Datasheet > 暂无类别数据> BQ2031SN

BQ2031SN

更新时间： 2024-10-27 22:48:27

品牌	Logo	应用领域
德州仪器 - TI		光电二极管
页数	文件大小	规格书
16页	169K
描述
Lead-Acid Fast-Charge IC

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中文翻译

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BQ2031SN 数据手册

bq2031

Lead-Acid Fast-Charge IC

charging until the voltage rises into

- ^{Ideal for high-efficiency}

Features

➤ Conforms to battery manufactur-

ers' charge recommendations for

cyclic and float charge

the allowed range or an internal

timer runs out and places the

bq2031 in a Fault condition. This

procedure prevents high-current

charging of cells that are possibly

damaged or reversed. Charging is

inhibited anytime the temperature

of the battery is outside the config-

urable, allowed range. All voltage

thresholds are temperature-

compensated.

switch-mode power conversion

- ^{Configurable for linear or}

gated current use

➤ Direct LED control outputs dis-

play charge status and fault con-

ditions

➤ Pin-selectable charge algorithms

- ^{Two-Step Voltage with}

temperature-compensated

constant-voltage maintenance

General Description

- ^{Two-Step Current with}

constant-rate pulsed current

maintenance

The bq2031 Lead-Acid Fast Charge

IC is designed to optimize charging

of lead-acid chemistry batteries. A

flexible pulse-width modulation

regulator allows the bq2031 to con-

trol constant-voltage, constant-

current, or pulsed-current charging.

The regulator frequency is set by an

external capacitor for design flexi-

bility. The switch-mode design keeps

power dissipation to a minimum for

high charge current applications.

The bq2031 terminates fast (bulk)

charging based on the following:

- ^{Pulsed Current: hysteretic,}

on-demand pulsed current

ꢀ

Maximum voltage

➤ Pin-selectable charge termination

by maximum voltage,∆²V, mini-

mum current, and maximum

time

ꢀ

Second difference of cell voltage

(∆²V)

ꢀ

Minimum current (in constant-

voltage charging)

➤ Pre-charge qualification detects

shorted, opened, or damaged cells

and conditions battery

Maximum time-out (MTO)

After bulk charging, the bq2031 pro-

vides temperature-compensated

maintenance (float) charging to

maintain battery capacity.

A charge cycle begins when power is

applied or the battery is replaced.

For safety, charging is inhibited un-

til the battery voltage is within con-

figured limits. If the battery voltage is

less than the low-voltage threshold,

the bq2031 provides trickle-current

➤ Charging continuously qualified by

temperature and voltage limits

➤ Internal temperature-compen-

sated voltage reference

➤ Pulse-width modulation control

Pin Connections

Pin Names

LED₃/

QSEL

Charge status output 3/

Charge algorithm select

input 1

TMTO

FLOAT

BAT

Time-out timebase input

State control output

TMTO

FLOAT

BAT

LED /DSEL

LED /TSEL

COM

V_SS

Common LED output

System ground

Battery voltage input

Voltage loop comp input

Current loop comp input

Current gain select input

Sense resistor input

MOD

VCOMP

ICOMP

IGSEL

SNS

VCOMP

ICOMP

IGSEL

V_CC

5.0V 10% power

MOD

Modulation control

output

COM

SNS

LED /QSEL

LED₁/

TSEL

Charge status output 1/

Charge algorithm select

input 2

TPWM

Temperature sense input

Regulator timebase input

TPWM

16-Pin Narrow

DIP or SOIC

LED₂/

DSEL

Charge status output 2/

Display select input

PN203101.eps

SLUS156–JUNE 1999 E

12 3 4 5 6 7...16

中文翻译

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