BQ27505YZGR-J3

Manufacturer Part NumberBQ27505YZGR-J3
DescriptionIC LI-ION FUEL GAUGE 12DSBGA
ManufacturerTexas Instruments
SeriesImpedance Track™
BQ27505YZGR-J3 datasheet
 


Specifications of BQ27505YZGR-J3

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 Compliant  
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Not Recommended for New Designs
www.ti.com
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
• Uses PACK+, PACK–, and T Battery Terminals
• 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
Power
Management
Controller
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
2
I
C 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.
SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010
1.2
APPLICATIONS
Smartphones
PDAs
Digital Still and Video Cameras
Handheld Terminals
MP3 or Multimedia Players
1.3
DESCRIPTION
The Texas Instruments bq27505 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 micro-
controller
firmware
resides on the system’s main board and manages an
embedded battery (non-removable) or a removable
battery pack.
The bq27505 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 requires only
PACK+ (P+), PACK– (P–), and Thermistor (T)
connections
to
a
embedded battery circuit. The CSP option is a 12-ball
package in the dimensions of 2,43 mm × 1,96 mm
with 0,5 mm lead pitch. It is ideal for space
constrained applications.
TYPICAL APPLICATION
Host System
LDO
Single Cell Li-lon
Battery Pack
VCC
Voltage
PACK+
Sense
Battery
Low
Temp
I2C
DATA
Sense
T
bq27505
PACK-
FETs
BAT_GD
Current
Sense
SOC _INT
Copyright © 2009–2010, Texas Instruments Incorporated
bq27505-J3
development.
The
bq27505
removable
battery
pack
or
PROTECTION
IC
CHG
DSG

BQ27505YZGR-J3 Summary of contents

  • Page 1

    ... Power Management Controller 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 trademark of Philips Electronics. 3 PRODUCTION DATA information is current as of publication date. ...

  • Page 2

    ... BATTERY PROFILE STORAGE AND SELECTION ...................................................... 6.2 APPLICATION-SPECIFIC FLOW AND CONTROL 5 ...................................................... ............ 7 COMMUNICATIONS 6 ..... INTERFACE 2 7 Time Out Command Waiting Time 8 8 REFERENCE SCHEMATICS 10 8.1 SCHEMATIC 19 Revision History Submit Documentation Feedback www.ti.com ...... .................................. ............. .......................... ........................ ................................... .............. .................... ................ .............. ........................................ ................................... ................................ ............................... ......... ................................... .................................... ........................................ ........................ ......................... ........................................ ............................................ Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 3

    ... Not Recommended for New Designs www.ti.com 2 DEVICE INFORMATION 2.1 AVAILABLE OPTIONS PART NUMBER FIRMWARE VERSION bq27505YZGR-J3 2.20 bq27505YZGT-J3 (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 ...

  • Page 4

    ... MIN TYP MAX UNIT 2.4 2.5 2.6 114 0.4 V – 0 – 0.5 CC –0.3 0.6 –0.3 0.6 1 1.2 0.3 V – 0.125 – 0.125 – 0.125 0.125 SS 0.3 mA 250 ms Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 5

    ... Effective input resistance IN(SR) (1) I Input leakage current lkg(SR) (1) Specified by design. Not tested in production. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 = 25°C and V = 3.6 V (unless otherwise noted) BAT TEST CONDITIONS CC = 25°C and ...

  • Page 6

    ... V (unless otherwise noted TEST CONDITIONS (1) (1) (1) (1) Submit Documentation Feedback www.ti.com MIN TYP MAX UNIT –0 125 bits MΩ 8 MΩ 100 kΩ 0.3 mA MIN TYP MAX UNIT 10 Years 20,000 Cycles 200 ms 200 Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 7

    ... Bus free time between stop and start (BUF) f Clock frequency SCL Figure 3-1. I Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 = 25°C and V = 2.5 V (unless otherwise noted TEST CONDITIONS 2 C-Compatible Interface Timing Diagrams ...

  • 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 = 10.0kΩ ±1%. B25/85 = 3435K ± 1% (such as Semitec 25 POWER MODES. NOTE Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com BLOCKS. ...

  • Page 9

    ... Not Recommended for New Designs www.ti.com Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Submit Documentation Feedback bq27505-J3 GENERAL DESCRIPTION 9 ...

