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BQ2056WTS

更新时间： 2024-10-27 22:48:27

品牌	Logo	应用领域
德州仪器 - TI		电池
页数	文件大小	规格书
12页	191K
描述
Advanced Li-Ion Linear Charge Management IC

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中文翻译

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BQ2056WTS 数据手册

bq2057

Advanced Li-Ion Linear Charge

Management IC

the magnitude of the current. The

Features

General Description

sense-resistor can be on either the

low or the high side of the battery

without additional components. The

constant-current phase continues

until the battery reaches the

charge-regulation voltage.

➤ Ideal for single- and dual-cell Li-Ion

The BENCHMARQ bq2057 series

advanced Li-Ion linear charge-man-

agement ICs are designed for

cost-sensitive and compact portable

electronics. They combine high-accu-

racy current and voltage regulation,

battery conditioning, temperature

monitoring, charge termination,

charge-status indication, and

AutoComp charge-rate compen-

sation in a single 8-pin IC.

packs with coke or graphite anodes

➤ Dropout voltage as low as 0.3V

➤ AutoComp™ dynamic compensa-

tion of battery pack’s internal im-

pedance

The bq2057 then begins the con-

stant-voltage phase. The accuracy of

the voltage regulation is better than

1% over the operating-temperature

and supply-voltage ranges. For sin-

gle and dual cells with either coke

or graphite anodes, the bq2057 is of-

fered in four fixed-voltage versions:

4.1V, 4.2V, 8.2V, and 8.4V. Charge

stops when the current tapers to the

charge termination threshold,

➤ Optional temperature-monitoring

before and during charge

➤ Integrated voltage and current

regulation with programmable

charge-current and high- or

low-side current sensing

The bq2057 continuously measures

battery temperature using an exter-

nal thermistor. For safety reasons,

the bq2057 inhibits charge until the

battery temperature is within

user-defined thresholds. The bq2057

then charges the battery in three

phases: conditioning, constant cur-

rent, and constant voltage. If the

battery voltage is below the

low-voltage threshold V_MIN, the

bq2057 trickle-charges to condition

the battery. The conditioning charge

rate is set at 10% of the regulation

current. The conditioning current

also minimizes heat dissipation in

the external pass-element during

the initial stage of charge.

➤ Integrated cell conditioning for

reviving deeply discharged cells

and minimizing heat dissipation

during initial stage of charge

_TERM. The bq2057 automatically

restarts the charge if the battery

voltage falls below the V_RCHthresh-

old.

➤ Better than 1% voltage regula-

tion accuracy

The designer also may use the

AutoComp feature to reduce charg-

ing time. This proprietary technique

allows safe and dynamic compensa-

tion for the internal impedance of

the battery pack during charge.

➤ Charge status output for LED or

host processor interface

➤ Automatic battery-recharge feature

➤ Charge termination by minimum

current

➤ Low-power sleep mode

After conditioning, the bq2057 ap-

plies a constant current to the bat-

tery. An external sense-resistor sets

➤ Packaging: 8-pin SOIC, 8-pin

TSSOP

Pin Names

Pin Connections

STAT

V_SS

Charge status output

Ground input

SNS

BAT

V_CC

Current-sense input

Battery-voltage input

Supply voltage

SNS

BAT

V_CC

COMP

Charge control output

COMP Charge-rate

compensation input

Temperature sense

input

V_SS

STAT

8-Pin PDIP, Narrow SOIC, or TSSOP

PN-205701.eps

SLUS025A – JANUARY 2000 - REVISED MAY 2000

12 3 4 5 6 7...12

中文翻译

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与BQ2056WTS相关器件

型号	品牌	获取价格	描述	数据表
BQ2057	TI	获取价格	Advanced Li-Ion Linear Charge Management IC
BQ2057C	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER
BQ2057CDGK	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER
BQ2057CDGKG4	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE-AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYM
BQ2057CDGKR	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER
BQ2057CDGKRG4	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE-AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYM
BQ2057CPN	ETC	获取价格	Industrial Control IC
BQ2057CSN	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER
BQ2057CSNG4	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE-AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYM
BQ2057CSNTR	TI	获取价格	ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER

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