Datasheet > BM3451HEDC-T28A

BM3451HEDC-T28A

更新时间： 2024-10-02 02:50:51

品牌	Logo	应用领域
其他 - ETC		电池
页数	文件大小	规格书
28页	782K
描述
3/4/5 Cell Battery Protectors

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BM3451HEDC-T28A 数据手册

BM3451 Series

3/4/5 Cell Battery Protectors

BYD Microelectronics Co., Ltd.

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-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℃)

accuracy: ±50 mV

·overcharge hysteresis

·over-discharge threshold

·over-discharge hysteresis

0.1V

1.6V~3.0V

accuracy: ±80 mV

0V / 0.2V / 0.4V accuracy: ±100 mV

(2) Three grades voltage detection of discharge overcurrent

·discharge overcurrent 1

·discharge overcurrent 2

·short circuit

0.025 V ~ 0.30 V

(50 mV step)

0.2 V / 0.3V / 0.4V / 0.6 V

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 cell protection enable

(5) Setting of output delay time

·overcharge, over-discharge, discharge overcurrent 1 and discharge overcurrent 2 protection delay

time can be set by external capacitors

(6) Supports external bleeding for balance

(7) Controlling the state of charge or discharge by external signals

(8) The maximum output voltage of CO / DO: 12V

(9) Over-temperature protection

(10) Breaking wire protection

(11) Low power consumption

·operation mode（with Temp protection）

·operation mode（without Temp protection）

·sleeping mode

25 μA typical

15 μA typical

6 μA typical

Datasheet

WI-D06-J-0036 Rev.A/1

1 / 28

12 3 4 5 6 7...28

中文翻译

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与BM3451HEDC-T28A相关器件

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BM34B-PUDSS-TFC	JST	获取价格	该产品是间距为 2.0mm、压著型、采用了双排构造的带强力锁定电路板对电线连接用连接器。尽
BM34B-ZPDZS-TF	JST	获取价格	为了与高密度印刷电路板设计相适应，该ZPD连接器设计为1.5mm间距双列式连接器，并带有安
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