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SCL

SRN

VSYS

Coulomb

Bus

SDA

Counter

GPOUT

BIN

CPU

ADC

SRP

PACKP

Li -Ion

Cell

LDO

VDD

VSS

PACKN

Protection

NFET

1.8 V

BAT

Battery Pack

0 47 µF

1 µF

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bq27441-G1

SLUSBH1C –NOVEMBER 2013–REVISED DECEMBER 2014

bq27441-G1 System-Side Impedance Track™ Fuel Gauge

1 Features 2 Applications

• Single Series Cell Li-Ion Battery Fuel Gauge

• Smartphones, Feature Phones, and Tablets

• Digital Still and Video Cameras

– Resides on System Board

• Handheld Terminals

– Supports Embedded or Removable Batteries

• MP3 or Multimedia Players

– Powered Directly from Battery with Integrated

LDO

3 Description

– Supports a Low-Value External Sense Resistor

The Texas Instruments bq27441-G1 fuel gauge is a

(10 mΩ)

microcontroller peripheral that provides system-side

• Battery Fuel Gauging Based on Patented

fuel gauging for single-cell Li-Ion batteries. The

Impedance Track™ Technology

device requires minimal user configuration and

– Reports Remaining Capacity and State-of-

system microcontroller firmware development.

Charge (SOC) with Smoothing Filter

The bq27441-G1 battery fuel gauge uses the

– Automatically Adjusts for Battery Aging, Self-

patented Impedance Track™ algorithm for fuel

discharge, Temperature, and Rate Changes

gauging, and provides information such as remaining

battery capacity (mAh), state-of-charge (%), and

– Battery State-of-Health (Aging) Estimation

battery voltage (mV).

• Microcontroller Peripheral Supports:

Battery fuel gauging with the bq27441-G1 fuel gauge

– 400-kHz I

C Serial Interface

requires connections only to PACK+ (P+) and PACK–

– Configurable SOC Interrupt or

(P–) for a removable battery pack or embedded

Battery Low Digital Output Warning

battery circuit. The tiny, 12-pin, 2.50 mm × 4.00 mm,

– Internal Temperature Sensor or

small outline no-lead (SON) package is ideal for

Host-Reported Temperature

space-constrained applications.

Device Information

(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

bq27441-G1 VSON (12) 2.50 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Simplified Schematic

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Summary of content (28 pages)

