Single-cell Li-ion / Li-polymer Battery Protection IC
Rev. E09-06
A7B Series
TYPICAL CONNECTION DIAGRAM
R1
VDD
C1
IC
Battery
VSS
DO
CO
VM
R2
EXTERNAL COMPONENTS
Min.
100ꢀ
0.01µF
500ꢀ
Items
Symbol
R1
Recommended value
Max.
1.0Kꢀ
1.0µF
6.0Kꢀ
Resistor 1
Capacitor 1
Resistor 2
330ꢀ
0.1µF
3.9Kꢀ
C1
R2
z
The supply voltage (VDD) to this IC is stabilized by R1 and C1. Moreover, R1 and R2 act as the current
restriction resistances at the time of reverse-connecting a charger, or at the time of connecting a charger which
outputs the voltage exceeding the absolute maximum rating of this IC. Please be sure to connect these
components.
z
z
z
If the value of R1 is too large, the over-charge detection voltage and the over-discharge detection voltage will
become high due to the current consumption of this IC. Please use the value within the limits shown in the table.
330ꢀ is recommended.
If the value of C1 is too small, this IC may be in a shutdown state at the time of the discharge over-current or the
load short-circuiting. Please use the value within the limits shown in the table for stable operation. 0.1μF is
recommended.
Please use the value within the limits shown in the table about the value of R2. In order to reduce the current at
the time of reverse-connecting a charger, we recommend you to choose R1 and R2 so that the sum total become
more than 4Kꢀ. The recommended value of R2 is 3.9Kꢀ.
Note)
The connection diagram and each value of external components shown above are just recommendation.
Including a battery and FETs, please determine the circuit after sufficient evaluation about your actual
application.
AnaSem Inc.
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ANASEM [ AnaSem Hong Kong Limited ]
