Datasheet

LT3761
26
3761f
Boost PWM Dimming Waveform
I
LED
0.5A/DIV
5µs/DIV
PWM
3761 TA06b
V
IN
= 16V, V
LED
= 30V
I
LED
2A/DIV
5µs/DIV
PWM
3761 TA07b
V
IN
= 48V, V
LED
= 38V
Typical applicaTions
Buck Mode 5A LED Driver for 40kHz PWM Dimming
Boost LED Driver for 30kHz PWM Dimming
Buck Mode PWM Dimming Waveform
1µF
4.7nF
0.1µF
3k
20.5k
500kHz
V
IN
LT3761
L1
0.82µH
EN/UVLO
FB
V
REF
SENSE
100k
187k
C1
10µF
25V
C2
10µF
×2
35V
V
IN
8V TO
20V
39.2k
CTRL
6mΩ
M1
D1
M2
499k
17.8k
3761 TA06a
OPENLED
GND
ISP
ISN
GATE
PWMOUT
0.25Ω
1A
RT
V
C
DIM/SS
PWM
INTV
CC
L1: VISHAY IHLP2525CZ
D1: DIODES PDS1040CTL
M1: INFINEON BSC059N04
M2: VISHAY Si2318CDS
1µF
4.7nF
0.1µF
22k
16.9k
600kHz
V
IN
LT3761
EN/UVLO
FB
V
REF
ISP
SENSEGND
100k
340k
C2
2.2µF
×2
100V
C1
4.7µF
×4
50V
V
IN
44V TO 80V
10k
CTRL
50mΩ
2W
M1
UP TO
8 LEDS
4V TO 40V
3761 TA07a
OPENLED
ISN
GATE
M2PWMOUT
D2
5mΩ
0.5W
5A
RT
V
C
DIM/SS
PWM
INTV
CC
L1
1µH
158k
6.2V
0.22µF
10k
2.2nF
200k
1M
200k
D1
L1: WÜRTH 744331010
M1: INFINEON BSC123NO8NS3
M2: INFINEON BSC093NO4LS
D1: DIODES PDS5100
D2: CENTRAL SEMI CMSSH-3S
C1: TDK C4532X7R1H475
C2: TDK C3225X7R2A225
LED: CREE XLAMP XM-L (×7)
Q1: ZETEX FMMT593
VISHAY
Q1