Datasheet

MAX846A
Cost-Saving Multichemistry
Battery-Charger System
8 _______________________________________________________________________________________
MAX846A
VL
5nF
VL
VL
10k
5nF
4.7µF
R
DRV

660Ω
0.01µF
R
CS

165mΩ
I
BATT
TO µC
CA
VA
1.65V
CL
CSA
CS+
CS-
1k
BST
DCIN DRV
DC INPUT (OR P-CHANNEL)
3.5V TO 20V
3.3V, 1%
LDO
1.65V, 0.5%
REF
400k, 1%
(±5% ADJ)
Li
OR
Ni
N
N
N
BATT
REFOK
CS- > 2V
VL > 3V

ON
ON
OFF
VL
2V
20k, 2%
3.3V
TO
µC
GND
OR
DAC
TO
ADC
4.7µF
PWROK
DRV ENABLE
VL
2 Li
1 Li
OFF
OFFV
VSET
GND
CELL2
CCV
CCI
ISET
PGND
OPEN
OR
DAC
ON
BST
VA
R
VSET
Figure 1. Functional Diagram