IC BATT FUEL GAUGE LIION 12DSBGA

BQ27505YZGT-J1

Manufacturer Part NumberBQ27505YZGT-J1
DescriptionIC BATT FUEL GAUGE LIION 12DSBGA
ManufacturerTexas Instruments
SeriesImpedance Track™
BQ27505YZGT-J1 datasheet
 


Specifications of BQ27505YZGT-J1

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
Output Voltage0.4 VOperating Supply Voltage2.5 V
Supply Current5 mAMaximum Operating Temperature+ 85 C
Minimum Operating Temperature- 40 CMounting StyleSMD/SMT
Temperature MonitoringYesLead 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
• 400KHz I
C™ Interface for Connection to
System Microcontroller Port
• In a 12-Pin NanoFree™ (CSP) Packaging
Management
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
400KHz 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.
Check for Samples:
bq27505
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
microcontroller firmware development. The bq27505
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
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
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
VCC
Voltage
PACK+
Sense
Battery
Low
Temp
I2C
DATA
Sense
Power
T
bq27505
Controller
PACK-
BAT_GD
Current
Sense
SOC _INT
bq27505
SLUS884 – FEBRUARY 2009
device
requires
little
system
remaining
battery
capacity
(mAh),
to
a
removable
battery
pack
Single Cell Li-lon
Battery Pack
PROTECTION
IC
CHG
FETs
DSG
Copyright © 2009, Texas Instruments Incorporated
or

BQ27505YZGT-J1 Summary of contents

  • Page 1

    ... In a 12-Pin NanoFree™ (CSP) Packaging Management 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 400KHz trademark of Philips Electronics. ...

  • Page 2

    ... COMMUNICATIONS 7 ..... INTERFACE 2 7 Time Out Command Waiting time 9 7.4 PACKAGE INFORMATION 10 8 REFERENCE SCHEMATICS 19 8.1 SCHEMATIC Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com ...... 20 .................................. 21 ............. 21 .......................... 21 ........................ 23 ................................... 23 .............. 24 .................... 26 ................ 30 .............. 30 ........................................ 30 ................................... 31 ................................ 32 ............................... 33 ......... Copyright © 2009, Texas Instruments Incorporated ...

  • Page 3

    ... DEVICE INFORMATION 2.1 AVAILABLE OPTIONS FIRMWARE PART NUMBER VERSION bq27505YZGR-J1 2.07 bq27505YZGT-J1 (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 YZG q = 89°C/W JA (1) Measured with high-K board ...

  • Page 4

    ... C serial communications data line for communication with system (Master). Open-drain 2 C serial communications clock input line for communication with system (Master). Use Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com CSP-12 (BOTTOM VIEW Table 5-5. Open Copyright © 2009, Texas Instruments Incorporated ...

  • Page 5

    ... Input voltage range (SRP, SRN Input leakage current (I/O pins) lkg t Power-up communication delay PUCD (1) Specified by design. Not production tested. Copyright © 2009, Texas Instruments Incorporated (1) = 25°C and V = 2.5 V (unless otherwise noted TEST CONDITIONS Fuel gauge in NORMAL mode. I > Sleep Current LOAD Fuel gauge in SLEEP+ mode ...

  • Page 6

    ... A MIN TYP MAX UNIT 32.768 kHz –1.5% 0.25% 1.5% –2.5% 0.25% 2.5% –4% 0.25% 4% 500 ms = 25°C. A MIN TYP MAX UNIT –0.125 0.125 bits 10 mV ±0.007 ±0.034 % FSR 2.5 MΩ 0.3 mA Copyright © 2009, Texas Instruments Incorporated ...

  • Page 7

    ... DFERASE t Instruction flash master erase time IFERASE (1) t Flash page erase time PGERASE (1) Specified by design. Not production tested Copyright © 2009, Texas Instruments Incorporated = 25°C and V = 2.5 V (unless otherwise noted TEST CONDITIONS (1) bq27505 not measuring cell voltage (1) bq27505 measuring cell voltage = 25° ...

