BQ294708集成电路（IC）的电池管理规格书PDF中文资料

BQ294708属于集成电路（IC）的电池管理。由德州仪器制造生产的BQ294708电池管理电池管理 PMIC（电源管理集成电路）系列产品可用于电池相关的监测和控制功能，包括身份验证、电池平衡、状态监测、电量计量、电源选择、短路保护、过压和欠压保护等等。请注意，虽然该系列中的某些产品可能包括电池充电功能，但将充电功能作为主要功能的产品是单独分类的。

1 Features

• 2-, 3-, and 4-series cell overvoltage protection

• External capacitor-programmed delay timer

• Factory programmed OVP threshold (threshold

range 3.85 V to 4.6 V)

• Output options: active high or open drain active

low

• High-accuracy overvoltage protection: ±10 mV

• Low power consumption ICC ≈ 1 μA

(VCELL(ALL) < VPROTECT)

• Low leakage current per cell input < 100 nA

• Small package footprint

– 8-pin WSON (2.00 mm x 2.00 mm)

2 Applications

• Notebooks

• UPS battery backup

3 Description

The BQ2947 family is an overvoltage monitor and

protector for Li-Ion battery pack systems. Each cell is

monitored independently for an overvoltage condition.

In the BQ2947 device, an external delay timer is

initiated upon detection of an overvoltage condition on

any cell. Upon expiration of the delay timer, the output

is triggered into its active state (either high or low,

depending on the configuration). The external delay

timer feature also includes the ability to detect an

open or shorted delay capacitor on the CD pin, which

will similarly trigger the output driver in an overvoltage

condition.

For quicker production-line testing, the BQ2947

device provides a Customer Test Mode with 67

reduced delay time.