  • Page 10

    ... R/W N/A R R/W mAh R R/W mAh R R/W mAh R R/W mAh R R R/W Minutes R R/W Minutes R R R/W Minutes R R R/W Minutes R R/W mWh R R R/W Minutes R R num R R R/W mohm R R R/W Copyright © 2009–2010, Texas Instruments Incorporated 4-1. ...

  • Page 11

    ... IT_ENABLE 0x0021 IT_DISABLE 0x0023 CAL_MODE 0x0040 RESET 0x0041 Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Table 4-2. Table 4-2. Control( ) Subcommands SEALED ACCESS Yes Reports the status of DF checksum, hibernate, IT, etc. Yes ...

  • Page 12

    ... The difference between the two measurements is 12 GENERAL DESCRIPTION Table 4-3. CONTROL_STATUS Bit Definitions bit5 bit4 bit3 SS CSV CCA SNOOZE SLEEP LDMD Submit Documentation Feedback www.ti.com bit2 bit1 bit0 BCA OCVCMDCOMP OCVFAIL RUP_DIS VOK QEN Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 13

    ... Instructs the fuel gauge to set the CONTROL_STATUS [SNOOZE] bit to 0. This will disable the SLEEP+ mode. The gauge will exit from the SLEEP+ power mode after the SNOOZ bit is cleared. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 ...

  • Page 14

    ... Write temperature to the gauge when the [WRTEMP 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. 14 GENERAL DESCRIPTION Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 15

    ... TTF computation based on a fixed AverageCurrent( ) rate of charge accumulation. A value of 65,535 indicates the battery is not being charged. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Table 4-4. Flags Bit Definitions ...

  • Page 16

    ... 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 GENERAL DESCRIPTION Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 17

    ... BlockData( ) BlockDataCheckSum( ) (1) SEALED and UNSEALED states are entered via commands to Control() 0x00/0x01. (2) In sealed mode, data flash CANNOT be accessed through commands 0x3e and 0x3f. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Table 4-5. ...

  • Page 18

    ... SEALED Access: This command is not available in SEALED mode. 18 GENERAL DESCRIPTION COMMAND UNITS CODE DFDCNTL 0x61 N/A DNAMELEN 0x62 N/A DNAME 0x63...0x69 N/A APPSTAT 0x6a N/A RSVD 0x6b...0x7f N/A Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com SEALED UNSEALED (1) (2) (1) (2) ACCESS ACCESS N/A R ...

  • Page 19

    ... 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. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Section ...

  • Page 20

    ... Upon successful writing of checksum information to BlockDataChecksum( ), the modified block is returned to data flash. Note: Manufacturer Info Block A is read-only when in SEALED mode. 20 GENERAL DESCRIPTION Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 21

    ... Configuration 32 Hysteresis Configuration 34 Charge Configuration 34 Charge Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Table 4-6. Data Flash refers to those data flash locations, Table 4-6. Data Flash Access Data Flash R/W R/W None Table 4-2 subcommands ...

  • Page 22

    ... Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 23

    ... The bq27505 measures the cell voltage, temperature, and current to determine battery SOC. The bq27505 monitors charge and discharge activity by sensing the voltage across a small-value resistor Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Data ...

  • Page 24

    ... Average current: based on AverageCurrent Current: based off of a low-pass-filtered version of AverageCurrent = Design capacity / 5: C Rate based off of Design Capacity / C/5 rate in mA. 24 FUNCTIONAL DESCRIPTION Current Model Used Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 25

    ... Either of the following criteria must be met to enter relaxation mode: • | AverageCurrent < | Quit Current | for Dsg Relax Time • | AverageCurrent < | Quit Current | for Chg Relax Time Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Power Model Used Table 4-7 Submit Documentation Feedback ...

  • Page 26

    ... 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 voltage Value in Min Delta Voltage used Unused Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 27

    ... When the PFC is set to 0, only the bq27505 measures battery temperature under discharge and relaxation conditions. The charger does not receive any information from the bq27505 about the temperature readings, and therefore operates open-loop with respect to battery temperature. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 bit5 ...

  • Page 28

    ... The Operation Configuration [BATG_POL] bit can be used to set the polarity of the battery good signal, should the default configuration need to be changed. 28 FUNCTIONAL DESCRIPTION Section 5.6.2, Charge Inhibit and Suspend, for additional Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 29

    ... This state is detected by the fuel gauge, which polls this pin every second when the gauge has power. A battery-disconnected status is assumed when the bq27505 reads a thermistor voltage that is near 2.5V. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 POR ...

