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BQ27743 Datasheet(数据表) 2 Page - Texas Instruments

部件型号  BQ27743
说明  Single-Cell Li-Ion Battery Fuel Gauge with Programmable Hardware Protection
下载  42 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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 2 page
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2
bq27743
SLUSCM0A – JUNE 2017 – REVISED SEPTEMBER 2018
www.ti.com
Product Folder Links: bq27743
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
Table of Contents
1
Features .................................................................. 1
2
Applications ........................................................... 1
3
Description ............................................................. 1
4
Revision History..................................................... 2
5
Description (Cont.)................................................. 2
6
Pin Configuration and Functions ......................... 3
7
Specifications......................................................... 5
7.1
Absolute Maximum Ratings ...................................... 5
7.2
ESD Ratings.............................................................. 6
7.3
Recommended Operating Conditions ....................... 6
7.4
Thermal Information .................................................. 6
7.5
Power-On Reset........................................................ 7
7.6
2.5-V LDO Regulator .............................................. 7
7.7
Charger Attachment and Removal Detection ........... 7
7.8
CHG and DSG FET Drive ......................................... 7
7.9
Overvoltage Protection (OVP) .................................. 8
7.10
Undervoltage Protection (UVP)............................... 8
7.11
Overcurrent in Discharge (OCD)............................. 8
7.12
Overcurrent in Charge (OCC) ................................. 8
7.13
Short-Circuit in Discharge (SCD) ............................ 9
7.14
Low Voltage Charging............................................. 9
7.15
Internal Temperature Sensor Characteristics ......... 9
7.16
High-Frequency Oscillator....................................... 9
7.17
Low-Frequency Oscillator ....................................... 9
7.18
Integrating ADC (Coulomb Counter)
Characteristics ........................................................... 9
7.19
ADC (Temperature and Cell Voltage)
Characteristics ......................................................... 10
7.20
Data Flash Memory Characteristics...................... 10
7.21
Timing Requirements ............................................ 10
7.22
Typical Characteristics .......................................... 13
8
Detailed Description ............................................ 15
8.1
Overview ................................................................. 15
8.2
Functional Block Diagram ....................................... 15
8.3
Feature Description................................................. 16
8.4
Device Functional Modes........................................ 19
8.5
Battery Parameter Measurements .......................... 22
8.6
Communications ..................................................... 23
8.7
Standard Data Commands ..................................... 25
8.8
Extended Data Commands ..................................... 27
9
Application and Implementation ........................ 29
9.1
Application Information............................................ 29
9.2
Typical Applications ................................................ 29
10
Power Supply Recommendation ....................... 36
10.1
Power Supply Decoupling ..................................... 36
11
Layout................................................................... 37
11.1
Layout Guidelines ................................................. 37
11.2
Layout Example .................................................... 38
12
Device and Documentation Support ................. 39
12.1
Documentation Support ........................................ 39
12.2
Receiving Notification of Documentation Updates 39
12.3
Community Resources.......................................... 39
12.4
Trademarks ........................................................... 39
12.5
Electrostatic Discharge Caution ............................ 39
12.6
Glossary ................................................................ 39
13
Mechanical, Packaging, and Orderable
Information ........................................................... 39
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (June 2017) to Revision A
Page
Changed the bq27743 gauge to a catalog device and added the YAH package ................................................................. 1
Changed Thermal Information ............................................................................................................................................... 6
5 Description (Cont.)
The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to
empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters
throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a
variety of important battery conditions to the system.




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