IC BATT FUEL GAUGE LI-ION 12SON

BQ27500DRZR-V120

Manufacturer Part NumberBQ27500DRZR-V120
DescriptionIC BATT FUEL GAUGE LI-ION 12SON
ManufacturerTexas Instruments
SeriesImpedance Track™
BQ27500DRZR-V120 datasheet
 


Specifications of BQ27500DRZR-V120

FunctionFuel, Gas Gauge/MonitorBattery TypeLithium-Ion (Li-Ion)
Voltage - Supply2.4 V ~ 2.6 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case12-VFDFN Exposed Pad
ProductFuel GaugesOutput Voltage2 V
Operating Supply Voltage2.5 VSupply Current114 uA
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTFor Use With296-23174 - EVAL MODULE FOR BQ2750X
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-23896-2
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1 INTRODUCTION
1.1 FEATURES
Battery Fuel Gauge for 1-Series Li-Ion
Applications
Resides on System Main Board
– Works with Embedded or Removable
Battery Packs
Uses PACK+, PACK–, and T Battery Terminals
Microcontroller Peripheral Provides:
– Accurate Battery Fuel Gauging
– Internal Temperature Sensor for System
Temperature Reporting
– Battery Low Interrupt Warning
– Battery Insertion Indicator
– 96 Bytes of Non-Volatile Scratch-Pad
FLASH
Battery Fuel Gauge Based on Patented
Impedance Track™ Technology
– Models the Battery Discharge Curve for
Accurate Time-to-Empty Predictions
– Automatically Adjusts for Battery Aging,
Battery Self-Discharge, and
Temperature/Rate Inefficiencies
– Low-Value Sense Resistor (10 m
2
I
C™ Interface for Connection to System
Microcontroller Port
12-Pin 2,5-mm
4-mm SON Package
Power
Management
Controller
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.
2
I
C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
System-Side Impedance Track™ Fuel Gauge
1.2
APPLICATIONS
Smartphones
PDAs
Digital Still and Video Cameras
Handheld Terminals
MP3 or Multimedia Players
1.3
DESCRIPTION
The Texas Instruments bq27500 system-side Li-Ion
battery fuel gauge is a microcontroller peripheral that
provides fuel gauging for single-cell Li-Ion battery
packs.
The
microcontroller firmware development. The bq27500
resides on the system main board, and manages an
embedded battery (non-removable) or a removable
battery pack.
The bq27500 uses the patented Impedance Track™
algorithm for fuel gauging, and provides information
such
as
remaining
state-of-charge (%), run-time to empty (min.), battery
or Less)
voltage (mV), and temperature ( C).
Battery fuel gauging with the bq27500 requires only
PACK+ (P+), PACK– (P–), and Thermistor (T)
connections
embedded battery.
TYPICAL APPLICATION
Host System
LDO
Voltage
PACK+
Sense
Battery
Low
Warning
Temp
Sense
2
I C
bq27500
Battery
PACK–
Good
Current
Sense
bq27500-V120
SLUS880 – OCTOBER 2008
device
requires
little
system
battery
capacity
(mAh),
to
a
removable
battery
pack
Single-Cell Li-Ion
Battery Pack
Protection
IC
T
CHG
FETs
DSG
Copyright © 2008, Texas Instruments Incorporated
or

BQ27500DRZR-V120 Summary of contents

  • Page 1

    ... Management Controller 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 trademark of Philips Electronics. PRODUCTION DATA information is current as of publication date. ...

  • Page 2

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the ...

  • Page 3

    ... FIRMWARE PART NUMBER (1) VERSION bq27500DRZR-V120 1.20 bq27500DRZT-V120 (1) Ordering the device with the latest firmware version is recommended. To check the fiirmware revision and Errata list see (2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www ...

  • Page 4

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 PIN (1) TYPE NAME NO. SDA 10 I/O SRN 8 IA SRP ELECTRICAL SPECIFICATIONS 3.1 ABSOLUTE ...

  • Page 5

    RECOMMENDED OPERATING CONDITIONS (continued - Typical values PARAMETER Input voltage (OD), low (SDA, SCL Input voltage, low (BI/TOUT) Input voltage (OD), high (SDA, SCL Input voltage, ...

  • Page 6

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 LOW-FREQUENCY OSCILLATOR (continued – 2.4 V < V < 2.6 V; typical values PARAMETER (1) (2) f Frequency error LEIO ...

  • Page 7

    I C-COMPATIBLE INTERFACE COMMUNICATION TIMING CHARACTERISTICS T = – 2.4 V < V < 2.6 V; typical values PARAMETER t SCL/SDA rise time r t SCL/SDA fall time f ...

  • Page 8

    ... Section 4.3, Manufacturer Information Blocks. The key to the high-accuracy fuel gauging prediction of the bq27500 is Texas Instruments' proprietary Impedance Track™ algorithm. This algorithm uses cell measurements, characteristics, and properties to create state-of-charge predictions that can achieve less than 1% error across a wide variety of operating conditions and over the lifetime of the battery ...

  • Page 9

    DATA COMMANDS 4.1.1 STANDARD DATA COMMANDS The bq27500 uses a series of 2-byte standard commands to enable system reading and writing of battery information. Each standard command has an associated command-code pair, as indicated in Because each command ...

  • Page 10

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 4.1.1.1 Control( ): 0x00/0x01 Issuing a Control( ) command requires a subsequent 2-byte subcommand. These additional bytes specify the particular control function desired. The Control( ) command allows the system ...

  • Page 11

    DEVICE_TYPE: 0x0001 Instructs the fuel gauge to return the device type to addresses 0x00/0x01. 4.1.1.1.3 FW_VERSION: 0x0002 Instructs the fuel gauge to return the firmware version to addresses 0x00/0x01. 4.1.1.1.4 HW_VERSION: 0x0003 Instructs the fuel gauge to return ...

