Nisshinbo Micro Devices R5478N218CD-TR-FF, 1 Linear Voltage, Voltage Regulator, -0.3 → 0.3 V 6-Pin, SOT-23-6

The Nisshinbo Micro Devices Battery Protection IC is composed of three voltage detectors, a reference unit, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. When the over charge voltage crosses the detector threshold from a low value to a high value, the output of COUT pin switches to low level after internal fixed delay time. The conditions to release over charge detector are different by mask options. In terms of so called “Latch function” version, after detecting over charge, the detector can be reset and the output of COUT becomes "H" when a kind of load is connected to VDD after a charger is disconnected from the battery pack, and the cell voltage becomes lower than over charge detector threshold.

Short circuit protection circuit
Manufactured with high voltage tolerant process
High accuracy detector threshold
Variety of detector threshold