Datasheet

LT3796/LT3796-1
31
3796fa
For more information www.linear.com/3796
TYPICAL APPLICATIONS
Solar Panel Driven SLA Battery Charger with Maximum Power Point Tracking
I
CHARGE
vs V
IN
V
IN
(V)
1.2
37961 TA09b
20 30 35 4025
0.4
0.2
0
0.6
0.8
1.0
I
CHARGE
(A)
CSNV
IN
V
S
CSP
RT
V
C
FAULT
LT3796
37961 TA09a
CTRL
CSOUT
FB2
PWM
TG
M1: VISHAY SILICONIX Si7456DP
M2: VISHAY SUD19P06-60-E3
M3: ZETEX ZXM61N03F
L1: COILCRAFT MSD1260-333
D1: ON SEMI MBRS260T3G
D2: CENTRAL SEMI CMDZ15L
R9: MURATA NCP18XH103F03RB
V
REF
ISMON
SYNC
SS
EN/UVLO
FB1
OUT
ISP
ISN
INTV
CC
INTV
CC
FAULT
GATE
SENSE
GND
L1A 33µH
OUT
R
SNS1
250mΩ
R10
30.1k
L1B
WÜRTH SOLAR PANEL
V
OC
= 37.5V
V
MPP
= 28V
D1
1:1
R
T
19.6k
400kHz
R
C
499Ω
C
C
22nF
C4
0.1µF
C3
0.1µF
CSOUT
C1
4.7µF
50V
V
IN
BAT
C2
10µF
BAT
V
CHARGE
= 14.6V
V
FLOAT
= 13.5V
AT 25°C
BAT
R9
10k
NTC
•
R5
137k
INTV
CC
R4
301k
+
R11
93.1k
R
SNS
15mΩ
M1
M3
R12
10.2k
R8
113k
R3
20k
R2
475k
M2
D2
15V
R6
100k
R1
10k
C6
2.2µF 100V
•
C6
0.1µF
VMODE VMODE
R7
49.9k
R12
49.9k
C5
4.7µF