Texas Instruments bq27500 - Manual

Texas Instruments bq27500

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Table of Contents:

  • Page 3 – DEVICE INFORMATION; AVAILABLE OPTIONS; TERMINAL FUNCTIONS; System-Side Impedance TrackTM Fuel Gauge
  • Page 4 – ABSOLUTE MAXIMUM RATINGS; C, Typical Values at T
  • Page 5 – C and V
  • Page 7 – C-Compatible Interface Timing Diagrams
  • Page 8 – Manufacturer Information Blocks.; NOTE
  • Page 9 – STANDARD DATA COMMANDS; C transmissions must
  • Page 10 – Table 4-3. CONTROL STATUS Bit Definitions
  • Page 14 – EXTENDED DATA COMMANDS; . For details on the SEALED and UNSEALED states, see
  • Page 15 – SEALED Access: This command is not available in SEALED mode.
  • Page 16 – DATA FLASH INTERFACE; ACCESSING THE DATA FLASH; for specific bit definitions.
  • Page 17 – MANUFACTURER INFORMATION BLOCKS; x5f for editing or reading by the system.; Security Mode
  • Page 18 – DATA FLASH SUMMARY
  • Page 21 – IMPEDANCE TRACKTM VARIABLES; Current Model Used; If ILoad Mode = 1 (Constant Power) then the following options shown in; Power Model Used
  • Page 23 – DETAILED DESCRIPTION OF DEDICATED PINS; The Operation Configuration Register; . This register is programmed/read via the methods desribed in; Table 5-3. Operation Configuration Bit Definition; Operation; Charge Inhibit for additional details.
  • Page 24 – Battery Detection Using the BI/TOUT Pin; The flowchart of
  • Page 26 – Overtemperature: Charge; CHARGING AND CHARGE-TERMINATION INDICATION; Detecting Charge Termination; Standard Data Commands for
  • Page 27 – The relationship between these modes is shown in; through R
  • Page 28 – HIBERNATE MODE; C command to the gauge. I
  • Page 29 – RESET FUNCTIONS; As shown in
  • Page 30 – FLASH UPDATES; Threshold Settings; IWAKE; Flash Update OK Voltage. Flash programming current can
  • Page 31 – APPLICATION-SPECIFIC INFORMATION; BATTERY PROFILE STORAGE AND SELECTION; General Profile Description; APPLICATION-SPECIFIC FLOW AND CONTROL; Reading Application Status; Application
  • Page 33 – COMMUNICATIONS; C INTERFACE; C Formats
  • Page 35 – PACKAGING INFORMATION; PACKAGE OPTION ADDENDUM
  • Page 39 – IMPORTANT NOTICE; Products
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1

INTRODUCTION

1.1 FEATURES

1.2

APPLICATIONS

1.3

DESCRIPTION

Host System

Single Cell Li-Ion

Battery Pack

PACK-

PROTECTION

IC

CHG
DSG

Temp

Sense

Battery
Good

Current

Sense

I2C

T

LDO

PACK+

Voltage

Sense

Battery
Low
Warning

FETs

bq 27500 /1

RID

RID

Sense*

* bq27501 Only

Power

Management

Controller

bq27500
bq27501

System-Side Impedance Track™ Fuel Gauge

SLUS785 – SEPTEMBER 2007

•

Battery Fuel Gauge for 1-Series Li-Ion

•

Smartphones

Applications

•

PDAs

•

Resides on System Main Board

•

Digital Still and Video Cameras

–

Works with Embedded or Removable

•

Handheld Terminals

Battery Packs

•

MP3 or Multimedia Players

•

Two Varieties
–

bq27500: Uses PACK+, PACK-, and T
Battery Terminals

–

bq27501: Includes Battery Pack ID Resistor
(RID) Terminal

The Texas Instruments bq27500/01 System-Side
Li-Ion Battery Fuel Gauge is a micro-controller

•

Micro-Controller Peripheral Provides:

peripheral that provides fuel gauging for single cell

–

Accurate Battery Fuel Gauging

Li-Ion battery packs. The device requires little system

–

Internal Temperature Sensor for System

micro-controller

firmware

development.

The

Temperature Reporting

bq27500/01 resides on the system’s main board, and

–

Battery Low Interrupt Warning

manages an embedded battery (non-removable) or a

–

Battery Insertion Indicator

removable battery pack.

–

Battery ID Detection

–

96 bytes of Non-Volatile Scratch Pad

The

bq27500/01

uses

the

patented

Impedance

FLASH

Track™ algorithm for fuel gauging, and provides
information

such

as

remaining

battery

capacity

•

Battery Fuel Gauge Based on Patented

(mAh), state-of-charge (%), run-time to empty (min.),

Impedance Track™ Technology

battery voltage (mV), and temperature (

°

C).

–

Models the Battery Discharge Curve for
Accurate Time-to-Empty Predictions

Battery fuel gauging with the bq27500 requires only

–

Automatically Adjusts for Battery Aging,

PACK+

(P+),

PACK-

(P-),

and

Thermistor

(T)

Battery Self Discharge, and

connections

to

a

removable

battery

pack

or

Temperature/Rate Inefficiencies

embedded battery circuit. The bq27501 works with

–

Low Value Sense Resistor (10m

Ω

or Less)

identification resistors in battery packs, to gauge

•

I

2

C™ Interface for Connection to System

batteries of different fundamental chemistries and/or

Micro-Controller Port

significantly different rated capacities.

•

12-Pin 2,5 mm

×

4,0 mm SON Package

TYPICAL APPLICATION

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this document.

Impedance Track is a trademark of Texas Instruments.
I

2

C is a trademark of Philips Electronics.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2007, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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Summary

Page 3 - DEVICE INFORMATION; AVAILABLE OPTIONS; TERMINAL FUNCTIONS; System-Side Impedance TrackTM Fuel Gauge

www.ti.com 2 DEVICE INFORMATION 2.1 AVAILABLE OPTIONS 2.2 PIN DIAGRAMS BAT V SS SRN SRP V CC BAT_GD SDA SCL 1 2 3 4 5 6 12 11 10 9 8 7 BAT_LOW _ TS 1 2 3 4 5 6 12 11 10 9 8 7 BI/TOUT BAT V SS V CC BAT_LOW _ TS BI/TOUT NC SRN SRP BAT_GD SDA SCL RID bq27500 bq27501 2.3 TERMINAL FUNCTIONS bq27500bq2750...

Page 4 - ABSOLUTE MAXIMUM RATINGS; C, Typical Values at T

www.ti.com 3 ELECTRICAL SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS 3.2 RECOMMENDED OPERATING CONDITIONS 3.3 POWER-ON RESET bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 over operating free-air temperature range (unless otherwise noted) (1) PARAMETER VALUE UNIT V CC ...

Page 5 - C and V

www.ti.com 3.4 INTERNAL TEMPERATURE SENSOR CHARACTERISTICS 3.5 HIGH FREQUENCY OSCILLATOR 3.6 LOW FREQUENCY OSCILLATOR 3.7 INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS 3.8 ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPT...

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