IC BATT FUEL GAUGE LI-ION 12SON

BQ27500DRZT-V100

Manufacturer Part NumberBQ27500DRZT-V100
DescriptionIC BATT FUEL GAUGE LI-ION 12SON
ManufacturerTexas Instruments
SeriesImpedance Track™
BQ27500DRZT-V100 datasheet
 


Specifications of BQ27500DRZT-V100

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 GaugesOperating Supply Voltage2.5 V
Maximum Operating Temperature+ 80 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTFor Use With296-23174 - EVAL MODULE FOR BQ2750X
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-23401-2
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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
Two Varieties
– bq27500: Uses PACK+, PACK–, and T
Battery Terminals
– bq27501: Works With Battery ID Resistor in
Battery Pack
Microcontroller Peripheral Provides:
– Accurate Battery Fuel Gauging
– Internal Temperature Sensor for System
Temperature Reporting
– Battery Low Interrupt Warning
– Battery Insertion Indicator
– Battery ID Detection
– 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 bq27500/01 system-side
Li-Ion battery fuel gauge is a microcontroller
peripheral that provides fuel gauging for single-cell
Li-Ion battery packs. The device requires little system
microcontroller
bq27500/01 resides on the system main board, and
manages an embedded battery (non-removable) or a
removable battery pack.
The bq27500/01 uses the patented Impedance
Track™ algorithm for fuel gauging, and provides
information such as remaining battery capacity
(mAh), state-of-charge (%), run-time to empty (min.),
battery voltage (mV), and temperature ( C).
Battery fuel gauging with the bq27500 requires only
PACK+ (P+), PACK– (P–), and Thermistor (T)
connections
embedded
battery.
or Less)
identification resistors in battery packs to gauge
batteries of different fundamental chemistries and/or
significantly different rated capacities.
TYPICAL APPLICATION
Host System
LDO
Voltage
PACK+
Sense
Battery
RID
Low
Sense*
Warning
Temp
2
Sense
I C
bq27500/1
Battery
PACK–
Good
Current
Sense
bq27500
bq27501
SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008
firmware
development.
to
a
removable
battery
pack
The
bq27501
works
Single-Cell Li-Ion
Battery Pack
RID
Protection
IC
T
CHG
FETs
DSG
*bq27501 Only
Copyright © 2007–2008, Texas Instruments Incorporated
The
or
with

BQ27500DRZT-V100 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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 .......................................... 1 INTRODUCTION ........................................... 1.1 FEATURES ...................................... 1.2 APPLICATIONS ....................................... 1.3 DESCRIPTION ................................. 2 DEVICE INFORMATION ............................... 2.1 AVAILABLE OPTIONS ...................................... 2.2 PIN DIAGRAMS ............................. ...

  • Page 3

    ... V1.06 bq27500DRZT bq27500DRZR-V100 V1.08 bq27500DRZT-V100 bq27501DRZR V1.08 bq27501DRZT (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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 3 ELECTRICAL SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) PARAMETER V Supply voltage range CC V Open-drain I/O pins ...

  • Page 5

    DISSIPATION RATINGS PACKAGE (1) 12-pin DRZ (1) This data is based on using a four-layer JEDEC high-K board with the exposed die pad connected pad on the board. The board pad is connected to the ...

  • Page 6

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 3.8 INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS T = – 2.4 V < V < 2.6 V; typical values ...

  • Page 7

    I C-COMPATIBLE INTERFACE COMMUNICATION TIMING CHARACTERISTICS (continued – 2.4 V < V < 2.6 V; typical values PARAMETER t Data hold time h(DAT) t Setup time for stop ...

  • Page 8

    ... Section 4.3, Manufacturer Information Blocks. The key to the high-accuracy fuel gauging prediction of the bq27500/1 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 bq27500/1 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 Table 4-1. Because ...

  • Page 10

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 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( ...

  • 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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 4.1.1.1.14 SEALED: 0x0020 Instructs the fuel gauge to transition from the UNSEALED state to the SEALED state. The fuel gauge must always be set to ...

  • 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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 The register value is updated every 1 second when the measured current is above the Deadband (3-mA default) and is less than or equal to ...

  • 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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 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 ...

  • Page 17

    None of the data written to memory are bounded by the bq27500/1– 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 SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 When in SEALED mode, the CONTROL_STATUS [SS] bit is set, but when the unseal keys are correctly received by the bq27500/1, the [SS] bit is ...

  • Page 19

    Table 4-7. Data Flash Summary (continued) Subclass Class Subclass ID Manufacturer System Data 57 Info Manufacturer System Data 57 Info Configuration 64 Registers Configuration 64 Registers Configuration 64 Registers Configuration 64 Registers Configuration 68 Power Configuration 68 Power Configuration ...

