Datasheet

LTC4020
39
4020fd
For more information www.linear.com/LTC4020
Typical applicaTions
9V to 55V to 9-cell lead-acid (18V) charger/system supply with no PowerPath.
External 5V regulator for boosted supplies. 5A inductor current limit with 1.67A battery charge current limit.
21.5V absorption voltage output, 19.9V float voltage output.
R
SENSEA
0.01
R
SENSEB
0.01
Si7960DP
Si7272DP
CMSH3-40MA
Si7272DP
Si7850DP
56µF
×2
V
IN
9V TO 55V
LTC4020
SGND
BACK
PGND
4.7µF
SBR0560S1
R
T
, 100k
0.033µF
PV
IN
BG1
SW1
TG1
BST1
SGND
SENSGND
SENSBOT
SENSTOP
SENSVIN
RT
SHDN
V
IN_REG
MODE
STAT1
STAT2
TIMER
RNG_SS
9-CELL LEAD-ACID (18V)
4020 TA04
INTV
CC
BG2
SW2
TG2
BST2
SGND
VC
ITH
V
FBMAX
I
LIMIT
CSOUT
CSP
CSN
BGATE
BAT
V
FBMIN
FBG
VFB
10k
NTC
1µF
1.5nF
1µF
249k
100k
43k
43k
15µH
SBR0560S1
BZX84C6V2L
680pF
100Ω
1µF
0.1µF
4.7µF
V
OUT
56µF
×3
LT3010-5
V
IN
OUT
SHDN SENSE
GND
+
XAL1010-153MEB
100Ω
R
CS
0.03Ω
100pF
0.33µF
75.9k
+
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