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BQ2014

更新时间： 2024-10-27 22:48:27

品牌	Logo	应用领域
德州仪器 - TI		仪表
页数	文件大小	规格书
22页	233K
描述
Gas Gauge IC with External Charge Control

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中文翻译

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BQ2014 数据手册

bq2014

Gas Gauge IC with External Charge Control

Nominal Available Charge (NAC)

Features

➤ Conservative and repeatable

measurement of available charge

in rechargeable batteries

General Description

may be directly indicated using a

The bq2014 Gas Gauge IC is in-

tended for battery-pack or in-system

installation to maintain an accurate

record of available battery charge.

The IC monitors the voltage drop

across a sense resistor connected in

series between the negative battery

terminal and ground to determine

charge and discharge activity of the

battery.

five-segment LED display.

The bq2014 supports a simple single-

line bidirectional serial link to an ex-

ternal processor (with a common

ground). The bq2014 outputs battery

information in response to external

commands over the serial link.

➤ Charge control output operates an

external charge controller such as

the bq2004 Fast Charge IC

➤ Designed for battery pack inte-

gration

Internal registers include available

charge, temperature, capacity, bat-

tery voltage, battery ID, battery

status, and programming pin set-

tings. To support subassembly test-

ing, the outputs may also be con-

trolled. The external processor may

also overwrite some of the bq2014

gas gauge data registers.

- ¹²⁰µA typical standby current

➤ Display capacity via single-wire

serial communication port or di-

rect drive of LEDs

Self-discharge of NiMH and NiCd

batteries is estimated based on an

internal timer and temperature sen-

sor. Compensations for battery tem-

perature and rate of charge or dis-

charge are applied to the charge, dis-

charge, and self-discharge calcula-

tions to provide available charge in-

formation across a wide range of op-

erating conditions. Battery capacity

is automatically recalibrated, or

“learned,” in the course of a dis-

charge cycle from full to empty.

➤ Measurements compensated for

current and temperature

The bq2014 may operate directly

from three or four cells. With the

REF output and an external transis-

tor, a simple, inexpensive regulator

can be built to provide V_CCacross a

greater number of cells.

➤ Self-discharge compensation using

internal temperature sensor

➤ User-selectable end-of-discharge

threshold

➤ Battery voltage, nominal avail-

able charge, temperature, etc.

available over serial port

The bq2014 includes a charge con-

trol output that controls an external

Fast Charge IC such as the bq2004.

➤ 16-pin narrow SOIC

Pin Connections

Pin Names

LCOM

LED common output

REF

CHG

Voltage reference output

Charge control output

SEG₁/PROG₁LED segment 1/

program 1 input

LCOM

SEG /PROG

Serial communications

input/output

REF

CHG

SEG₂/PROG₂LED segment 2/

program 2 input

SEG /PROG

EMPTY

Empty battery indicator

output

SEG /PROG

SEG₃/PROG₃LED segment 3/

program 3 input

SEG /PROG

EMPTY

Battery sense input

Display control input

Sense resistor input

3.0–6.5V

SEG /PROG

SEG₄/PROG₄LED segment 4/

program 4 input

DONE

DISP

SEG₅/PROG₅LED segment 5/

program 5 input

16-Pin Narrow SOIC

V_CC

V_SS

PN201401.eps

DONE

Fast charge complete

System ground

12/95 C

12 3 4 5 6 7...22

中文翻译

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与BQ2014相关器件

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BQ2014SN	TI	获取价格	Gas Gauge IC with External Charge Control
BQ2014SN-D120	TI	获取价格	Gas Gauge IC with External Charge Control
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