BQ27505YZGT-J4

Manufacturer Part NumberBQ27505YZGT-J4
DescriptionIC BATT FUEL GAUGE LIION 12DSBGA
ManufacturerTexas Instruments
SeriesImpedance Track™
BQ27505YZGT-J4 datasheet
 


Specifications of BQ27505YZGT-J4

FunctionFuel, Gas Gauge/MonitorBattery TypeLithium-Ion (Li-Ion)
Voltage - Supply2.4 V ~ 2.6 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case12-UFBGA, WLCSP
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-25794-2
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System-Side Impedance Track™ Fuel Gauge
1 INTRODUCTION
1.1
FEATURES
• Battery Fuel Gauge for 1-Series Li-Ion
123
Applications
• Resides on System Main Board
– Works With Embedded or Removable
Battery Packs
• Microcontroller Peripheral Provides:
– Accurate Battery Fuel Gauging
– Internal Temperature Sensor for Battery
Temperature Reporting
– Battery Low Interrupt Warning
– Battery Insertion Indicator
– Configurable Level of State of Charge (SOC)
Interrupts
– State of Health 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 mΩ or Less)
2
• 400-kHz I
C™ Interface for Connection to
System Microcontroller Port
• In a 12-Pin NanoFree™ (CSP) Packaging
1
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 data sheet.
Impedance Track, NanoFree are trademarks of Texas Instruments.
2
I2C is a trademark of Philips Electronics.
3
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.
1.2
APPLICATIONS
Smartphones and PDAs
Digital Still and Video Cameras
Handheld Terminals
MP3 or Multimedia Players
1.3
DESCRIPTION
The
system-side Li-Ion battery fuel gauge is a
microcontroller peripheral that provides fuel
gauging for single-cell Li-Ion battery packs.
The
micro-controller firmware development. The
bq27505-J4 resides on the system’s main
board and manages an embedded battery
(nonremovable) or a removable battery pack.
The bq27505-J4 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), temperature (°C)
and state of health(%).
Battery fuel gauging with the bq27505-J4
requires only PACK+ (P+), PACK– (P–), and
Thermistor (T) connections to a removable
battery pack or embedded battery circuit. The
CSP option is a 12-ball package in the
dimensions of 2.43mm × 1.96mm with 0.5mm
lead pitch. It is ideal for space constrained
applications.
Host System
LDO
VCC
Voltage
PACK+
Sense
Battery
Low
Temp
I2C
DATA
Sense
Power
T
Management
bq27505
Controller
PACK-
BAT_GD
Current
Sense
SOC _INT
Figure 1-1. Typical Application
bq27505-J4
SLVSA40 – DECEMBER 2009
Texas
Instruments
bq27505-J4
device
requires
little
system
Single Cell Li-lon
Battery Pack
PROTECTION
IC
CHG
FETs
DSG
Copyright © 2009, Texas Instruments Incorporated

BQ27505YZGT-J4 Summary of contents

  • Page 1

    ... In a 12-Pin NanoFree™ (CSP) Packaging 1 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 data sheet. Impedance Track, NanoFree are trademarks of Texas Instruments. 2 I2C is a trademark of Philips Electronics. 3 PRODUCTION DATA information is current as of publication date ...

  • Page 2

    ... POWER CONTROL 5.9 AUTOCALIBRATION 5 6 APPLICATION-SPECIFIC INFORMATION 6.1 BATTERY PROFILE STORAGE AND SELECTION ............ ...................................................... 6 ..... 6.2 APPLICATION-SPECIFIC FLOW AND CONTROL 6 ...................................................... 7 COMMUNICATIONS REFERENCE SCHEMATICS 7 8.1 SCHEMATIC Submit Documentation Feedback www.ti.com ............................. .................................. ........................ .................................. ............. .......................... ........................ ................................... .............. .................... ................ .............. ........................................ ................................... ................................ ............................... ......... ................................... .................................... C INTERFACE ........................................ C Time Out ......................... ........................................ Copyright © 2009, Texas Instruments Incorporated ...... ...

  • Page 3

    ... DEVICE INFORMATION 2.1 AVAILABLE OPTIONS FIRMWARE PART NUMBER VERSION bq27505YZGR-J4 2.24 bq27505YZGT-J4 (1) 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.ti.com. 2.2 DISSIPATION RATINGS PACKAGE THERMAL RESISTANCE θ YZG = 89° ...

