, 2MHz High Current LED Driver with
1000:1 Dimming
4.5A, 2MHz High Current LED Driver with 3000:1
Dimming
COMMENTS
V IN : 4.5V to 40V, V OUT(MAX) = 60V, Dimming = 3000:1 True Color PWM?,
I SD < 1μA, 3mm × 3mm QFN16, MSOP16E
V IN : 6V to 100V, V OUT(MAX) = 100V, Dimming = 3000:1 True Color PWM,
I SD < 1μA, 3mm × 3mm QFN16, MSOP16E
V IN : 3V to 36V, V OUT(MAX) = 40V, Dimming = 3000:1 True Color PWM,
I SD < 20μA, 4mm × 5mm DFN16, TSSOP16E
V IN : 3V to 30V, Dimming = 3000:1 True Color PWM, I SD < 1μA,
4mm × 4mm QFN16
V IN : 3V to 30V, Dimming = 3000:1 True Color PWM, I SD < 1μA,
4mm × 4mm QFN16
V IN : 3V to 30V, V OUT(MAX) = 40V, Dimming = 3000:1 True Color PWM,
I SD < 1μA, 4mm × 5mm QFN28
V IN : 4V to 36V, V OUT(MAX) = 13.5V, Dimming = 400:1 True Color PWM,
I SD < 1μA, TSSOP16E
V IN : 4V to 36V, V OUT(MAX) = 13.5V, Dimming = 3000:1 True Color PWM,
I SD < 1μA, TSSOP20E
V IN : 2.8V to 16V, V OUT(MAX) = 36V, Dimming = 1000:1 True Color PWM,
I SD < 10μA, 5mm × 7mm QFN10
V IN : 2.8V to 36V, V OUT(MAX) = 40V, Dimming = 1000:1 True Color PWM,
I SD < 10μA, 5mm × 7mm QFN10
3743fd
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900   FAX: (408) ● www.linear.com ●
28 Linear Technology 434-0507 Corporation
LT 1112 REV D ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2009
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