BQ2050HSN-A508TR Datasheet

IC型號：
BQ2050HSN-A508TR
PDF描述：
Low-Cost Lithium Ion Power Gauge IC
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232.51KB
PDF頁數(shù)：
25頁
芯片廠家：
TI

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bq2050H

Low-Cost Lithium Ion Power Gauge鈩?IC

Features

鉃?/div>

Accurate measurement of avail-

able capacity in Lithium Ion bat-

teries

鉃?/div>

Provides a low-cost battery man-

agement solution for pack

integration

General Description

The bq2050H Lithium Ion Power

Gauge鈩?IC is intended for battery-

pack or in-system installation to

maintain an accurate record of

available battery capacity. The IC

monitors a voltage drop across a

sense resistor connected in series

between the negative battery termi-

n a l a n d g r ou n d t o d e t e r m i n e

charge and discharge activity of

the battery. Compensations for bat-

tery temperature, self discharge,

and rate of discharge are applied to

the charge counter to provide avail-

able capacity information across a

wide range of operating conditions.

Battery capacity is automatically re-

calibrated, or 鈥渓earned,鈥?in the

course of a discharge cycle from full

to empty.

Nominal available capacity may be

directly indicated using a five-

segment LED display. These seg-

ments are used to graphically indi-

c a te av a ilab le c a p ac it y . T h e

bq2050H also supports a simple

single-line bidirectional serial link

to an external processor (common

ground). The 5kb HDQ bus interface

reduces communications overhead

in the external microcontroller.

Internal registers include available

capacity, temperature, scaled avail-

able energy, battery ID, battery

status, and Li-Ion charge FET

status. The external processor may

also overwrite some of the bq2050H

power gauge data registers.

The bq2050H can operate from the

batteries in the pack. The REF out-

put and an external transistor allow

a simple, inexpensive voltage regu-

lator to supply power to the circuit

from the cells.

Complete circuit can fit in as

little as

1 2

square inch of PCB

Low operating current (120碌A(chǔ)

typical)

Less than 100nA of data

retention current

鉃?/div>

High-speed (5kb) single-wire

communication interface (HDQ

bus) for critical battery

parameters

鉃?/div>

Monitors and controls charge FET

in Li-Ion pack protection circuit

鉃?/div>

Direct drive of remaining capacity

LEDs

鉃?/div>

Measurements automatically

compensated for rate and

temperature

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16-pin narrow SOIC

Pin Connections

Pin Names

LCOM

LED common output

DISP

RBI

HDQ

PSTAT

REF

System ground

Sense resistor input

Display control input

Battery sense input

Serial communications

input/output

Protector status input

Voltage reference output

Supply voltage

SEG

/PROG

LED segment 1/

program 1 input

SEG

/PROG

LED segment 2/

program 2 input

SEG

/PROG

LED segment 3/

program 3 input

SEG

/PROG

LED segment 4/

program 4 input

SEG

/PROG

LED segment 5/

program 5 input

CFC

Charge FET control

output

LCOM

SEG1/PROG1

SEG2/PROG2

SEG3/PROG3

SEG4/PROG4

SEG5/PROG5

CFC

VSS

VCC

REF

PSTAT

HDQ

RBI

DISP

16-Pin Narrow SOIC

PN2050H1.eps

SLUS150鈥揗AY 1999 D

標(biāo)準(zhǔn)包裝
2,500
類別
集成電路 (IC)
家庭
PMIC - 電池管理
系列
Power Gauge™
功能
燃料，電量檢測計/監(jiān)控器
電池化學(xué)
鋰離子（Li-Ion）
電源電壓
3 V ~ 6.5 V
工作溫度
0°C ~ 70°C
安裝類型
表面貼裝
封裝/外殼
16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝
16-SOIC N
包裝
帶卷 (TR)
配用
296-9352-ND - EVAL MOD FOR BQ2050H296-9509-ND - EVAL MOD BQ20XX GAS GAUGE IC'S

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BQ2050HSN-A508TR Datasheet

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