Low-Cost Multichemistry Battery Chargers
Functional Diagram
MAX1908
MAX8724
DCIN
SHDN
GND
23.5%
REFIN
LDO
RDY
5.4V
LINEAR
REGULATOR
4.096V
REFERENCE
REF
LOGIC
BLOCK
GND
1/55
ICTL
REFIN
SRDY
ACIN
ACOK
DCIN
X
N
REF/2
CCS
CLS
75mV
REF
IINP
GM
GM
GMS
CSSP
CSSN
LEVEL
SHIFTER
ICHG
CSI
CSIP
CSIN
LEVEL
SHIFTER
BST
DHI
LX
GMI
75mV
REFIN
LEVEL
SHIFTER
ICTL
CCI
X
DRIVER
MAX1908 ONLY
3.1V/CELL
BATT
BAT_UV
LVC
DC-DC
LVC
CONVERTER
R1
REFIN
GMV
CELL
SELECT
LOGIC
CELLS
DLOV
DLO
DRIVER
CCV
PGND
400mV
REFIN
VCTL
4V
X
Figure 3. Functional Diagram
______________________________________________________________________________________ 15
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
