BQ2902

更新时间： 2024-09-13 21:53:47

品牌	Logo	应用领域
德州仪器 - TI		电池控制器
页数	文件大小	规格书
12页	125K
描述
Rechargeable Alkaline Charge/Discharge Controller IC

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中文翻译

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BQ2902 数据手册

bq2902

Rechargeable Alkaline Charge/Discharge

Controller IC

Charge completion is indicated

General Description

Features

when the average charge rate falls

below approximately 3% of the fast

➤ Safely charges two rechargeable

The bq2902 is a low-cost charger for

rechargeable alkaline batteries such

as Renewal batteries from Rayovac .

The bq2902 combines sensitive, full-

charge detection for two recharge-

able alkaline cells, with a low-battery

cut-off for overdischarge protection.

charge rate. A status output is pro-

vided to indicate charge in progress,

charge complete, or fault indication.

alkaline batteries such as Re-

newal from Rayovac

➤ Terminates pulsed charge with

The bq2902 avoids over-depleting

the battery by using the internal

end-of-discharge control circuit.

The bq2902 also eliminates the

external power switching transis-

tors needed to separately charge

individual Renewal cells.

maximum voltage limit

➤ Contains LED charge status out-

put

Designed for system integration

into a two-cell system, the bq2902

can improve the service life of the

rechargeable alkaline cells by prop-

erly managing the charge and dis-

charge. The bq2902 requires a

voltage limited current source to

generate the proper charge pulses

➤ Features a pin-selectable

low-battery cut-off

➤ Pre-charge qualification indicates

For safety, charging is inhibited if

the per-cell voltage is greater than

3.0V during charge (closed-circuit

voltage), or if the cell voltage is less

than 0.4V (open-circuit voltage).

fault condition

➤ Available in 8-pin 300-mil DIP or

150-mil SOIC

for the Renewal cell. Each cell is

individually monitored to ensure

full charge without a damaging

overcharge.

Pin Connections

Pin Names

Charging supply input

Battery status output

Battery 1 positive input

Battery 1 negative input

V_SS

Battery 2 negative input

IC ground

CHG

BAT_1P

BAT_1N

LRTN

V_SEL

System load return

End-of-discharge voltage

select input

CHG

SEL

BAT

LRTN

8-Pin Narrow DIP

or SOIC

PN290201.eps

5/99 C

12 3 4 5 6 7...12

中文翻译

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