Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge indicator Li-Ion SON 12 (2.5x4) Surface-mount

HostSystem

PACK-

Single-CellLi-ion

BatteryPack

CHG

DSG

Temp

Sense

Battery

Good

Current

Sense

PACK+

Voltage

Sense

Battery

Low

Warning

FETs

I C

LDO

REG25

REGIN

VCC

DATA

bq27510-G2

Power

Management

Controller

PROTECTION

bq27510-G2

www.ti.com

SLUS948 –AUGUST 2010

System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

FEATURES

APPLICATIONS

• Smartphones

• Battery Fuel Gauge for 1-Series Li-Ion

Applications

• PDAs

• Digital Still and Video Cameras

• Resides on System Main Board

• Handheld Terminals

– Works with Embedded or Removable

• MP3 or Multimedia Players

Battery Packs

– Uses PACK+, PACK–, and T Battery

DESCRIPTION

Terminals

– Can be Powered Directly From Battery Pack The Texas Instruments bq27510-G2 system-side

Li-Ion battery fuel gauge is a microcontroller

(no LDO required)

peripheral that provides fuel gauging for single-cell

• Microcontroller Peripheral Provides:

Li-Ion battery packs. The device requires little system

– Accurate Battery Fuel Gauging

microcontroller firmware development. The

bq27510-G2 resides on the system’s main board and

– Battery Low Interrupt Warning

manages an embedded battery (non-removable) or a

– Battery Insertion Indicator

removable battery pack.

– 64 Bytes of Non-Volatile Scratch Pad

The bq27510-G2 uses the patented Impedance

FLASH

Track™ algorithm for fuel gauging, and provides

• Battery Fuel Gauging Based on Patented

information such as remaining battery capacity

Impedance Track™ Technology

(mAh), state-of-charge (%), run-time to empty (min.),

– Models Battery Discharge Curve for

battery voltage (mV), and temperature (°C).

Accurate Time-To-Empty Predictions

Battery fuel gauging with the bq27510-G2 requires

– Automatically Adjusts for Battery Aging,

only PACK+ (P+), PACK– (P–), and Thermistor (T)

Battery Self-Discharge, and

connections to a removable battery pack or

Temperature/Rate Inefficiencies

embedded battery.

– Low-Value Sense Resistor (10 mΩ or less)

• I

C™ for Connection to System

Microcontroller Port

• Small 12-pin 2,5 mm × 4 mm SON Package

TYPICAL APPLICATION

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.

2Impedance Track is a trademark of Texas Instruments.

C is a trademark of Phillips Corporation.

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.

Summary of content (38 pages)

