Datasheet

MAX712/MAX713
NiCd/NiMH Battery
Fast-Charge Controllers
15
Maxim Integrated
Q1 D1
R2
150Ω
DC IN
33kΩ
Q2
500Ω
DRV
BATT+
TO
BATTERY
POSITIVE
TERMINAL
MAX712
MAX713
Figure 15. Cascoding to Accommodate High Cell Counts for
Linear-Mode Circuits
100kΩ
D1
V+
GND
R
SENSE
>4 CELLS
LOW R
ON
LOGIC LEVEL
N-CHANNEL
POWER
MOSFET
*
*
MAX712
MAX713
100kΩ
Figure 16. Shunting R
SENSE
for Efficiency Improvement
V
CC
OV = NO POWER
5V = POWER
OV = FAST
V
CC
= TRICKLE OR
NO POWER
MAX712
MAX713
V+
FASTCHG
10kΩ
Figure 17. Logic-Level Status Outputs
V+
R1
470ΩMIN
FASTCHG
DC IN
CHARGE POWER
FAST CHARGE
MAX712
MAX713
Figure 18. LED Connection for Status Outputs