Datasheet

LTC4020
37
4020fd
For more information www.linear.com/LTC4020
Typical applicaTions
5V to 30V to 6-cell lead-acid PowerPath charger/system supply. 6A inductor current limit with
2.5A battery charge current limit. Instant-on functionality incorporated for battery voltages below 12.25V,
14.4V absorption voltage, 13.3V float voltage,and 15.6V maximum output voltage (Instant-On and NTC fault only).
Status pins light LEDs for visible charge-state monitoring.
R
SENSEA
0.008
Si7272DP
Si7272DP
Si7272DP
CMSH3-40MA
Si7272DP
R
SENSEB
0.008
56µF
×2
V
IN
5V TO 30V
LTC4020
SGND
BACK
PGND
4.7µF
SBR0560S1
R
T
, 130k
PV
IN
BG1
SW1
TG1
BST1
SGND
SENSGND
95.3k
2nF
2nF
SENSBOT
SENSTOP
SENSVIN
RT
SHDN
V
IN_REG
MODE
STAT1
STAT2
TIMER
RNG_SS
6-CELL LEAD-ACID (12V)
4020 TA02
INTVCC
BG2
SW2
TG2
BST2
SGND
VC
ITH
V
FBMAX
I
LIMIT
CSOUT
CSP
CSN
BGATE
BAT
V
FBMIN
FBG
VFB
NTC
1µF
284k
100k
1µF
0.033µF
33k
2.7k
15µH
XAL1010-153MEB
SBR0560S1
BZX84C6V2L
680pF
100Ω
Si7135DP
R
CS
0.02Ω
100Ω
1µF
20k
95.3k
R
NTC
10k
20k
0.33µF
4.7µF
0.1µF
56µF
×3
V
OUT
2.7k
+
+
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