BQ2954 - 锂离子开关模式充电管理 IC

BQ2954是TI德州仪器公司的一款电池充电器IC产品，BQ2954是锂离子开关模式充电管理 IC，本站介绍了BQ2954的封装应用图解、特点和优点、功能等，并给出了与BQ2954相关的TI元器件型号供参考。

BQ2954 - 锂离子开关模式充电管理 IC - 电池充电器IC - 电池管理产品 - 德州仪器

产品描述

The bq2954 Li-Ion Charge-Management IC uses a flexible pulse-width modulation regulator to control voltage and current during charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design minimizes power dissipation.

For safety, the bq2954 inhibits fast charging until the battery voltage and temperature are within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2954 provides low-current conditioning of the battery.

For charge qualification, the bq2954 uses an external thermistor to measure battery temperature. Charging begins when power is applied or the battery is inserted

The bq2954 charges a battery in two phases. First a constant-current phase replenishes approximately 70% of battery capacity. Then a voltage- regulation phase completes the battery charge.

The bq2954 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 Li-Ion battery packs
Pulse-width modulation control for current and voltage regulation
Programmable high-side/low-side current-sense
Fast charge terminated by selectable minimum current; safety backup termination at maximum time
Precharge qualification detects shorted or damaged cells and conditions battery
Charging continuously qualified by temperature and voltage limits
Direct LED control outputs to display charge status and fault conditions

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