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