Datasheet
LTC4000-1
34
40001fa
For more information www.linear.com/LTC4001-1
Typical applicaTions
V
–
V
+
LM234
R
6-CELL
LEAD-ACID
BATTERY
210k
14.7k
Si7135DP
47nF
15mΩ
V
OUT
13.5V
BSC123NO8NS3
BAS521
1N4148
B160
0.1µF
WÜRTH ELEKTRONIC
74435561100
10µH
13.0k
CSN
CSP
BGATE
IGATE
BAT
OFB
FBG
BFB
NTCCX
LTC4000-1
ITH
BIAS
CC IID
442k
CHRG
2.4k
20mΩ
3mΩ
LT3845A
SENSE
+
BURST_EN
SENSE
–
33µF
×3
RST
CLN
IN
SW
BG
BOOST
V
CC
ENC
V
FB
V
C
SHDN
C
SS
f
SET
F LT
VM
IFB
IIMON IBMON
20k
CL TMR
GND BIAS
BIAS
1µF
3.0V
1.10M
100k
348k
10nF10nF
10M
1µF
40001 F29
BSC123NO8NS3
TG
182k
47µF
2.2µF
1µF
16.2k
V
IN
1.5nF
49.9k
SYNC
SGND
8.66k
R
LM234
V
+
V
–
SOLAR PANEL INPUT
<40V OPEN CIRCUIT VOLTAGE
17.6V PEAK POWER VOLTAGE
1k
Figure 29. Solar Panel Input, 6-Cell Lead-Acid, 3-Step Battery Charger with 3.3A Bulk Charge Current, 14.1V at 25°C Absorption Voltage and 13.5V at
25°C Float Voltage. Temperature Compensation of Battery Float Voltage at –19.8mV/°C. Temperature Compensation of Solar Panel Input V
MP
at –78mV/°C
with V
MP
= 17.6V at 25°C