  • Page 8

    ... V = 2.5 V (unless otherwise noted TEST CONDITIONS 2 C-Compatible Interface Timing Diagrams Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com MIN TYP MAX UNIT 300 ns 300 ns 600 ns 1.3 ms 600 ns 600 ns 100 600 400 kHz Copyright © 2009, Texas Instruments Incorporated ...

  • Page 9

    ... Register bits and flags: brackets and italics, e.g., [TDA] Data flash bits: brackets, italics and bold, e.g., [LED1] Modes and states: ALL CAPITALS, e.g., UNSEALED mode. Copyright © 2009, Texas Instruments Incorporated MANUFACTURER INFORMATION = 10.0kΩ ±1%. B25/85 = 3435K ± 1% (such as Semitec ...

  • Page 10

    ... R 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, Texas Instruments Incorporated ...

  • Page 11

    ... SEALED 0x0020 IT_ENABLE 0x0021 IT_DISABLE 0x0023 CAL_MODE 0x0040 RESET 0x0041 Copyright © 2009, Texas Instruments Incorporated Table 4-2. Table 4-2. Control( ) Subcommands SEALED ACCESS Yes Reports the status of DF checksum, hibernate, IT, etc. Yes Reports the device type (eg: bq27505) Yes Reports the firmware version on the device type ...

  • Page 12

    ... Instructs the fuel gauge to compute the coulomb counter offset with internal short and then without internal 12 GENERAL DESCRIPTION Table 4-3. CONTROL_STATUS Bit Definitions bit5 bit4 bit3 SS CSV CCA SNOOZE SLEEP LDMD Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com bit2 bit1 bit0 BCA OCVCMDCOMP OCVFAIL RUP_DIS VOK QEN Copyright © 2009, 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, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): ...

  • Page 14

    ... This read-word function returns an unsigned integer value of the temperature in units of 0.1 K 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. 14 GENERAL DESCRIPTION Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com ...

  • Page 15

    ... AverageCurrent( ). The computation accounts for the taper current time extension from the linear 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, Texas Instruments Incorporated Table 4-4. Flags Bit Definitions bit5 ...

  • 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, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com ...

  • Page 17

    ... AuthenticateCheckSum( )/BlockData( ) 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, Texas Instruments Incorporated Table 4-5. Table 4-5. Extended Data Commands COMMAND CODE RSVD 0x34 ...

  • Page 18

    ... 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, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com SEALED UNSEALED (1) (2) (1) (2) ACCESS ACCESS N/A R ...

  • Page 19

    ... None of the data written to memory are bounded by the bq27505 – 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. The written data is persistent power-on reset does resolve the fault. Copyright © 2009, Texas Instruments Incorporated Section Submit Documentation Feedback ...

  • 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, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com ...

  • Page 21

    ... Temp High Temp Configuration 32 Hysteresis Configuration 34 Charge Configuration 34 Charge Copyright © 2009, Texas Instruments Incorporated 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. Table 4-7. Data Flash Summary ...

  • Page 22

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

  • Page 23

    ... The initial Qmax values are taken from a cell manufacturers' data sheet multiplied by the number of parallel cells also used for the value in Design Capacity. The bq27505 acquires and updates the battery-impedance profile during normal battery usage. It uses this profile, along Copyright © 2009, Texas Instruments Incorporated Data Offset ...

  • Page 24

    ... User_Rate-mA: Use the value in User_Rate-mA. This mode provides a completely user-configurable method. If Load Mode = 1 (Constant Power) then the following options shown in 24 FUNCTIONAL DESCRIPTION Current Model Used Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com Table 5-2 ...

  • Page 25

    ... OCV readings to and that the current is not be higher than C/20 when attempting to go into relaxation mode. Quit Relax Time specifies the minimum time required for AverageCurrent remain above the QuitCurrent threshold before exiting relaxation mode. Copyright © 2009, Texas Instruments Incorporated Power Model Used Table 4-7 Submit Documentation Feedback ...

  • Page 26

    ... Some bq27505 pins are configured via the Operation Configuration data flash register, as indicated in Table 5-3. This register is programmed/read via the methods described in Data Flash. The register is located at subclass = 64, offset = 0. 26 FUNCTIONAL DESCRIPTION Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com Section ...

