MM3508B Series

MM3508B series is a double protection IC for 2 to 4 serial cells lithium-ion / lithium-polymer rechargable secondary battery.It detects battery voltage for each cell.Each of these IC composed of four voltage detectors, reference voltage sources, oscillator, counter circuit and logical circuits.

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)

Package

• SSON-6A
• SOT-26A