  • Page 4

    ... V – 0 – 0.5 CC –0.3 0.6 –0.3 0.6 1 – 0.125 SS V – 0.125 SS V – 0.125 0.125 SS 0.3 250 Copyright © 2009, Texas Instruments Incorporated UNIT °C °C °C UNIT V μA μA μA μ μA ms ...

  • Page 5

    ... INL Integral nonlinearity error (1) Z Effective input resistance IN(SR) (1) I Input leakage current lkg(SR) (1) Specified by design. Not tested in production. Copyright © 2009, Texas Instruments Incorporated = 25°C and V = 3.6 V (unless otherwise noted) A BAT TEST CONDITIONS CC = 25°C and TEST CONDITIONS = 25°C and V ...

  • Page 6

    ... Submit Documentation Feedback www.ti.com = 2.5 V (unless otherwise noted) MIN TYP MAX –0.2 1 125 100 0.3 = 2.5 V (unless otherwise noted) MIN TYP MAX 10 20,000 Copyright © 2009, Texas Instruments Incorporated UNIT V ms bits mV MΩ MΩ kΩ μA UNIT Years Cycles ms mA ...

  • Page 7

    ... Setup time for stop su(STOP) t Bus free time between stop and start (BUF) f Clock frequency SCL Figure 3-1. I Copyright © 2009, Texas Instruments Incorporated = 25°C and V = 2.5 V (unless otherwise noted TEST CONDITIONS = 25°C and V = 2.5 V (unless otherwise noted TEST CONDITIONS ...

  • Page 8

    ... Data flash bits: brackets, italics and bold, e.g., [LED1] Modes and states: ALL CAPITALS, e.g., UNSEALED mode. 8 GENERAL DESCRIPTION MANUFACTURER INFORMATION = 10.0 kΩ ±1%. B25/85 = 3435K ± 1% (such as Semitec 25 POWER MODES. NOTE Submit Documentation Feedback www.ti.com BLOCKS. Copyright © 2009, Texas Instruments Incorporated ...

  • Page 9

    ... TimeToEmpty( ) TimeToFull( ) StandbyCurrent( ) StandbyTimeToEmpty( ) MaxLoadCurrent( ) MaxLoadTimeToEmpty( ) AvailableEnergy( ) AveragePower( ) TTEatConstantPower( ) StateOfHealth() StateOfCharge( ) NormalizedImpedanceCal( ) InstaneousCurrent Reading( ) Copyright © 2009, Texas Instruments Incorporated Table 4-1. Standard Commands COMMAND CODE CNTL 0x00 / 0x01 AR 0x02 / 0x03 ARTTE 0x04 / 0x05 TEMP 0x06 / 0x07 VOLT 0x08 / 0x09 FLAGS ...

  • Page 10

    ... Forces a Factory Restore of learned resistance and Qmax to defaults No Places the bq27505-J4 in SEALED access mode No Enables the Impedance Track™ algorithm No Places the bq27505-J4 in calibration mode No Forces a full reset of the bq27505-J4 Submit Documentation Feedback www.ti.com DESCRIPTION Copyright © 2009, Texas Instruments Incorporated ...

  • Page 11

    ... This function is only available when the fuel gauge is UNSEALED. When SEALED, this command only reads back the board-offset value stored in data flash. Copyright © 2009, Texas Instruments Incorporated Table 4-3. CONTROL_STATUS Bit Definitions bit5 ...

  • Page 12

    ... Instructs the fuel gauge to reset learned resistance tables and Qmax values to the default values. SOC_INT is asserted while the restore is in progress. If gauge is sealed, the restore unsealed code must be sent before the factory restore command. 12 GENERAL DESCRIPTION Submit Documentation Feedback www.ti.com Copyright © 2009, Texas Instruments Incorporated ...

  • Page 13

    ... This read-only function returns an unsigned integer value of the temperature in units of 0.1K measured by the fuel gauge. 4.1.1.5 Voltage( ): 0x08/0x09 This read-word function returns an unsigned integer value of the measured cell-pack voltage in mV with a range 6000 mV. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback bq27505-J4 SLVSA40 – DECEMBER 2009 GENERAL DESCRIPTION 13 ...

  • Page 14

    ... A value of 65,535 indicates the battery is not being charged. 14 GENERAL DESCRIPTION Table 4-4. Flags Bit Definitions bit5 bit4 bit3 – – CHG_INH OCV_GD WAIT_ID BAT_DET Submit Documentation Feedback www.ti.com bit2 bit1 bit0 XCHG FC CHG SOC1 SYSDOWN DSG Copyright © 2009, Texas Instruments Incorporated ...