  • Page 20

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 Table 4-7. Data Flash Summary (continued) Subclass Class Subclass ID Calibration 104 Data Calibration 104 Data Calibration 104 Data Calibration 104 Data Calibration 104 Data ...

  • Page 21

    Load Mode Load Mode is used to select either the constant-current or constant-power model for the Impedance Track™ algorithm as used in Load Select (see Load Select). When Load Mode is 0, the Constant Current model is used ...

  • Page 22

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 5.2.6 Chg Current Threshold This register is used as a threshold by many functions in the bq27500/1 to determine if actual charge current is flowing ...

  • Page 23

    Delta Voltage The bq27500/1 stores the maximum difference of Voltage( ) during short load spikes and normal load, so the Impedance Track™ algorithm can calculate remaining capacity for pulsed loads not recommended to change this value. ...

  • Page 24

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 5.3.4 Power Path Control With the BAT_GD Pin The bq27500/1 must operate in conjunction with other electronics in a system appliance, such as chargers and ...

  • Page 25

    NORMAL IT Operations (dsg, chg, rlx) Yes Bad batt detected? No Yes Batt removed? No Forced Yes SLEEP mode? No Figure 5-1. BAT_GD Pin Operation, Based Upon Battery Presence and bq27500 Operating Mode Submit Documentation Feedback System-Side Impedance Track™ ...

  • Page 26

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 5.4 TEMPERATURE MEASUREMENT The bq27500/1 measures battery temperature via its TS input, in order to supply battery temperature status information to the fuel gauging algorithm ...

  • Page 27

    POWER MODES The bq27500/1 has four power modes: NORMAL, SLEEP, HIBERNATE, and BAT INSERT CHECK. In NORMAL mode, the bq27500/1 is fully powered and can execute any allowable task. In SLEEP mode, the fuel gauge exists in a ...

  • Page 28

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 Exit From HIBERNATE Battery Removed Exit From HIBERNATE Communication Activity AND Comm address is for bq27500/1 bq27500/1 clears Control Status [HIBERNATE Recommend Host ...

  • Page 29

    It is important that BAT_GD be set to disable status (no battery charging/discharging). This prevents a charger application from inadvertently charging the battery before an OCV reading can be taken the system’s responsibility to wake the bq27500/1 ...

  • Page 30

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 5.8.2 WAKE-UP COMPARATOR The wake up comparator is used to indicate a change in cell current while the bq27500 either SLEEP or HIBERNATE ...

  • Page 31

    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 bq27500/01, the fuel gauge maintains some of the battery information in case the battery ...

  • Page 32

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 Impedance Measurement). The bq27500 chooses the profile which is closest to the measured impedance, starting with the Packn profiles. That is, if the measured impedance ...

  • Page 33

    COMMUNICATIONS 2 7 INTERFACE The 27500/1 supports the standard I incremental write functions. The 7 bit device address (ADDR) is the most significant 7 bits of the hex address and is fixed as 1010101. The 8-bit ...

  • Page 34

    System-Side Impedance Track™ Fuel Gauge SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008 8 REFERENCE SCHEMATICS 8.1 SCHEMATIC 34 REFERENCE SCHEMATICS www.ti.com Submit Documentation Feedback ...

  • Page 35

    ... NRND BQ27500DRZR-V100G4 NRND BQ27500DRZR-V120 NRND BQ27500DRZR-V120G4 NRND BQ27500DRZRG4 NRND BQ27500DRZT NRND BQ27500DRZT-V100 NRND BQ27500DRZT-V100G4 NRND BQ27500DRZT-V120 NRND BQ27500DRZT-V120G4 NRND BQ27501DRZR ACTIVE BQ27501DRZT ACTIVE (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 36

    TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release event shall TI's liability arising out of such information ...

  • Page 37

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ27500DRZR SON DRZ BQ27500DRZR-V100 SON DRZ BQ27500DRZT SON DRZ BQ27500DRZT-V100 SON DRZ BQ27500DRZT-V120 SON DRZ BQ27501DRZR SON DRZ BQ27501DRZT SON DRZ PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel ...

  • Page 38

    ... Device Package Type BQ27500DRZR SON BQ27500DRZR-V100 SON BQ27500DRZT SON BQ27500DRZT-V100 SON BQ27500DRZT-V120 SON BQ27501DRZR SON BQ27501DRZT SON PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DRZ 12 3000 DRZ 12 3000 DRZ 12 250 DRZ 12 250 DRZ 12 250 DRZ ...

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  • Page 42

    ... 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’ ...