LTC4007-1_15 Datasheet, PDF (24/24 Pages) Linear Technology – 4A, High Efficiency, Li-Ion Battery Charger

LTC4007-1
TYPICAL APPLICATIO
12.6V, 4A Li-Ion Battery Charger
DCIN
0V TO 20V
3A
V_LOGIC
LOBAT
R10 R11 R12
100k 100k 100k ^*
3C4C
CHEM
LOBAT
DCIN
INFET
CLP
I_CL
I_CL LTC4007-1 CLN
ACP
ACP
TGATE
SHDN
SHDN
BGATE
FAULT
FAULT
PGND
CHG
CHG
CSP
FLAG
FLAG
R9 32.4k 1%
NTC
BAT
PROG
THERMISTOR
10k
NTC
C7
0.47µF
R_RT
309k
1%
R_T
ITH
GND
TIMING RESISTOR
(~2 HOURS)
Q3
INPUT SWITCH
C1
0.1µF
R1
4.99k
1%
C4
15nF
R_CL
0.033Ω
1%
C2
20µF
Q1
L1
R_SENSE
0.025Ω
10µH 4A _1%
Q2
D1
R4
3.01k 1%
R5 3.01k 1%
R7
6.04k
1%
C6
0.12µF
C5
0.0047µF
R_PROG
26.7k
1%
*PIN OPEN
D1: MBRS130T3
Q1: Si4431BDY
Q2: FDC645N
40071 TA02
SYSTEM
LOAD
BAT
C3
20µF
CHARGING
CURRENT
MONITOR
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No R_SENSE is a trademark of Linear Technology Corporation.
40071f
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT/TP 1005 500 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005