BQ2054 - 锂离子电池开关模式充电管理 IC

BQ2054是TI德州仪器公司的一款电池充电器IC产品，BQ2054是锂离子电池开关模式充电管理 IC，本站介绍了BQ2054的封装应用图解、特点和优点、功能等，并给出了与BQ2054相关的TI元器件型号供参考。

BQ2054 - 锂离子电池开关模式充电管理 IC - 电池充电器IC - 电池管理产品 - 德州仪器

产品描述

The bq2054 Lithium Ion Fast-Charge IC is designed to optimize charging of lithium ion (Li-Ion) chemistry batteries. A flexible pulse-width modulation regulator allows the bq2054 to control voltage and current during charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum.

The bq2054 measures battery temperature using an external thermistor for charge qualification. Charging begins when power is applied or on battery insertion.

For safety, the bq2054 inhibits charging until the battery voltage and temperature are within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2054 provides low-current conditioning of the battery.

A constant current-charging phase replenishes up to 70% of the charge capacity, and a voltage-regulated phase returns the battery to full. The charge cycle terminates when the charging current falls below a user-selectable current limit. For safety, charging terminates after maximum time and is suspended if the temperature is out-side the preconfigured limits.

The bq2054 provides status indications of all charger states and faults for accurate determination of the battery and charge system conditions.

产品特性

Safe charge of Lithium Ion battery packs
Voltage-regulated current-limited charging
Fast charge terminated by selectable minimum current; safety backup termination on maximum time
Charging continuously qualified by temperature and voltage limits
Pulse-width modulation control ideal for high-efficiency switch-mode power conversion
Direct LED control outputs display charge status and fault conditions

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