Datasheet

LT3796/LT3796-1
30
3796fa
For more information www.linear.com/3796
TYPICAL APPLICATIONS
SEPIC Converter with R
WIRE
Compensation and Output Current Limit
Line Impedance Compensation Load Step Response
I
LOAD
(mA)
13.0
37961 TA08b
0 400 600 800 1000 1200200
11.0
10.5
10.0
11.5
12.5
12.0
V
OUT
/V
LOAD
(V)
V
OUT
V
LOAD
R
WIRE
= 0.5Ω
V
OUT
500mV/DIV
(AC)
37961 TA08c
500µs/DIV
I
OUT
500mA/DIV
200mA
800mA
GATE GNDV
IN
SENSE
RT
V
C
LT3796
37961 TA08a
PWM
SYNC
FB2
V
REF
L1: WÜRTH 744871220
D1: ZETEX ZLLS2000TA
M1: VISHAY SILICONIX Si4840DY
SS
CTRL
V
REF
EN/UVLO
ISMON
CSN
OUT
V
S
CSP
CSOUT
FB1
TG
INTV
CC
INTV
CC
ISP
ISN
L1A 22µH
L1B
M1
C2
10µF
OUT
R
WIRE
V
LOAD
12V, 1A CURRENT LIMIT
R
SNS1
250mΩ
12V
D1
1:1
C
C
10nF
R
T
19.6k
400kHz
R
C
24.9k
C6
4.7µF
C5
0.1µF
C8
0.1µF
C1
10µF
V
IN
C3
10µF
C4
100µF
25V
•
R
SNS
33mΩ
C7
1µF
•
R1
38.3k
R2
38.3k
R3
154k
R4
287k
R5
12.4k
+
VMODE
FAULT
VMODE
FAULT
R7
100k
R6
100k
INTV
CC