BQ2954PN 供应商
BQ2954PN 属性参数
- 标准包装：25
- 类别：集成电路 (IC)
- 家庭：PMIC - 电池管理
- 系列：-
- 功能：充电管理
- 电池化学：锂离子（Li-Ion）
- 电源电压：4.5 V ~ 5.5 V
- 工作温度：-40°C ~ 85°C
- 安装类型：通孔
- 封装/外壳：16-DIP（0.300"，7.62mm）
- 供应商设备封装：16-PDIP
- 包装：管件
- 配用：296-9505-ND - EVAL MOD FOR BQ2954 LI-ION LO-SD296-9504-ND - EVAL MOD FOR BQ2954
- 其它名称：296-9387-5
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
产品概述
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.
BQ2954PN