BYD Microelectronics BM3451
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. The BM3451 provides external bleeding for cell-capacity balance function to avoid unbalanced capacity between each cell.| Part No. | BM3451 |
|---|---|
| Datasheet | BM3451 Download |
| Manufacturer |  BYD Microelectronics |
| Description | 3/4/5 Cell Battery Protectors |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Besides, it also can change the protection delay time of overcharge, over-discharge and discharge overcurrent by setting the external capacitors. 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-cell batteries or more than 6-cell batteries.FEATURES
(1) High-accuracy voltage detection for each cell●overcharge threshold 3.6V~4.6V accuracy: ±25 mV (+25℃) accuracy: ±40 mV (-40℃ to +85℃)
●overcharge hysteresis 0.1V accuracy: ±50 mV
●over-discharge threshold 1.6V~3.0V accuracy: ±80 mV
●over-discharge hysteresis 0V / 0.2V / 0.4V accuracy: ±100 mV (2) Three grades voltage detection of discharge overcurrent
●discharge overcurrent 1 0.025 V ~ 0.30 V (50 mV step)
●discharge overcurrent 2 0.2 V / 0.3V / 0.4V / 0.6 V
●short circuit 0.8V / 1.2 V (3) Charge overcurrent detection
●detection voltage -0.03V / -0.05V / -0.1V / -0.15V / -0.2 V (4) 3/4/5 ce...
