Texas Instruments bq27500 - Manuals

Texas Instruments bq27500 – Manual in PDF format online.

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Manual

Manual Texas Instruments bq27500

Summary

Page 3 - DEVICE INFORMATION; AVAILABLE OPTIONS; TERMINAL FUNCTIONS; System-Side Impedance TrackTM Fuel Gauge

www.ti.com 2 DEVICE INFORMATION 2.1 AVAILABLE OPTIONS 2.2 PIN DIAGRAMS BAT V SS SRN SRP V CC BAT_GD SDA SCL 1 2 3 4 5 6 12 11 10 9 8 7 BAT_LOW _ TS 1 2 3 4 5 6 12 11 10 9 8 7 BI/TOUT BAT V SS V CC BAT_LOW _ TS BI/TOUT NC SRN SRP BAT_GD SDA SCL RID bq27500 bq27501 2.3 TERMINAL FUNCTIONS bq27500bq2750...

Page 4 - ABSOLUTE MAXIMUM RATINGS; C, Typical Values at T

www.ti.com 3 ELECTRICAL SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS 3.2 RECOMMENDED OPERATING CONDITIONS 3.3 POWER-ON RESET bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 over operating free-air temperature range (unless otherwise noted) (1) PARAMETER VALUE UNIT V CC ...

Page 5 - C and V

www.ti.com 3.4 INTERNAL TEMPERATURE SENSOR CHARACTERISTICS 3.5 HIGH FREQUENCY OSCILLATOR 3.6 LOW FREQUENCY OSCILLATOR 3.7 INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS 3.8 ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPT...

Page 7 - C-Compatible Interface Timing Diagrams

www.ti.com bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 Figure 3-1. I 2 C-Compatible Interface Timing Diagrams Submit Documentation Feedback ELECTRICAL SPECIFICATIONS 7

Page 8 - Manufacturer Information Blocks.; NOTE

www.ti.com 4 GENERAL DESCRIPTION bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The bq27500/1 accurately predicts the battery capacity and other operational characteristics of a singleLi-based rechargeable cell. It can be interrogated by a system processor to provide ...

Page 9 - STANDARD DATA COMMANDS; C transmissions must

www.ti.com 4.1 DATA COMMANDS 4.1.1 STANDARD DATA COMMANDS bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The bq27500/1 uses a series of 2-byte standard commands to enable system reading and writing ofbattery information. Each standard command has an associated comman...

Page 10 - Table 4-3. CONTROL STATUS Bit Definitions

www.ti.com bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 4.1.1.1 Control( ): 0x00/0x01 Issuing a Control( ) command requires a subsequent two-byte sub-command. These additional bytesspecify the particular control function desired. The Control( ) command allows the sy...

Page 14 - EXTENDED DATA COMMANDS; . For details on the SEALED and UNSEALED states, see

www.ti.com 4.1.2 EXTENDED DATA COMMANDS bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 4.1.1.16 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 mea...

Page 15 - SEALED Access: This command is not available in SEALED mode.

www.ti.com bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 Table 4-5. Extended Data Commands (continued) COMMAND SEALED UNSEALED NAME UNITS CODE ACCESS (1) (2) ACCESS (1) (2) BlockData( ) DFD 0x55 … 0x5f N/A R R/W BlockDataCheckSum( ) DFDCKS 0x60 N/A R/W R/W BlockData...

Page 16 - DATA FLASH INTERFACE; ACCESSING THE DATA FLASH; for specific bit definitions.

www.ti.com 4.2 DATA FLASH INTERFACE 4.2.1 ACCESSING THE DATA FLASH bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 4.1.2.7 DeviceNameLength( ): 0x62 UNSEALED and SEALED Access: This byte contains the length of the Device Name. 4.1.2.8 DeviceName( ): 0x63 … 0x69 UNSEALE...

Page 17 - MANUFACTURER INFORMATION BLOCKS; x5f for editing or reading by the system.; Security Mode

www.ti.com 4.3 MANUFACTURER INFORMATION BLOCKS 4.4 ACCESS MODES 4.5 SEALING/UNSEALING DATA FLASH bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The bq27350 contains 96 bytes of user programmable data flash storage: Manufacturer Info Block A,Manufacturer Info Block B,...

Page 18 - DATA FLASH SUMMARY

www.ti.com 4.6 DATA FLASH SUMMARY bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 Both the sets of keys for each level are 2 bytes each in length and are stored in data flash. The UNSEALkey (stored at Unseal Key 0 and Unseal Key 1) and the FULL-ACCESS key (stored at Fu...

Page 21 - IMPEDANCE TRACKTM VARIABLES; Current Model Used; If ILoad Mode = 1 (Constant Power) then the following options shown in; Power Model Used

www.ti.com 5.2 IMPEDANCE TRACK™ VARIABLES bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The bq27500/1 has several data flash variables that permit the user to customize the Impedance Track™algorithm for optimized performance. These variables are dependent upon the p...

