BM3451

BYD Microelectronics Co., Ltd. BM3451 Series 3/4/5 Cell Battery Protectors General Description The BM3451 is a professional protection IC for 3/4/5 cells rechargeable battery pack; it is highly integrated, and generally used in power tools, electric bicycles and UPS applications. The BM3451 works constantly to monitor each cell’s voltage, the current of charge or discharge, and the temperature of the environment to provide overcharge, over-discharge, discharge overcurrent, short circuit, charge overcurrent and over-temperature protections, etc. Besides, it also can change the protection delay time of overcharge, over-discharge and discharge overcurrent by setting the external capacitors. The BM3451 provides external bleeding for cell-capacity balance function to avoid unbalanced capacity between each cell. Thus, the batteries can work for longer. Extended function module embedded in the BM3451 ICs can make them work for more battery packs with multiple chips, and they can protect 6...