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BQ2011KSNN

更新时间： 2024-10-28 13:05:59

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德州仪器 - TI		仪表
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20页	180K
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BQ2011KSNN 数据手册

bq2011

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 indicate graphically the

nominal available charge.

The bq2011 Gas Gauge IC is intended

for battery-pack installation to main-

tain an accurate record of available

battery charge. The IC monitors a

voltage drop across a sense resistor

connected in series between the nega-

tive battery terminal and ground to

determine charge and discharge ac-

tivity of the battery. The bq2011 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 bq2011 supports a simple single-

line bidirectional serial link to an exter-

nal processor (common ground). The

bq2011 outputs battery information in

response to external commands over the

serial link. To support subassembly

testing, the outputs may also be con-

trolled by command. The external proc-

essor may also overwrite some of the

bq2011 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 PFC and MODE 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-}

The bq2011 may operate directly

from four cells. With the REF output

and an external transistor, a simple,

inexpensive regulator can be built to

provide V_CCfrom a greater number

of cells.

mentations in as little as

square inch of PCB

➤ 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

MODE

SEG₁

SEG₂

SEG₃

SEG₄

SEG₅

PFC

Display mode output

LED segment 1

LED segment 2

LED segment 3

LED segment 4

LED segment 5

No connect

MODE

Serial communications

input/output

SEG

REF

RBI

Battery sense input

Display control input

Sense resistor input

3.0–6.5V

DISP

Programmed full count

selection input

PFC

DISP

V_CC

V_SS

REF

Voltage reference output

Negative battery terminal

16-Pin Narrow SOIC

PN201101.eps

2/96 E

12 3 4 5 6 7...20

中文翻译

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