  • Page 12

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 4.1.1.1.14 ENABLE SLEEP+ MODE: 0x0013 Instructs the fuel gauge to set the CONTROL_STATUS [SNOOZE] bit bit to 1. This will enable the SLEEP+ mode. The gauge will enter SLEEP+ power ...

  • Page 13

    High byte OTC OTD Low byte – – OTC = Overtemperature in charge condition is detected. True when set. OTD = Overtemperature in discharge condition is detected. True when set. CHG_INH = Charge inhibit: unable to begin ...

  • Page 14

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 The register value is updated every 1 second when the measured current is above the Deadband in Table 4-7 and is less than or equal to 2 are not averaged ...

  • Page 15

    NAME Reserved DesignCapacity( ) (2) DataFlashClass( ) (2) DataFlashBlock( ) BlockData( ) BlockDataCheckSum( ) BlockDataControl( ) DeviceNameLength( ) DeviceName( ) ApplicationStatus( ) Reserved (1) SEALED and UNSEALED states are entered via commands to CNTL 0x00/0x01. (2) In sealed mode, ...

  • Page 16

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 4.1.2.6 BlockDataControl( ): 0x61 UNSEALED Access: This command is used to control data flash access mode. Writing 0x00 to this command enables BlockData access general data flash. Writing ...

  • Page 17

    None of the data written to memory are bounded by the bq27500– the values are not rejected by the fuel gauge. Writing an incorrect value may result in hardware failure due to firmware program interpretation of the invalid data. ...

  • Page 18

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 Both the sets of keys for each level are 2 bytes each in length and are stored in data flash. The unseal key (stored at Unseal Key 0 and Unseal ...

  • Page 19

    Table 4-7. Data Flash Summary (continued) Subclass Class Subclass ID Configuration 68 Power Configuration 68 Power Configuration 68 Power Configuration 68 Power Fuel Gauging 80 IT Cfg Fuel Gauging 80 IT Cfg Fuel Gauging 80 IT Cfg Fuel Gauging ...

  • Page 20

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 Table 4-7. Data Flash Summary (continued) Subclass Class Subclass ID Calibration 107 Current Security 112 Codes Security 112 Codes Security 112 Codes Security 112 Codes 5 FUNCTIONAL DESCRIPTION 5.1 FUEL ...

  • Page 21

    Load Select Load Select defines the type of power or current model to be used to compute load-compensated capacity in the Impedance Track™ algorithm. If Load Mode = 0 (Constant-Current) then the options presented in Table 5-1 are ...

  • Page 22

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 5.2.7 Quit Current, DSG Relax Time, CHG Relax Time, and Quit Relax Time The Quit Current is used as part of the Impedance Track™ algorithm to determine when the bq27500 ...

  • Page 23

    Default Ra and Ra Tables These tables contain encoded data and, with the exception of the Default Ra Tables, are automatically updated during device operation. No user changes should be made except for reading/writing the values from a ...

  • Page 24

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 5.3.4 Power Path Control with the BAT_GD Pin The bq27500 must operate in conjunction with other electronics in a system appliance, such as chargers or other ICs and application circuits ...

  • Page 25

    Overtemperature: Discharge If during discharging, Temperature( ) reaches the threshold of OT Dsg for a period of OT Dsg Time, and AverageCurrent( ) –Dsg Current Threshold, then the [OTD] bit of Flags set. When Temperature( ) ...

  • Page 26

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 Exit From HIBERNATE Battery Removed Exit From HIBERNATE Communication Activity AND Comm address is for bq27500 bq27500 clears Control Status [HIBERNATE Recommend Host also set Control Status [HIBERNATE] ...

  • Page 27

    SLEEP+ MODE Compared to the SLEEP mode, SLEEP+ mode has the high frequency oscillator in operation. The communication delay could be eliminated. The SLEEP+ is entered automatically if the feature is enabled (Operation Configuration [SNOOZE and ...

  • Page 28

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 5.8 POWER CONTROL 5.8.1 RESET FUNCTIONS When the bq27500 detects software reset ([RESET] bit of Control( ) initiated), it increments the corresponding counter. This information is accessible by issuing the ...

  • Page 29

    APPLICATION-SPECIFIC INFORMATION 6.1 BATTERY PROFILE STORAGE AND SELECTION 6.1.1 Common Profile Aspects When a battery pack is removed from host equipment that implements the bq27500, the fuel gauge maintains some of the battery information in case the battery ...

  • Page 30

    System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 with the Packn profiles. That is, if the measured impedance matches Pack0, then the Pack0 profile is used. If the measured impedance matches Pack1, then the Pack1 profile is used. ...

  • Page 31

    REFERENCE SCHEMATICS 8.1 SCHEMATIC Submit Documentation Feedback bq27500-V120 System-Side Impedance Track™ Fuel Gauge SLUS880 – OCTOBER 2008 REFERENCE SCHEMATICS 31 ...

  • Page 32

    ... PACKAGING INFORMATION (1) Orderable Device Status BQ27500DRZR-V120 NRND BQ27500DRZR-V120G4 NRND BQ27500DRZT-V120 NRND BQ27500DRZT-V120G4 NRND (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. ...

  • Page 33

    TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ27500DRZT-V120 SON DRZ PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 12 250 330.0 12.4 2.8 Pack Materials-Page 1 13-Apr-2011 ...

  • Page 34

    Device Package Type BQ27500DRZT-V120 SON PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DRZ 12 250 Pack Materials-Page 2 13-Apr-2011 Width (mm) Height (mm) 340.5 333.0 20.6 ...

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  • Page 38

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...