  • Page 30

    ... Programmmable time SOC_INT is used to indicate the data flash update. The gauge will wait pluse flash erase and DFWrIndWaitTime times 5ms after the SOC_INT signal to start the write time data flash update. This function is disabled if DFWrIndWaitTime is set to 0. Submit Documentation Feedback www.ti.com Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 31

    ... The [XCHG] bit is cleared once the battery temperature returns to the range [Charge Inhibit Temp Low + Temp Hys, Charge Inhibit Temp High – Temp Hys]. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Section 4 ...

  • Page 32

    ... Impedance Track™ updates are not necessary. Hence, the fuel gauge enters a state that checks for battery insertion and does not continue executing the Impedance Track™ algorithm. 32 FUNCTIONAL DESCRIPTION Figure 5-1. through R WAKE SENSE Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com is detected. ...

  • Page 33

    ... Configuration also uses the [IWAKE] bit to select one of two possible voltage threshold ranges for the given sense resistor selection. An internal interrupt is generated when the threshold is breached in either the charge or discharge direction. Setting both [RSNS1] and [RSNS0 disables this feature. Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 2 ...

  • Page 34

    ... In most cases the bq27505 can administrate information on two removable battery packs. 34 APPLICATION-SPECIFIC INFORMATION Table 5-6. I Threshold Settings WAKE IWAKE Vth(SRP–SRN 1 –1 2 –2 2 –2 4 –4 4 –4 9 –9.8 mV Submit Documentation Feedback www.ti.com (1) Disabled Disabled Copyright © 2009–2010, Texas Instruments Incorporated ...

  • Page 35

    ... Pack0 or Pack1, the battery pack is deemed new (none of the previously used packs). Either Def0/Def1 profile is copied into either the Pack0 or Pack1 profile, overwriting the oldest Packn profile. Copyright © 2009–2010, Texas Instruments Incorporated Table 6-1. ApplicationStatus( ) Bit Definitions. bit5 ...

  • Page 36

    ... A DATA [7: CMD [7:0] A ADDR[6:0] Sr (c) 1- byte read A ADDR[6: DATA [7:0] Sr (d) incremental read A CMD[7:0] A DATA [7:0] (e) incremental write Submit Documentation Feedback www.ti.com ADDR[6: DATA [7:0] N (b) quick read 1 A DATA [7: DATA [7: DATA [7: Copyright © 2009–2010, Texas Instruments Incorporated P P ...

  • Page 37

    ... S ADDR [6: CMD [7:0] DATA [7:0] A DATA [7:0] Waiting time between continuous reading results Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 2 C bus is held low for the time defined DATA [7:0] A DATA [7:0] A ADDR [6:0] ...

  • Page 38

    ... Not Recommended for New Designs SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 8 REFERENCE SCHEMATICS 8.1 SCHEMATIC 38 REFERENCE SCHEMATICS Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback www.ti.com ...

  • Page 39

    ... NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from * Revision (11-2009 Revision .......................................................................................................... Page • Changed firmware version in available options from 2.15 to 2.20 • Changed BattGdInit to BG_INIT in Copyright © 2009–2010, Texas Instruments Incorporated SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010 Revision History ............................................................. ................................................................................... Table 5-4 ...

  • Page 40

    ... PACKAGING INFORMATION Orderable Device (1) Package Type Package Status BQ27505YZGR-J3 NRND DSBGA BQ27505YZGT-J3 NRND DSBGA (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 41

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ27505YZGR-J3 DSBGA YZG BQ27505YZGT-J3 DSBGA YZG BQ27505YZGT-J3 DSBGA YZG PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 12 3000 180.0 8.4 2.1 12 250 180.0 8.4 2 ...

  • Page 42

    ... Device Package Type BQ27505YZGR-J3 DSBGA BQ27505YZGT-J3 DSBGA BQ27505YZGT-J3 DSBGA PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) YZG 12 3000 YZG 12 250 YZG 12 250 Pack Materials-Page 2 9-Oct-2010 Width (mm) Height (mm) 190.5 212.7 31.8 190.5 212.7 31.8 220.0 220.0 ...

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    ... 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’ ...