Datasheet

LT3796/LT3796-1
27
3796fa
For more information www.linear.com/3796
SEPIC LED Driver Using FB2 for Input Overvoltage Protection
TYPICAL APPLICATIONS
Efficiency vs V
IN
V
IN
(V)
0
75
100
37961 TA04b
10
20 30 5040 60
80
70
85
95
90
EFFICIENCY (%)
CSPV
S
CSN
RT SYNC SS
V
C
VMODE
FAULT
R6
2k
22V
LED
LT3796
37961 TA04a
CTRL
FB2
CSOUT
PWM
PWM
OPTIONAL INPUT
CURRENT REPORTING
M1: VISHAY SILICONIX Si7456DP
M2: VISHAY Si7415DN
L1: COILTRONICS DRQ127-220
D1: DIODES INC PDS5100
LED: CREE XLAMP XR-E
ISMON
LED CURRENT REPORTING
EN/UVLO
V
REF
GND
FB1
ISP
ISN
TG
INTV
CC
INTV
CC
GATE
SENSE
C
C
10nF
L1A 22µH
R
SNS1
50mΩI
IN
D1
R
T
19.6k
400kHz
R
C
4.99k
V
IN
C5
4.7µF
C4
0.1µF
C7
0.1µF
R4
511k
R5
100k
8V TO 60V
V
IN
C2
10µF
×3
35V
C1
2.2µF
×3
100V
R11
40.2k
R
SNS
15mΩ
R
LED
250mΩ
UP TO
1A
M2
M1
L1B
R7
40.2k
C3
0.1µF
CSOUT
R10
909k
C6
2.2µF
100V
R3
20k
R2
75k
R1
953k
VMODE
FAULT
R8
100k
R9
100k
INTV
CC