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bq27510-G2 www.ti.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com 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 MOS gates.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) VALUE UNIT –0.3 to 24 V –0.3 to 2.75 V –0.3 to 6 V –0.3 to 6 V –0.3 to VCC + 0.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com RECOMMENDED OPERATING CONDITIONS (continued) TA = 25°C, VCC = 2.5 V (unless otherwise noted) PARAMETER VA3 Input voltage range (SRP, SRN) tPUCD Power-up communication delay TA Operating free-air temperature range 2.5 V LDO TEST CONDITION MIN TYP MAX VSS–0.125 0.125 250 UNIT V ms –40 85 °C (1) TA = 25°C, CREG = 0.47 mF, VREGIN = 3.6 V (unless otherwise noted) PARAMETER MIN NOM MAX 2.7 V ≤ VREGIN ≤ 5.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 LOW FREQUENCY OSCILLATOR TA = –40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted) PARAMETER fOSC tSXO (1) (2) (3) MIN TYP Operating frequency Frequency error (1) fEIO TEST CONDITIONS Start-up time MAX UNIT 32.768 (2) KHz TA = 0°C to 60°C –1.5% 0.25% 1.5% TA = –20°C to 70°C –2.5% 0.25% 2.5% TA = –40°C to 85°C -4.0% 0.25% 4.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com 400 kHz I2C-COMPATIBLE INTERFACE COMMUNICATION TIMING CHARACTERISTICS TA = –40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tr SCL/SDA rise time 300 ns tf SCL/SDA fall time 300 ns tw(H) SCL pulse width (high) 600 ns tw(L) SCL pulse width (low) 1.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 GENERAL DESCRIPTION The bq27510-G2 accurately predicts the battery capacity and other operational characteristics of a single Li-based rechargeable cell. It can be interrogated by a system processor to provide cell information, such as state-of-charge (SOC), time-to-empty (TTE) and time-to-full (TTF). Information is accessed through a series of commands, called Standard Commands. Further capabilities are provided by the additional Extended Commands set.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com DATA COMMANDS Standard Data Commands The bq27510-G2 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 1. Because each command consists of two bytes of data, two consecutive I2C transmissions must be executed both to initiate the command function, and to read or write the corresponding two bytes of data.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 Table 2.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com DF_CHECKSUM: 0x0004 Instructs the fuel gauge to compute the checksum of the data flash memory. The checksum value is written and returned to addresses 0x00/0x01 (UNSEALED mode only). The checksum will not be calculated in SEALED mode; however, the checksum value can still be read.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 CAL_MODE: 0x0040 This command instructs the fuel gauge to enter calibration mode. This command is only available when the fuel gauge is UNSEALED. RESET : 0x0041 This command instructs the fuel gauge to perform a full reset. This command is only available when the fuel gauge is UNSEALED.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com SOCF = State-of-Charge-Threshold Final (SOCF Set %) reached. True when set. DSG = Discharging detected. True when set. NominalAvailableCapacity( ): 0x0c/0x0d This read-only command pair returns the uncompensated (no load or light load) battery capacity remaining. Units are mAh. FullAvailableCapacity( ): 0x0e/0x0f This read-only command pair returns the uncompensated (no load or light load) capacity of the battery when fully charged. Units are mAh.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 MaxLoadCurrent( ): 0x1e/0x1f This read-only function returns a signed integer value, in units of mA, of the maximum load conditions. The MaxLoadCurrent( ) is an adaptive measurement which is initially reported as the maximum load current programmed in Initial Max Load Current. If the measured current is ever greater than Initial Max Load Current, then MaxLoadCurrent( ) updates to the new current.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com Table 5. Extended Commands (continued) NAME DeviceNameLength( ) DeviceName( ) ApplicationStatus( ) Reserved COMMAND CODE UNITS SEALED ACCESS (1) (2) UNSEALED ACCESS (1) (2) DNAMELEN 0x62 N/A R R DNAME 0x63...0x69 N/A R R APPSTAT 0x6a N/A R R RSVD 0x6b...0x7f N/A R R DesignCapacity( ): 0x3c/0x3d SEALED and UNSEALED Access: This command returns the value is stored in Design Capacity and is expressed in mAh.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 ApplicationStatus( ): 0x6a This byte function allows the system to read the bq27510-G2 Application Status data flash location. Refer to Table 6 for specific bit definitions. Reserved – 0x6b – 0x7f DATA FLASH INTERFACE Accessing the Data Flash The bq27510-G2 data flash is a non-volatile memory that contains bq27510-G2 initialization, default, cell status, calibration, configuration, and user information.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com As an example, the data flash location for Manufacturer Info Block B is defined as having a Subclass = 58 and an Offset = 32 through 63 (32 byte block). The specification of Class = System Data is not needed to address Manufacturer Info Block B, but is used instead for grouping purposes when viewing data flash info in the bq27510-G2 evaluation software.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 DATA FLASH SUMMARY Table 7 summarizes the data flash locations available to the user, including their default, minimum, and maximum values. Table 7. Data Flash Summary Class Subclass ID Subclass Offset Configuration 2 Safety 0 Configuration 2 Safety 2 Configuration 2 Safety Configuration 2 Configuration 2 Configuration Name Data Type Min Value Max Value Default Value Units OT Chg I2 0 1200 550 0.