数据搜索系统,热门电子元器件搜索
  Chinese▼

Delete All
ON OFF


BQ27743 Datasheet(数据表) 16 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
Scroll/Zoom Zoom In 100% Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 

 16 page
background image
16
bq27743
SLUSCM0A – JUNE 2017 – REVISED SEPTEMBER 2018
www.ti.com
Product Folder Links: bq27743
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
8.3 Feature Description
8.3.1 Configuration
Cell information is stored in the fuel gauge in non-volatile flash memory. Many of these data flash locations are
accessible during application development. They cannot, generally, be accessed directly during end-equipment
operation. Access to these locations is achieved by either use of the companion evaluation software, through
individual commands, or through a sequence of data-flash-access commands. To access a desired data flash
location, the correct data flash subclass and offset must be known.
The fuel gauge provides 64 bytes of user-programmable data flash memory, partitioned into two 32-byte blocks:
Manufacturer Info Block A and Manufacturer Info Block B. This data space is accessed through a data flash
interface.
8.3.2 Fuel Gauging
The key to the high-accuracy gas gauging prediction is Texas Instruments proprietary Impedance Track™
algorithm. This algorithm uses cell measurements, characteristics, and properties to create state-of-charge
predictions that can achieve less than 1% error across a wide variety of operating conditions and over the
lifetime of the battery.
See Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm Application Note
(SLUA364) for further details.
8.3.3 Power Modes
To minimize power consumption, the fuel gauge has different power modes: NORMAL, SLEEP, and
FULLSLEEP. 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.
8.3.3.1 NORMAL Mode
The fuel gauge is in NORMAL mode when not in any other power mode. During this mode, AverageCurrent(),
Voltage(), and Temperature() measurements are taken, and the interface data set is updated. Decisions to
change states are also made. This mode is exited by activating a different power mode.
Because the fuel gauge consumes the most power in NORMAL mode, the Impedance Track™ algorithm
minimizes the time the fuel gauge remains in this mode.
8.3.3.2 SLEEP Mode
SLEEP mode performs AverageCurrent(), Voltage(), and Temperature() less frequently which results in reduced
power consumption. SLEEP mode is entered automatically if the feature is enabled (Pack 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 fuel gauge performs an ADC autocalibration to minimize
offset.
During the SLEEP mode, the fuel gauge periodically takes data measurements and updates its data set.
However, a majority of its time is spent in an idle condition.
The fuel gauge exits SLEEP if any entry condition is broken, specifically when either:
AverageCurrent() rises above Sleep Current or
A current in excess of IWAKE through RSENSE is detected.




HTML 页

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42 


数据表 下载




链接网址

ALLDATASHEET是否为您带来帮助?  [ DONATE ]  

关于 Alldatasheet    |   广告服务   |   联系我们   |   隐私政策   |   书签   |   链接交换   |   制造商名单
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl