MM3508A Series

MM3508A series is a double protection IC for 2 to 4 serial cells lithium-ion / lithium-polymer rechargable battery for secondary protection IC. It detects battery voltage for each cell.The FUSE cutting signal is the output between period of time. And the CELL voltage is released by electric discharge after FUSE was cut.

For 2 to 4 cells secondary protection

1. Range and accuracy of overcharge detection/hysteresis voltage
　●Overcharge detection voltage 4.0V to 4.5V, 5mV step Accuracy±20mV
　●Overcharge hysteresis voltage -500mV to -50mV, 50mV step Accuracy±20%

2. Range of detection delay time
　●Overcharge detection delay time 1ms to (1ms×2n1)+(1ms×2n2)
　*n1 and n2 can select two arbitrary integers between 0 to 13. (However n1≠n2)

3. Low current consumption
　●Typ. 3.5µA, Max. 5.0µA (Vcell=4.0V)
　●Typ. 0.15µA, Max. 0.30µA (Vcell=2.3V)

4. The FUSE cutting signal is the output between period of time.
And the CELL voltage is released by electric discharge resistance of "60KΩ" after FUSE was cut.
And CELL stops an electric discharge if the CELL voltage becomes less than the electric discharge release voltage.

Package

• SSON-6A
• SOT-26A