  • Page 15

    ... This read-only function returns an unsigned integer value of the predicted remaining operating time if the battery is discharged at the AveragePower( ) value in minutes. A value of 65,535 indicates AveragePower The fuel gauge automatically updates TimeToEmptyatContantPower( ) based on the AveragePower( ) value every 1 s. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback bq27505-J4 SLVSA40 – DECEMBER 2009 ...

  • Page 16

    ... A/DF 0x40…0x53 ACKS/DFD 0x54 DFD 0x40…0x5f Submit Documentation Feedback www.ti.com SEALED UNSEALED UNITS (1) (2) ACCESS ACCESS N mAh R R N/A N/A R/W N/A R/W R/W N/A R/W R/W N/A R/W R/W N/A R R/W Copyright © 2009, Texas Instruments Incorporated (1) (2) ...

  • Page 17

    ... UNSEALED Access: This command is used to control data flash access mode. Writing 0x00 to this command enables BlockData access general data flash. Writing a 0x01 to this command enables SEALED mode operation of DataFlashBlock( ). SEALED Access: This command is not available in SEALED mode. Copyright © 2009, Texas Instruments Incorporated Extended Data Commands (continued) COMMAND CODE ...

  • Page 18

    ... Writing an incorrect value may result in hardware failure due to firmware program interpretation of the invalid data. The written data is persistent power-on reset does resolve the fault. 18 GENERAL DESCRIPTION Submit Documentation Feedback www.ti.com DATA COMMANDS. These Copyright © 2009, Texas Instruments Incorporated ...

  • Page 19

    ... When in SEALED mode, the CONTROL_STATUS [SS] bit is set, but when the UNSEAL keys are correctly received by the bq27505-J4, the [SS] bit is cleared. When the full-access keys are correctly received, then the CONTROL_STATUS [FAS] bit is cleared. Copyright © 2009, Texas Instruments Incorporated Table 4-6. Data Flash refers to those data flash locations, Table 4-6 ...

  • Page 20

    ... Num 0 16384 0 Num Copyright © 2009, Texas Instruments Incorporated ...

  • Page 21

    ... Gas Gauging 82 State Gas Gauging 82 State Gas Gauging 82 State Gas Gauging 82 State Gas Gauging 82 State Copyright © 2009, Texas Instruments Incorporated Data Flash Summary (continued) Offset Name Data Type 21 Def Avg I Last Run I2 23 Def Avg P Last Run I2 1 Full Reset Counter U1 0 ...

  • Page 22

    ... Copyright © 2009, Texas Instruments Incorporated – – – – – ...

  • Page 23

    ... Reserve Cap-mAh Reserve Cap-mAh determines how much actual remaining capacity exists after reaching 0 RemainingCapacity( ), before Terminate Voltage is reached. A no-load rate of compensation is applied to this reserve. Copyright © 2009, Texas Instruments Incorporated Current Model Used Power Model Used Submit Documentation Feedback bq27505-J4 SLVSA40 – ...

  • Page 24

    ... Preparing Optimized Default Flash Constants for specific Battery Types (SLUA334). Bit 0 is updated as needed by the bq27505-J4. 24 FUNCTIONAL DESCRIPTION Table 4-7 Submit Documentation Feedback www.ti.com Table 4-7, which should be Table 4-7, which should be and should be above the standby Copyright © 2009, Texas Instruments Incorporated ...

  • Page 25

    ... Table 5-3. This register is programmed/read via the methods described in FLASH. The register is located at subclass = 64, offset = 0. Copyright © 2009, Texas Instruments Incorporated Description Average variance from steady state voltage used to determine end of discharge voltage Last instantaneous change in voltage from steady state used to determine end of discharge ...

  • Page 26

    ... SOCI_POL Table bit4 bit3 GNDSEL BattGdInit Charge Inhibit, for additional details. Submit Documentation Feedback bit2 bit1 IWAKE RSNS1 BATG_POL BATL_POL 5-6). Default is 0/0/1. ACCESSING THE bit2 bit1 DFWrIndBL – Copyright © 2009, Texas Instruments Incorporated www.ti.com bit0 RSNS0 TEMPS bit0 – ...