Page 23 - DETAILED DESCRIPTION OF DEDICATED PINS; The Operation Configuration Register; . This register is programmed/read via the methods desribed in; Table 5-3. Operation Configuration Bit Definition; Operation; Charge Inhibit for additional details.

www.ti.com 5.3 DETAILED DESCRIPTION OF DEDICATED PINS 5.3.1 The Operation Configuration Register 5.3.2 Pin Function Code Descriptions 5.3.3 BAT_LOW Pin 5.3.4 Power Path Control with the BAT_GD Pin bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 Some bq27500/1 pins are...

Page 24 - Battery Detection Using the BI/TOUT Pin; The flowchart of

www.ti.com 5.3.5 Battery Detection Using the BI/TOUT Pin bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 for the fuel gauge to take an accurate OCV reading. To disable these functions, the BAT_GD pin is merelyset high (floating output pulled high). Once an OCV reading ...

Page 26 - Overtemperature: Charge; CHARGING AND CHARGE-TERMINATION INDICATION; Detecting Charge Termination; Standard Data Commands for

www.ti.com 5.4 TEMPERATURE MEASUREMENT 5.5 OVERTEMPERATURE INDICATION 5.5.1 Overtemperature: Charge 5.5.2 Overtemperature: Discharge 5.6 CHARGING AND CHARGE-TERMINATION INDICATION 5.6.1 Detecting Charge Termination 5.6.2 Charge Inhibit bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – ...

Page 27 - The relationship between these modes is shown in; through R

www.ti.com 5.7 POWER MODES 5.7.1 NORMAL MODE 5.7.2 SLEEP MODE 5.7.3 BAT INSERT CHECK MODE bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The bq27500/1 has four power modes: NORMAL, SLEEP, HIBERNATE, and BAT INSERT CHECK. InNORMAL mode, the bq27500/1 is fully powered ...

Page 28 - HIBERNATE MODE; C command to the gauge. I

www.ti.com Exit From SLEEP | AverageCurrent ( ) | > Sleep Current OR Current is Detected above IWAKE Entry To HIBERNATE Host has set Control Status [HIBERNATE] =1 OR VCELL < Hibernate Voltage Fuel gauging and data updated every 1s, I CC = Normal NORMAL Fuel gauging and data updated every 60 se...

Page 29 - RESET FUNCTIONS; As shown in

www.ti.com 5.8 POWER CONTROL 5.8.1 RESET FUNCTIONS Store checksum Active RAM changed ? Generate New checksum value YES NO Generate Active RAM checksum value Do the Checksum Values Match? - Re initialize all RAM NO YES DEVICE RESET Stored checksum NORMAL OPERATION bq27500bq27501 System-Side Impedance...

Page 30 - FLASH UPDATES; Threshold Settings; IWAKE; Flash Update OK Voltage. Flash programming current can

www.ti.com 5.8.2 WAKE-UP COMPARATOR 5.8.3 FLASH UPDATES 5.9 AUTOCALIBRATION bq27500bq27501System-Side Impedance Track™ Fuel Gauge SLUS785 – SEPTEMBER 2007 The wake up comparator is used to indicate a change in cell current while the bq27500/1 is in eitherSLEEP or HIBERNATE modes. Operation Configura...

Page 31 - APPLICATION-SPECIFIC INFORMATION; BATTERY PROFILE STORAGE AND SELECTION; General Profile Description; APPLICATION-SPECIFIC FLOW AND CONTROL; Reading Application Status; Application

www.ti.com 6 APPLICATION-SPECIFIC INFORMATION 6.1 BATTERY PROFILE STORAGE AND SELECTION 6.1.1 General Profile Description 6.1.2 Activities Upon Pack Insertion 6.2 APPLICATION-SPECIFIC FLOW AND CONTROL 6.2.1 Simple Battery (bq27500 Only) bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785 ...

Page 33 - COMMUNICATIONS; C INTERFACE; C Formats

www.ti.com 7 COMMUNICATIONS 7.1 I 2 C INTERFACE (a) 1-byte write (b) quick read (c) 1-byte read (d) incremental read (S = Start, Sr = Repeated Start, A = Acknowledge, N = No Acknowledge, and P = Stop). Fuel Gauge Generated Host generated bq27500bq27501 System-Side Impedance Track™ Fuel Gauge SLUS785...

Page 35 - PACKAGING INFORMATION; PACKAGE OPTION ADDENDUM

PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) BQ27500DRZR ACTIVE SON DRZ 12 3000 TBD Call TI Call TI BQ27500DRZT ACTIVE SON DRZ 12 250 TBD Call TI Call TI (1) The marketing status values are defined as ...

Page 39 - IMPORTANT NOTICE; Products

IMPORTANT NOTICE 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 l...