BQ294708集成電路（IC）的電池管理規(guī)格書(shū)PDF中文資料

BQ294708屬于集成電路（IC）的電池管理。由德州儀器制造生產(chǎn)的BQ294708電池管理電池管理 PMIC（電源管理集成電路）系列產(chǎn)品可用于電池相關(guān)的監(jiān)測(cè)和控制功能，包括身份驗(yàn)證、電池平衡、狀態(tài)監(jiān)測(cè)、電量計(jì)量、電源選擇、短路保護(hù)、過(guò)壓和欠壓保護(hù)等等。請(qǐng)注意，雖然該系列中的某些產(chǎn)品可能包括電池充電功能，但將充電功能作為主要功能的產(chǎn)品是單獨(dú)分類(lèi)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.