LTC4020_15 Datasheet, PDF (37/42 Pages) Linear Technology – 55V Buck-Boost Multi-Chemistry Battery Charger

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.
V_IN
5V TO 30V
1µF
+ _56µF
×2
R_SENSEA
0.008
CMSH3-40MA
Si7272DP
15µH
XAL1010-153MEB
Si7272DP
R_SENSEB
0.008
Si7272DP
Si7272DP
0.1µF
V_OUT
4.7µF
56µF
×3
SBR0560S1
4.7µF
PGND
INTVCC
PV_IN
BG2
BG1
SW2
SW1
TG2
TG1
1µF
BST2
LTC4020
BST1
SGND
SGND
VC
SENSGND
0.033µF
SENSBOT
ITH
284k
R_T, 130k
SENSTOP
SENSVIN
RT
SHDN
V_FBMAX
I_LIMIT
CSOUT
CSP
100k
2.7k
2.7k
V_{IN_REG}
MODE
STAT1
STAT2
TIMER
CSN
BGATE
BAT
V_FBMIN
FBG
RNG_SS
VFB
SGND_BACK ^NTC
SBR0560S1
BZX84C6V2L
1µF
33k
680pF
95.3k
2nF
2nF
20k
100Ω
0.33µF _100Ω
R_SENSE
0.02Ω
Si7135DP
20k
95.3k
R_NTC
10k
6-CELL LEAD-ACID (12V)
4020 TA02
For more information www.linear.com/LTC4020
4020fb
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