PAGE 1
Product Folder Sample & Buy Support & Community Tools & Software Technical Documents bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 bq27441-G1 System-Side Impedance Track™ Fuel Gauge 1 Features 2 Applications • • • • • 1 • • Single Series Cell Li-Ion Battery Fuel Gauge – Resides on System Board – Supports Embedded or Removable Batteries – Powered Directly from Battery with Integrated LDO – Supports a Low-Value External Sense Resistor (10 mΩ) Battery Fuel Gauging Based on Patented I
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Simplified Schematic............................................. Revision History..................................................... Device Comparison Table......................
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 Changes from Original (November 2013) to Revision A • Page Changed the device status from Product Preview to Production Data .................................................................................. 1 6 Device Comparison Table PART NUMBER BATTERY TYPE bq27441DRZR-G1A LiCoO2 (4.2 V maximum charge) 0x0128 LiCoO2 (4.3 to 4.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com 7 Pin Configuration and Functions GPOUT BIN Pin Functions PIN NAME BAT NUMBER 6 BIN 10 GPOUT 12 TYPE (1) DESCRIPTION PI, AI LDO regulator input and battery voltage measurement input. Kelvin sense connect to positive battery terminal (PACKP). Connect a capacitor (1 µF) between BAT and VSS. Place the capacitor close to the gauge. DI Battery insertion detection input.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 8 Specifications 8.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) VBAT VSR MIN MAX UNIT BAT pin input voltage range –0.3 6 V SRP and SRN pins input voltage range –0.3 VBAT + 0.3 V 2 V 2 V V Differential voltage across SRP and SRN. ABS(SRP – SRN) VDD VDD pin supply voltage range (LDO output) –0.3 VIOD Open-drain IO pins (SDA, SCL) –0.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 8.5 www.ti.com Supply Current TA = 30°C and VREGIN = VBAT = 3.6V (unless otherwise noted) PARAMETER ICC (1) TEST CONDITIONS MAX UNIT μA 21 μA 9 μA 0.6 μA ILOAD > Sleep Current SLEEP mode current ILOAD < Sleep Current (2) IHIB (1) HIBERNATE mode current ILOAD < Hibernate Current (2) SHUTDOWN mode current Fuel gauge in host commanded SHUTDOWN mode.
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bq27441-G1 www.ti.com 8.7 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 LDO Regulator, Wake-up, and Auto-Shutdown DC Characteristics TA = –40°C to 85°C, typical values at TA = 30°C and VREGIN = 3.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com I2C-Compatible Interface Communication Timing Characteristics 8.11 TA = –40°C to 85°C; typical values at TA = 30°C and VREGIN = 3.6 V (unless otherwise noted) (Force Note1) (1) MIN TYP MAX UNIT Standard Mode (100 kHz) 4 μs 4.7 μs 4 μs 4.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 8.12 SHUTDOWN and WAKE-UP Timing tPUCD tSHUP tVDD tSHDN tPUCD tWUVDD REGIN VDD I2C Bus GPOUT SHUTDOWN_ ENABLE SHUTDOWN * State Off WAKE-UP Active SHUTDOWN WAKE-UP Active * GPOUT is configured as an input for wake-up signaling. Figure 2. SHUTDOWN and WAKE-UP Timing Diagram 8.13 Typical Characteristics 0.14 10 0.12 5 Temperature Accuracy Error(%) Voltage Accuracy Error (%) 0.1 0.08 0.06 0 -5 -10 0.04 0.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com 9 Detailed Description 9.1 Overview The fuel gauge 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-ofcharge (SoC). NOTE The following formatting conventions are used in this document: Commands: italics with parentheses() and no breaking spaces, for example, Control().
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 9.4 Device Functional Modes To minimize power consumption, the fuel gauge has several power modes: INITIALIZATION, NORMAL, SLEEP, and HIBERNATE. The fuel gauge passes automatically between these modes, depending upon the occurrence of specific events, though a system processor can initiate some of these modes directly. More details are found in the bq27441-G1 Technical Reference Manual (SLUUAC9). 9.5 Programming 9.5.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 9.5.2 www.ti.com Control(): 0x00 and 0x01 Issuing a Control() command requires a subsequent 2-byte subcommand. These additional bytes specify the particular control function desired. The Control() command allows the system to control specific features of the fuel gauge during normal operation and additional features when the device is in different access modes, as described in Table 2.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 9.5.4 Communications 9.5.4.1 I2C Interface The fuel gauge supports the standard I2C read, incremental read, quick read, one-byte write, and 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 first 8 bits of the I2C protocol are, therefore, 0xAA or 0xAB for write or read, respectively.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com 9.5.4.3 I2C Command Waiting Time To ensure proper operation at 400 kHz, a t(BUF) ≥ 66 μs bus-free waiting time must be inserted between all packets addressed to the fuel gauge. In addition, if the SCL clock frequency (fSCL) is > 100 kHz, use individual 1byte write commands for proper data flow control. The following diagram shows the standard waiting time required between issuing the control subcommand the reading the status result.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 10 Application and Implementation NOTE Information in the following application section is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com Typical Applications (continued) 10.2.2 Detailed Design Procedure 10.2.2.1 BAT Voltage Sense Input A ceramic capacitor at the input to the BAT pin is used to bypass AC voltage ripple to ground, greatly reducing its influence on battery voltage measurements.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 Typical Applications (continued) 10.2.3 Application Curves 0.14 10 0.12 5 Temperature Accuracy Error(%) Voltage Accuracy Error (%) 0.1 0.08 0.06 0 -5 -10 0.04 0.02 -40 -20 0 20 40 Temperature (°C) 60 80 100 -15 -40 -20 Figure 7. Voltage Accuracy 0 20 40 Temperature (°C) 60 80 100 Figure 8. Temperature Accuracy 0 -0.1 Current Accuracy Error (%) -0.2 -0.3 -0.4 -0.5 -0.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com 11 Power Supply Recommendation 11.1 Power Supply Decoupling The battery connection on the BAT pin is used for two purposes: • To supply power to the fuel gauge • To provide an input for voltage measurement of the battery. A capacitor of value of at least 1 µF should be connected between BAT and VSS. The capacitor should be placed close to the gauge IC and have short traces to both the BAT pin and VSS.
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bq27441-G1 www.ti.com SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 12.2 Layout Example Vpullup (do not pull to gauge VDD) VDD (should be pulled up to gauge VDD) RBIN RSCL RSDA GPOUT SDA SDA GPOUT There is an internal pull down on GPOUT SCL SCL NC VSS BIN NC NC VDD SRP BAT SRN If battery pack thermistor will not be connected to BIN pin, a 10-k pulldown resistor should be connected to the BIN pin. The BIN pin should not be shorted directly to VDD or VSS.
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bq27441-G1 SLUSBH1C – NOVEMBER 2013 – REVISED DECEMBER 2014 www.ti.com 13 Device and Documentation Support 13.1 Documentation Support 13.1.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 19-Dec-2014 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 3-Feb-2015 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 BQ27441DRZR-G1A SON DRZ 12 3000 330.0 12.4 2.8 4.3 1.2 4.0 12.0 Q2 BQ27441DRZR-G1B SON DRZ 12 3000 330.0 12.4 2.8 4.3 1.2 4.0 12.0 Q2 BQ27441DRZT-G1A 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 3-Feb-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ27441DRZR-G1A SON DRZ 12 3000 367.0 367.0 35.0 BQ27441DRZR-G1B SON DRZ 12 3000 367.0 367.0 35.0 BQ27441DRZT-G1A SON DRZ 12 250 210.0 185.0 35.0 BQ27441DRZT-G1B 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.