 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
BQ34Z100 Datasheet(PDF) 9 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
BQ34Z100 Datasheet(HTML) 9 Page - Texas Instruments |
|
|
9 / 50 page  bq34z100 www.ti.com SLUSAU1 – MAY 2012 GENERAL DESCRIPTION The bq34z100 accurately predicts the battery capacity and other operational characteristics of a single cell or multiple rechargeable cells blocks, which are voltage balanced when resting. It supports various Li-Ion and LiFePO4 chemistries. It can be interrogated by a host processor to provide cell information, such as Remaining Capacity, Full Charge Capacity, and Average Current. Information is accessed through a series of commands, called Standard Commands. Further capabilities are provided by the additional Extended Commands set. Both sets of commands, indicated by the general format Command(), are used to read and write information contained within the bq34z100 device’s control and status registers, as well as its data flash locations. Commands are sent from host to gauge using the bq34z100 serial communications engines, HDQ, and I2C, and can be executed during application development, pack manufacture, or end-equipment operation. Cell information is stored in the bq34z100 in non-volatile flash memory. Many of these data flash locations are accessible during application development and pack manufacture. They cannot, generally, be accessed directly during end-equipment operation. Access to these locations is achieved by either use of the bq34z100’s 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 bq34z100 provides 32 bytes of user-programmable data flash memory. This data space is accessed through a data flash interface. For specifics on accessing the data flash, refer to DATA FLASH INTERFACE. The key to the bq34z100 device’s high-accuracy gas gauging prediction is Texas Instrument’s proprietary Impedance Track algorithm. This algorithm uses voltage measurements, characteristics, and properties to create state-of-charge predictions that can achieve accuracy with as little as 1% error across a wide variety of operating conditions. The bq34z100 measures charge/discharge activity by monitoring the voltage across a small-value series sense resistor connected in the low side of the battery circuit. When an application’s load is applied, cell impedance is measured by comparing its Open Circuit Voltage (OCV) with its measured voltage under loading conditions. The bq34z100 can use an NTC thermistor (default is Semitec 103AT or Mitsubishi BN35-3H103FB-50) for temperature measurement, or can also be configured to use its internal temperature sensor. The bq34z100 uses temperature to monitor the battery-pack environment, which is used for fuel gauging and cell protection functionality. To minimize power consumption, the bq34z100 has three power modes: NORMAL, SLEEP, and FULL SLEEP. The bq34z100 passes automatically between these modes, depending upon the occurrence of specific events. Multiple modes are available for configuring from one to 16 LEDs as an indicator of remaining state of charge. More than four LEDs require the use of one or two inexpensive SN74HC164 shift register expanders. A SHA-1/HMAC-based battery pack authentication feature is also implemented on the bq34z100. When the IC is in UNSEALED mode, authentication keys can be (re)assigned. Alternatively, keys can also be programmed permanently in secure memory by Texas Instruments. A scratch pad area is used to receive challenge information from a host and to export SHA-1/HMAC encrypted responses. See the AUTHENTICATION section for further details. NOTE Formatting conventions in this document: Commands: italics with parentheses and no breaking spaces, e.g. RemainingCapacity(). Data Flash: italics, bold, and breaking spaces, e.g. Design Capacity. Register Bits and Flags: brackets only, e.g. [TDA] Data Flash Bits: italic and bold, e.g. [LED1] Modes and states: ALL CAPITALS, e.g. UNSEALED mode. Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): bq34z100 |
Similar Part No. - BQ34Z100 |
|
Similar Description - BQ34Z100 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