  • Page 27

    ... The BAT_LOW pin provides a system processor with an electrical indicator of battery status. The signaling on the BAT_LOW pin follows the status of the [SOC1] bit in the Flags( ) register. Note that the polarity of the BAT_LOW pin can be inverted via the [BATL_POL] bit of Operation Configuration. Copyright © 2009, Texas Instruments Incorporated bit5 bit4 ...

  • Page 28

    ... Product Folder Link(s): bq27505 www.ti.com Exit From SLEEP Flags [BAT_DET Exit From SLEEP | AverageCurrent > Sleep Current OR Current is Detected above I WAKE Exit From SLEEP+ Any communication to the gauge OR OR Current is Detected above I WAKE Entry to SLEEP+ Control Status[SNOOZE Copyright © 2009, Texas Instruments Incorporated ...

  • Page 29

    ... After Initialization Command OCV INT_FOCV bit is set in Command OpConfig Copyright © 2009, Texas Instruments Incorporated Pulse Width Comment During charge, when the SOC reaches (≥) the points × SOC_Delta and 100%; During discharge, when the SOC is less than (<) the points × ...

  • Page 30

    ... At that time, the bq27505 samples the temperature. This saves battery energy when operating from battery, as periodic temperature updates are avoided during charging mode. 30 FUNCTIONAL DESCRIPTION Section 4.1.1, Standard Data Commands, for Section Table 4-7. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com 8, Reference Schematic. ...

  • Page 31

    ... In the event that a battery is removed from the system while a charger is present (and powering the gauge), 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. Copyright © 2009, Texas Instruments Incorporated Figure 5-1. ...

  • Page 32

    ... 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. 32 FUNCTIONAL DESCRIPTION 2 C Communication that is not directed to the gauge Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com ...

  • Page 33

    ... In addition to the default profiles, the bq27505 maintains two abbreviated profiles: Cell0 and Cell1. These tables hold dynamic battery data, and keep track of the status for up to two of the most recent batteries used. In most cases the bq27505 can administrate information on two removable battery packs. Copyright © 2009, Texas Instruments Incorporated Table 5-6. I Threshold Settings ...

  • Page 34

    ... Pack1 profile, overwriting the oldest Packn profile. 34 APPLICATION-SPECIFIC INFORMATION Table 6-1. ApplicationStatus( ) Bit Definitions. bit5 bit4 bit3 — — — Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com bit2 bit1 bit0 — — LU_ PROF Copyright © 2009, Texas Instruments Incorporated ...

  • Page 35

    ... The following command sequences are not supported: Attempt to write a read-only address (NACK after data sent by master): Attempt to read an address above 0x6B (NACK command): Copyright © 2009, Texas Instruments Incorporated 2 C read, incremental read, quick read, one byte write, and incremental bq27505 generated ...

  • Page 36

    ... DATA [7:0] A DATA [7:0] A ADDR [6: DATA [7: ADDR [6: DATA [7: Table 7-1. YZG Package Dimensions D Min = 2400mm Max = 2460mm Submit Documentation Feedback Product Folder Link(s): bq27505 www.ti.com 2 C operation, a proper waiting time DATA [7: DATA [7: Min = 1926mm Max = 1986mm Copyright © 2009, Texas Instruments Incorporated ...

  • Page 37

    ... Not Recommended for New Designs www.ti.com 8 REFERENCE SCHEMATICS 8.1 SCHEMATIC Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): bq27505 bq27505 SLUS884 – FEBRUARY 2009 REFERENCE SCHEMATICS 37 ...

  • Page 38

    ... PACKAGING INFORMATION (1) Orderable Device Status BQ27505YZGR-J1 NRND BQ27505YZGT-J1 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. 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 39

    TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ27505YZGR-J1 DSBGA YZG PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 12 3000 180.0 8.4 2.1 Pack Materials-Page 1 29-May-2009 ...

  • Page 40

    Device Package Type BQ27505YZGR-J1 DSBGA PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) YZG 12 3000 Pack Materials-Page 2 29-May-2009 Width (mm) Height (mm) 220.0 220.0 34.0 ...

  • Page 41

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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’ ...