  • Page 27

    ... CELL System Shutdown Figure 5-1 details how the /BAT_GD pin functions in the context of battery insertion and removal, as well as NORMAL vs. SLEEP modes. Copyright © 2009, Texas Instruments Incorporated POR BAT INSERT CHECK Check for battery insertion from HALT state. No gauging ...

  • Page 28

    ... SOC_INT is used to indicate the data flash update. The gauge will wait DFWrIndWaitTime times 5μs after the SOC_INT signal to start the data flash update. This function is disabled if DFWrIndWaitTime is set to 0. Asserted while dataflash learned Ra tables and Qmax are overwritten with defaults. Submit Documentation Feedback www.ti.com Copyright © 2009, Texas Instruments Incorporated ...

  • Page 29

    ... HIBERNATE. In NORMAL mode, the bq27505-J4 is fully powered and can execute any allowable task. In SLEEP+ mode, both low frequency and high frequency oscillators are active. Although the SLEEP+ has higher current consumption than the SLEEP mode also a reduced power mode. In SLEEP mode, the Copyright © 2009, Texas Instruments Incorporated STANDARD DATA REFERENCE Table 4-7 ...

  • Page 30

    ... The bq27505-J4 exits SLEEP+ if any entry condition is broken, specifically when (1) any communication activity with the gauge, or (2) AverageCurrent( ) rises above Sleep Current, or (3) a current in excess of I through R is detected. WAKE SENSE 30 FUNCTIONAL DESCRIPTION Figure 5-1. through R WAKE Submit Documentation Feedback www.ti.com is detected. SENSE Copyright © 2009, Texas Instruments Incorporated ...

  • Page 31

    ... LDO dropout. The value of Flash Update OK Voltage should be selected such that the bq27505-J4 V voltage does not fall below its minimum of 2.4 V during Flash write operations. CC Copyright © 2009, Texas Instruments Incorporated 2 C Communication that is not directed to the gauge Table 5-6. I ...

  • Page 32

    ... Packn, and the default profiles, Defn, for the same SOC (the letter n depicts either 1).The [INITCOMP] bit will be set afterwards and the OCV command could be issued. 32 APPLICATION-SPECIFIC INFORMATION Submit Documentation Feedback www.ti.com Copyright © 2009, Texas Instruments Incorporated ...

  • Page 33

    ... ADDR[6: ADDR[6: CMD [7:0] S ADDR[6: Start , Sr = Repeated Start , A = Acknowledge , Acknowledge , and P = Stop). Copyright © 2009, Texas Instruments Incorporated Table 6-1. ApplicationStatus( ) Bit Definitions bit5 bit4 — — — read, incremental read, quick read, one byte write, and bq27505 generated A DATA [7:0] ...

  • Page 34

    ... Waiting time between continuous reading results 34 COMMUNICATIONS 2 C engine will enter the low power sleep mode. A DATA [7:0] A DATA [7:0] A ADDR [6: DATA [7: ADDR [6: DATA [7: Submit Documentation Feedback www.ti.com 2 C operation, a proper waiting time DATA [7: DATA [7:0] A Copyright © 2009, Texas Instruments Incorporated ...

  • Page 35

    ... REFERENCE SCHEMATICS 8.1 SCHEMATIC Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback bq27505-J4 SLVSA40 – DECEMBER 2009 REFERENCE SCHEMATICS 35 ...

  • Page 36

    ... PACKAGING INFORMATION (1) Orderable Device Status BQ27505YZGR-J4 ACTIVE BQ27505YZGT-J4 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. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

  • Page 37

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ27505YZGR-J4 DSBGA YZG BQ27505YZGR-J4 DSBGA YZG BQ27505YZGT-J4 DSBGA YZG BQ27505YZGT-J4 DSBGA YZG PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 12 3000 180.0 8.4 2.1 ...

  • Page 38

    ... Device Package Type BQ27505YZGR-J4 DSBGA BQ27505YZGR-J4 DSBGA BQ27505YZGT-J4 DSBGA BQ27505YZGT-J4 DSBGA PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) YZG 12 3000 YZG 12 3000 YZG 12 250 YZG 12 250 Pack Materials-Page 2 20-Jul-2010 Width (mm) Height (mm) 190.5 212.7 31.8 220.0 220 ...

  • Page 39

    X: Max = 2480 mm, Min = 2379 mm Y: Max = 2006 mm, Min = 1906 mm ...

  • Page 40

    ... 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’ ...