English 
The MM3877 series is a high-voltage CMOS-based IC for over-charge, over-discharge, over-current and short-circuit temperature protection and cell balance control of 4 to 7 cells Li-ion/Li-polymer rechargeable batteries.
It also has a temperature detection and cell balance control function using an external NTC thermistor.
The internal structure consists of voltage detectors, reference voltage sources, oscillator circuits, counter circuits and logical circuits.
Multiple MM3877s can be stacked in order to provide low-cost, space-saving protection circuits for applications with 7 or more cells.
| Part No. | Number of Cells | Overcharge Detection Voltage | Overdischarge Detection Voltage | Discharge Overcurrent Detection Voltage |
| MM3877C05WBE | 4 to 7 | 4,25 | 2,75 | 0,1 |
MinbeaMitsumi lithium battery management circuits are made in Japan and are of the highest quality. They will be perfectly suited for your applications.