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Texas Instruments bq27500 Instrukcja Użytkownika Strona 1

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www.ti.com
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
bq27500/1
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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Podsumowanie treści

Strona 1 - 1 INTRODUCTION

www.ti.com1 INTRODUCTION1.1 FEATURES 1.2 APPLICATIONS1.3 DESCRIPTIONHostSystemSingleCellLi-IonBatteryPackPACK-PROTECTIONICCHGDSGTempSenseBatteryGo

Strona 2 - Contents

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.1.1 Control( ): 0x00/0x01Issuing a Control( ) command requi

Strona 3 - 2 DEVICE INFORMATION

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.1.1.3 FW_VERSION: 0x0002Instructs the fuel gauge to return

Strona 4 - 3 ELECTRICAL SPECIFICATIONS

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.1.1.15 CAL MODE: 0x0040This command instructs the fuel gaug

Strona 5 - 3.6 LOW FREQUENCY OSCILLATOR

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.1.7 NominalAvailableCapacity( ): 0x0c/0x0dThis read-only co

Strona 6

www.ti.com4.1.2 EXTENDED DATA COMMANDSbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.1.16 MaxLoadCurrent( ): 0x1e/0x

Strona 7 - Figure 3-1. I

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Table 4-5. Extended Data Commands (continued)COMMAND SEALED UNS

Strona 8 - 4 GENERAL DESCRIPTION

www.ti.com4.2 DATA FLASH INTERFACE4.2.1 ACCESSING THE DATA FLASHbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 20074.1.2.7 D

Strona 9 - 4.1.1 STANDARD DATA COMMANDS

www.ti.com4.3 MANUFACTURER INFORMATION BLOCKS4.4 ACCESS MODES4.5 SEALING/UNSEALING DATA FLASHbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS

Strona 10 - SLUS785 – SEPTEMBER 2007

www.ti.com4.6 DATA FLASH SUMMARYbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Both the sets of keys for each level are

Strona 11

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Table 4-7. Data Flash Summary (continued)Subclass Data Min Max

Strona 12

www.ti.comContentsbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007These devices have limited built-in ESD protection. The

Strona 13

www.ti.com5 FUNCTIONAL DESCRIPTION5.1 FUEL GAUGINGbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Table 4-7. Data Flash S

Strona 14 - 4.1.2 EXTENDED DATA COMMANDS

www.ti.com5.2 IMPEDANCE TRACK™ VARIABLESbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007The bq27500/1 has several data fl

Strona 15

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Dsg Current ThresholdThis register is used as a threshold by ma

Strona 16 - 4.2 DATA FLASH INTERFACE

www.ti.com5.3 DETAILED DESCRIPTION OF DEDICATED PINS5.3.1 The Operation Configuration Register5.3.2 Pin Function Code Descriptions5.3.3 BAT_LOW Pin5.3

Strona 17 - 4.4 ACCESS MODES

www.ti.com5.3.5 Battery Detection Using the BI/TOUT Pinbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007for the fuel gauge

Strona 18 - 4.6 DATA FLASH SUMMARY

www.ti.comStartInit(“BAT_GD”disabled, OCVtaken, “BAT_GDenabled.)EndNoBattPresent-OR- badbatt(“BAT_GD”disabled)BattPresentSLEEPNORMALYesBatteryVol

Strona 19 - (1) bq27501 only

www.ti.com5.4 TEMPERATURE MEASUREMENT5.5 OVERTEMPERATURE INDICATION5.5.1 Overtemperature: Charge5.5.2 Overtemperature: Discharge5.6 CHARGING AND CHARG

Strona 20 - 5 FUNCTIONAL DESCRIPTION

www.ti.com5.7 POWER MODES5.7.1 NORMAL MODE5.7.2 SLEEP MODE5.7.3 BAT INSERT CHECK MODEbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SE

Strona 21

www.ti.comExitFromSLEEP| AverageCurrent () | >SleepCurrentORCurrentisDetectedaboveIWAKEEntryToHIBERNATEHosthasset ControlStatus[HIBERN

Strona 22

www.ti.com5.8 POWER CONTROL5.8.1 RESET FUNCTIONSStorechecksumActiveRAMchanged?GenerateNewchecksumvalueYESNOGenerate ActiveRAMchecksumvalueDothe

Strona 23 - 5.3.3 BAT_LOW Pin

www.ti.com2 DEVICE INFORMATION2.1 AVAILABLE OPTIONS2.2 PIN DIAGRAMSBATVSSSRNSRPVCCBAT_GDSDASCL123456121110987BAT_LOW_TS123456121110987BI/TOUTBATVSSVCC

Strona 24

www.ti.com5.8.2 WAKE-UP COMPARATOR5.8.3 FLASH UPDATES5.9 AUTOCALIBRATIONbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007T

Strona 25

www.ti.com6 APPLICATION-SPECIFIC INFORMATION6.1 BATTERY PROFILE STORAGE AND SELECTION6.1.1 General Profile Description6.1.2 Activities Upon Pack Inser

Strona 26

www.ti.com6.2.2 Battery With Resistor ID (bq27501 Only)bq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007impedance is measu

Strona 27 - 5.7.3 BAT INSERT CHECK MODE

www.ti.com7 COMMUNICATIONS7.1 I2C INTERFACE(a)1-bytewrite (b)quickread(c)1-byteread(d)incrementalread(S=Start,Sr=RepeatedStart, A = Ackn

Strona 28 - 5.7.4 HIBERNATE MODE

www.ti.com8 REFERENCE SCHEMATICS8.1 SCHEMATICbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007REFERENCE SCHEMATICS34 Submi

Strona 29 - 5.8.1 RESET FUNCTIONS

PACKAGING INFORMATIONOrderable Device Status(1)PackageTypePackageDrawingPins PackageQtyEco Plan(2)Lead/Ball Finish MSL Peak Temp(3)BQ27500DRZR ACTIVE

Strona 30 - 5.9 AUTOCALIBRATION

Strona 31

Strona 32

Strona 33 - 7 COMMUNICATIONS

IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements,improvemen

Strona 34 - 8 REFERENCE SCHEMATICS

www.ti.com3 ELECTRICAL SPECIFICATIONS3.1 ABSOLUTE MAXIMUM RATINGS3.2 RECOMMENDED OPERATING CONDITIONS3.3 POWER-ON RESETbq27500bq27501System-Side Imped

Strona 35 - PACKAGE OPTION ADDENDUM

www.ti.com3.4 INTERNAL TEMPERATURE SENSOR CHARACTERISTICS3.5 HIGH FREQUENCY OSCILLATOR3.6 LOW FREQUENCY OSCILLATOR3.7 INTEGRATING ADC (COULOMB COUNTER

Strona 36

www.ti.com3.9 DATA FLASH MEMORY CHARACTERISTICS3.10 I2C-COMPATIBLE INTERFACE COMMUNICATION TIMING CHARACTERISTICSbq27500bq27501System-Side Impedance T

Strona 37

www.ti.combq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007Figure 3-1. I2C-Compatible Interface Timing DiagramsSubmit Docu

Strona 38

www.ti.com4 GENERAL DESCRIPTIONbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007The bq27500/1 accurately predicts the batt

Strona 39 - IMPORTANT NOTICE

www.ti.com4.1 DATA COMMANDS4.1.1 STANDARD DATA COMMANDSbq27500bq27501System-Side Impedance Track™ Fuel GaugeSLUS785 – SEPTEMBER 2007The bq27500/1 uses

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