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com Table 7.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 FUNCTIONAL DESCRIPTION FUEL GAUGING The bq27510-G2 measures the cell voltage, temperature, and current to determine battery SOC. The bq27510-G2 monitors charge and discharge activity by sensing the voltage across a small-value resistor (5 mΩ to 20 mΩ typ.) between the SRP and SRN pins and in series with the cell. By integrating charge passing through the battery, the battery’s SOC is adjusted during battery charge or discharge.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com 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 8 are available. Table 8.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 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 bq27510-G2 enters relaxation mode from a current flowing mode in either the charge direction or the discharge direction. The value of Quit Current is set to a default value of 40 mA and should be above the standby current of the system. Either of the following criteria must be met to enter relaxation mode: 1.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com 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 pre-learned pack (part of the process for creating golden image files).
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 A PFC of 1 is like a PFC of 0, except the BAT_LOW/BAT_GD pin is used to signal temperature thresholds during charge. If charging temperature falls outside of the preset range defined in data flash, a charger can be disabled via the BAT_LOW/BAT_GD pin, until cell temperature recovers. See Charge Inhibit for additional details. Finally when the PFC is set to 2, the battery thermistor can be shared between the fuel gauge and the charger.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com Start Bq27500 POR No Batt detected? Yes Init (“BAT_GD” disabled, OCV taken, “BAT_GD enabled.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 The recommended thermistor circuit uses an external 103AT-type thermistor. Additional circuit information for connecting this thermistor to the bq27510-G2 is shown in REFERENCE SCHEMATIC. OVER-TEMPERATURE INDICATION Over-Temperature: Charge If during charging, Temperature( ) reaches the threshold of OT Chg for a period of OT Chg Time and AverageCurrent( ) > Chg Current Threshold, then the [OTC] bit of Flags( ) is set.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com SLEEP Mode SLEEP mode is entered automatically if the feature is enabled (Operation Configuration [SLEEP]) = 1) and AverageCurrent( ) is below the programmable level Sleep Current. Once entry into SLEEP mode has been qualified, but prior to entering it, the bq27510-G2performs an ADC autocalibration to minimize offset. During SLEEP mode, the bq27510-G2 periodically takes data measurements and updates its data set.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 POR Exit From HIBERNATE Battery Removed BAT INSERT CHECK Exit From HIBERNATE Communication Activity AND Comm address is for bq27510 Check for battery insertion from HALT state.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com POWER CONTROL Reset Functions When the bq27510-G2 detects a software reset ([RESET] bit of Control( ) initiated), it determines the type of reset and increments the corresponding counter. This information is accessible by issuing the command Control( ) function with the RESET_DATA subcommand. As shown in Figure 4 if a partial reset was detected, a RAM checksum is generated and compared against the previously stored checksum.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 Table 12. IWAKE Threshold Settings (1) (1) RSNS1 RSNS0 IWAKE Vth(SRP-SRN) 0 0 0 Disabled 0 0 1 Disabled 0 1 0 +1. 25 mV or –1.25 mV 0 1 1 +2.5 mV or –2.5 mV 1 0 0 +2.5 mV or –2.5 mV 1 0 1 +5 mV or –5 mV 1 1 0 +5 mV or –5 mV 1 1 1 +10 mV or –10 mV The actual resistance value versus the setting of the sense resistor is not important; just the actual voltage threshold when calculating the configuration.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.com Activities Upon Pack Insertion First OCV and Impedance Measurement At power-up the BAT_LOW/BAT_GD pin is inactive, so that the system cannot obtain power from the battery (this depends on actual implementation). In this state, the battery is put in an open-circuit condition. Next, the bq27510-G2 measures its first open-circuit voltage (OCV) via the BAT pin. From the OCV(SOC) table, the SOC of the inserted battery is found.
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bq27510-G2 www.ti.com SLUS948 – AUGUST 2010 COMMUNICATIONS I2C INTERFACE The fuel gauge supports the standard I2C read, incremental read, one-byte write quick read, and 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 device address is therefore 0xaa or 0xab for write or read, respectively.
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bq27510-G2 SLUS948 – AUGUST 2010 www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 20-Mar-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant BQ27510DRZR-G2 SON DRZ 12 3000 330.0 12.4 2.8 4.3 1.2 4.0 12.0 Q2 BQ27510DRZT-G2 SON DRZ 12 250 180.0 12.4 2.8 4.3 1.2 4.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 20-Mar-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ27510DRZR-G2 SON DRZ 12 3000 338.1 338.1 20.6 BQ27510DRZT-G2 SON DRZ 12 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.