Low-Cost Multichemistry Battery Chargers
Typical Application Circuits
RS1
0.01Ω
TO EXTERNAL
LOAD
AC ADAPTER INPUT
8.5V TO 28V
D1
C1
2 × 10µF
0.1µF
0.1µF
D2
CSSP
DCIN
CSSN
CELLS
R6
59kΩ
1%
(FLOAT-THREE CELLS SELECT)
R7
19.6kΩ
1%
C5
1µF
LDO
C13
R13
1µF
33Ω
LDO
VCTL
D3
BST
D/A OUTPUT
ICTL
DLOV
12.6V OUTPUT VOLTAGE
C15
0.1µF
C16
1µF
V
CC
REFIN
R8
1MΩ
ACIN
N1a
DHI
LX
ACOK
SHDN
ICHG
OUTPUT
N1b
DLO
A/D INPUT
MAX1908
MAX8724
L1
PGND
10µH
A/D INPUT
IINP
CCV
CSIP
C14
C20
R10
R9
R5
0.1µF
0.1µF
10kΩ
20kΩ
1kΩ
RS2
HOST
0.015Ω
C11
0.1µF
CSIN
BATT
GND
CCI
+
BATT
CCS
C9
0.01µF
C10
0.01µF
C4
22µF
REF
CLS
AVDD/REF
R19, R20, R21
10kΩ
7.5A INPUT
CURRENT LIMIT
C12
1µF
SMART
BATTERY
SCL
SDA
SCL
SDA
A/D INPUT
GND
TEMP
BATT-
PGND
GND
Figure 1. µC-Controlled Typical Application Circuit
______________________________________________________________________________________ 13
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
