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BQ2011KSN-N

更新时间： 2024-10-27 22:32:07

品牌	Logo	应用领域
德州仪器 - TI		仪表
页数	文件大小	规格书
20页	174K
描述
Gas Gauge IC for High Discharge Rates

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中文翻译

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BQ2011KSN-N 数据手册

bq2011K

Gas Gauge IC for

High Discharge Rates

Nominal available charge may be di-

Features

➤ Conservative and repeatable

measurement of available charge

in rechargeable batteries

General Description

rectly indicated using a five-seg-

ment LED display. These segments

are used to graphically indicate

nominal available charge.

The bq2011K Gas Gauge IC is in-

tended for battery-pack installation to

maintain an accurate record of a bat-

tery’s available charge. The IC moni-

tors a voltage drop across a sense re-

sistor connected in series between the

negative battery terminal and ground

to determine charge and discharge ac-

tivity of the battery. The bq2011K is

designed for systems such as power

tools with very high discharge rates.

➤ Designed for portable equipment

such as power tools with high dis-

charge rates

The bq2011K supports a simple

single-line bidirectional serial link to

an external processor (common

ground). The bq2011K outputs bat-

tery information in response to exter-

nal commands over the serial link. To

support subassembly testing, the

outputs may also be controlled by

command. The external processor

may also overwrite some of the

bq2011K gas gauge data registers.

➤ Designed for battery pack inte-

gration

- ¹²⁰µA typical standby current

(self-discharge estimation mode)

Battery self-discharge is estimated

based on an internal timer and tem-

perature sensor. Compensations for

battery temperature and rate of

charge or discharge are applied to

the charge, discharge, and

selfdischarge calculations to provide

available charge information across

a wide range of operating conditions.

Initial battery capacity is set using

the PROG_1-4and SPFC pins. Actual

battery capacity is automatically

“learned” in the course of a dis-

charge cycle from full to empty and

may be displayed depending on the

display mode.

- ^{Small size enables imple-}

mentations in as little as

square inch of PCB

The bq2011K may operate directly

from four cells. With the REF out-

put and an external transistor, a

simple, inexpensive regulator can be

built to provide V_CCfrom a greater

number of cells.

➤ Direct drive of LEDs for capacity

display

➤ Self-discharge compensation us-

ing internal temperature sensor

Internal registers include available

charge, temperature, capacity, battery

ID, and battery status.

➤ Simple single-wire serial commu-

nications port for subassembly

testing

➤ 16-pin narrow SOIC

Pin Connections

Pin Names

LCOM

LED common output

REF

Voltage reference output

No connect

SEG₁/PROG₁LED segment 1/ Program

1 input

LCOM

SEG /PROG

REF

RBI

Serial communications

input/output

SEG₂/PROG₂LED segment 2 / Program

2 input

SEG /PROG

RBI

Battery sense input

Display control input

Sense resistor input

3.0–6.5V

SEG₃/PROG₃LED segment 3/ Program

3 input

SEG /PROG

SEG

SEG₄/PROG₄LED segment 4/ Program

4 input

DISP

SPFC

DISP

SEG₅

SPFC

LED segment 5

V_CC

V_SS

16-Pin Narrow SOIC

Programmed full count

selection input

PN2011JK.eps

Negative battery terminal

10/97 B

12 3 4 5 6 7...20

中文翻译

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