Cost-Saving Multichemistry
Battery-Charger System
MAX846A
20k
1.65V
2%
VSET
400k
1%
0 TO VL
DAC
n
WITH VOLTAGE OUTPUT DAC
Figure 4. VSET Adjustment Methods
MAX846A
20k
VSET
1.65V
2%
0
400k
1%
100%
µC
PWM
OUTPUT
WITH PWM FROM MICROCONTROLLER
MAX846A
ISET
20k
DAC
20k
n
WITH VOLTAGE OUTPUT DAC
Figure 5. ISET Adjustment Methods
MAX846A
ISET
10k
20k
0
10k
100%
µC
PWM
OUTPUT
WITH PWM FROM MICROCONTROLLER
OPTO-COUPLER
FEEDBACK
AC/DC
CONVERTER
MAX846
MICRO
CONTROLLER
Figure 6. Low-Cost Desktop Multichemistry Charger Concept
______________________________________________________________________________________ 11