BQ2954_TI 开关模式锂离子电池充电控制器

BQ2954的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：电池管理 IC - 电池充电器 IC
功能描述：开关模式锂离子电池充电控制器
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BQ2954的产品详情：

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.

BQ2954的优势和特性：

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

BQ2954的参数（英文）：

Number of series cells
1, 2, 3, 4
Charge current (Max) (A)
2
Operating Vin (Max) (V)
5.5
Cell chemistry
Li-Ion/Li-Polymer
Battery charge voltage (Min) (V)
0
Battery charge voltage (Max) (V)
20
Absolute Vin (safety rating) (Max) ((V))
7
Control interface
Standalone (RC-Settable)
Features
BAT temp thermistor monitoring (JEITA profile)
Operating Vin (Min) (V)
4.5
Rating
Catalog

BQ2954具体的完整产品型号参数及价格（美元）：

BQ2954的完整型号有：BQ2954PN、BQ2954SN、BQ2954SNTR，以下是这些产品的关键参数及官网采购报价：

BQ2954PN，工作温度：0 to 70，封装：PDIP (N)-16，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网BQ2954PN的批量USD价格：2.332（1000+）

BQ2954SN，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2954SN的批量USD价格：2.538（1000+）

BQ2954SNTR，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2954SNTR的批量USD价格：2.132（1000+）

BQ2954的评估套件：

BQ2954的电路图解：

BQ2954的评估套件：