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Texas Instruments bq2019 Data Sheet / User Manual

Summary

The bq2019 is an advanced battery-monitoring IC crucial for comprehensive capacity management systems in portable electronics, such as smartphones and PDAs. The device accurately monitors charge/discharge currents using a single-wire HDQ interface with ultra-low power draw. This manual details the integrated technical features, including high-accuracy measurement and nonvolatile memory storage (Flash/ID ROM), making it essential for developers building reliable battery management systems.

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查询BQ2019供应商

SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003

Multifunction Monitoring IC Designed to Multifunction Digital Output Port Work With an Intelligent Host Controller

High-Accuracy Internal Timebase

– Provides State-of-Charge Information for

Eliminates External Crystal Oscillator

Rechargeable Batteries

Low Power Consumption

– Enhances Charge Termination

– Operating: <80 µA

Ideal for Single-Cell Li-Ion or 3-Cell Ni MH

– Sleep: <1.5 µA

Applications

Single-Wire HDQ Serial Interface

High-Accuracy Coulometric Charge and

Packaging: 8-Lead TSSOP

Discharge Current Integration With Offset Calibration

PW PACKAGE 32 Bytes of General-Purpose RAM (TOP VIEW)

96 Bytes of Flash (Including 32 Bytes of

REG STAT

Shadow Flash)

VCC SR

8 Bytes of ID ROM

VSS DC

Internal Temperature Sensor Eliminates the HDQ OSC Need for an External Thermistor

DC – Internal connection only. Do not connect

description The bq2019 advanced battery-monitoring IC accurately measures the charge and discharge currents in a rechargeable battery pack. In pack integration, the bq2019 is the basis of a comprehensive battery-capacity management system in portable applications such as cellular phones, PDAs, or other portable products. The bq2019 works with the host controller in the portable system to implement the battery management system. The host controller interprets the bq2019 data and communicates meaningful battery data to the end-user or power-management system. The bq2019 provides 64 bytes of general-purpose flash memory, 8 bytes of ID ROM, and 32 bytes of flash-backed RAM for data storage. The nonvolatile memory can maintain formatted battery-monitor information, identification codes, warranty information, or other critical battery parameters when the battery is temporarily shorted or deeply discharged.

AVAILABLE OPTIONS

PACKAGED DEVICE

TA MARKING 8-LEAD TSSOP

–20°C to 70°C bq219 bq2019PW

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.

1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Page Summary Contents For Texas Instruments bq2019 Data Sheet / User Manual

Page 1 查询BQ2019供应商 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 Multifunction Monitoring IC Designed to Multifunction Digital Output Port Work With an Intelligent Host Controller High-Accuracy Internal T...
Page 2 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 functional block diagram Bandgap Serial Voltage STAT Interface Reference ID ROM Controller Temperature 3 × 8 RAM Scratch Sensor VFCSR 32 × 8 Shadow Fla...
Page 3 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 detailed description REG (Regulator output) REG is the output of the operational amplifier that drives an external pass N-channel JFET to provide an op...
Page 4 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 electrical characteristics over recommended operating temperature and supply voltage (unless otherwise noted) dc PARAMETER TEST CONDITIONS MIN TYP MAX ...
Page 5 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 VFC characteristics over recommended operating temperature and supply voltage (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Input...
Page 6 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 t(BR) t(HW1) t(HW0) t(CYCH) t(DW1) t(DW0) t(CYCD) Figure 1. HDQ Timing Diagram Break Command Byte (Written by Host to bq26200 Data Byte (Received by Ho...
Page 7 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION Q1† STAT BAT+ 100 Ω 100 Ω D2 REG STAT 5.6 V VCC SR BAT– VSS DC C2 0.02 Ω 0.1 µF 1 W HDQ HDQ OSC PACK– Q1 and C3 are omitted and...
Page 8 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION REG output (continued) charge and discharge count operation Table 1 shows the main counters and registers of the bq2019. The bq...
Page 9 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION REG output (continued) low-power operation The bq2019 begins low-power operation in response to the host issuing the sleep comm...
Page 10 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION REG output (continued) current sense offset calibration The host enables bq2019 current sense offset calibration by one of two ...
Page 11 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register interface (continued) Table 4. bq2019 Registers NAME BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 ADDRESS 0x78–0x7F IDROM 8...
Page 12 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION memory (continued) flash memory In addition to the flash-shadowed RAM, the bq2019 has 64 bytes of flash. The flash can store sp...
Page 13 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION communicating with the bq2019 The bq2019 includes a single-wire HDQ serial data interface. Host processors, configured for eith...
Page 14 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION communicating with the bq2019 (continued) command byte The command byte of the bq2019 consists of eight contiguous valid comman...
Page 15 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION bq2019 registers register maintenance The host system is responsible for register maintenance. To facilitate this maintenance, ...
Page 16 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register descriptions IDROM register The factory programmed 64 bits of ID ROM are located in the eight-byte locations addressed...
Page 17 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register descriptions (continued) flash program address register (FPA) The FPA byte register (address = 0x70) points to the fla...
Page 18 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register descriptions (continued) charge-time count registers (CTCH/CTCL) The CTCH high-byte register (address = 0x66) and the ...
Page 19 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register descriptions (continued) clear register (CLR) The bits in the CLR register (address 0x63) clear the DCR, CCR, SCR, DTC...
Page 20 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 APPLICATION INFORMATION register descriptions (continued) flash command register (FCMD) The FCMD register (address 0x62) is the flash command register ...
Page 21 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 ERRATA Issue : This errata ONLY applies if page 1 (address 0x20– 0x3F) or page 2 (address 0x40– 0x5F) of the embedded flash memory is read through the ...
Page 22 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 Accessing page 1 or Did you read data 0x FF Proceed. No action from a location on page 1 No required. or page 2? Is there an address in the same page w...
Page 23 SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003 MECHANICAL DATA PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,15 NOM Gage Plane Seating Plane 1,20 MAX 0,10 PINS ** DIM A MAX 3,10 5,10...
Page 24 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 servic...

Manual Details

Brand Texas Instruments
Pages 24
File Size 301.38 KB
Published June 20, 2026
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Frequently Asked Questions

What types of batteries is the bq2019 suitable for?

It is ideal for single-cell Li-Ion or 3-Cell NiMH rechargeable batteries.

How does the bq2019 communicate data to a host system?

It uses a Single-Wire HDQ serial communications interface, which sends register information to the host controller.

What capacity is available for nonvolatile data storage?

The device provides 64 bytes of general-purpose flash memory and also utilizes 8 bytes of ID ROM.

What is the power consumption when operating or sleeping?

The operational current is less than 80 μA, and the sleep current draw is less than 1.5 μA.

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