BQ2011中文资料适用于高放电率 (>5A)、小电池组容量 (<2Ah) 的镍镉电池电量监测计数据手册TI规格书

描述 Description

The bq2011 Gas Gauge IC is intended for battery-pack installation to maintain an accurate record of available battery charge. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery terminal and ground to determine charge and discharge activity of the battery. The bq2011 is designed for systems such as power tools with very high discharge rates.

Battery self-discharge is estimated based on an internal timer and temperature sensor. Compensations for battery temperature and rate of charge or discharge are applied to the charge, discharge, and selfdischarge calculations to provide available charge information across a wide range of operating conditions. Initial battery capacity is set using the PFC and MODE pins. Actual battery capacity is automatically \"learned\" in the course of a discharge cycle from full to empty and may be displayed depending on the display mode.

Nominal available charge may be directly indicated using a five-segment LED display. These segments are used to indicate graphically the nominal available charge.

The bq2011 supports a simple single-line bidirectional serial link to an external processor (common ground). The bq2011 outputs battery information in response to external commands over the serial link. To support subassembly testing, the outputs may also be controlled by command. The external processor may also overwrite some of the bq2011 gas gauge data registers.

The bq2011 may operate directly from four cells. With the REF output and an external transistor, a simple, inexpensive regulator can be built to provide VCC from a greater number of cells.

Internal registers include available charge, temperature, capacity, battery ID, and battery status.

特性 Features

• Conservative and repeatable measurement of available charge in rechargeable batteries
• Designed for portable equipment such as power tools with high discharge rates
• Designed for battery pack integration
• 120µA typical standby current (self-discharge estimation mode)
• Small size enables implementations in as little as ½ square inch of PCB

• Direct drive of LEDs for capacity display
• Self-discharge compensation using internal temperature sensor
• Simple single-wire serial communications port for subassembly testing
• 16-pin narrow SOIC

简介

BQ2011属于集成电路（IC）的电池管理。由TI制造生产的BQ2011电池管理电池管理 PMIC（电源管理集成电路）系列产品可用于电池相关的监测和控制功能，包括身份验证、电池平衡、状态监测、电量计量、电源选择、短路保护、过压和欠压保护等等。请注意，虽然该系列中的某些产品可能包括电池充电功能，但将充电功能作为主要功能的产品是单独分类的。