BQ24055是TI公司的一款电池充电器IC产品，BQ24055是具有自动 AC/USB 检测功能和 PG 的 1A 单输入单节锂离子电池充电器，本页介绍了BQ24055的产品说明、应用、特性等，并给出了与BQ24055相关的TI元器件型号供参考。
BQ24055 - 具有自动 AC/USB 检测功能和 PG 的 1A 单输入单节锂离子电池充电器 - 电池充电器IC - 电池管理产品 - TI公司（Texas Instruments，德州仪器）
- Charging
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
- Pin Selectable USB 100-mA and 500-mA Maximum Input Current Limit
- Programmable Termination and Precharge Threshold
- Protection
- 30-V Input Rating; With 6.6-V Input Overvoltage Protection
- Input Voltage Dynamic Power Management
- 125 °C Thermal Regulation; 150°C Thermal Shutdown Protection
- OUT Short-Circuit Protection and ISET Short Detection
- Operation Over JEITA Range Through Battery NTC - ½ Fast-Charge-Current at Cold, 4.06 V at Hot
- Fixed 10-Hour Safety Timer
- System
- Auto Input Source Detection (D+, D– Pins)
- No Device Transceiver Required
- USB Friendly
- Automatic Termination and Timer Disable Mode (TTDM) for Absent Battery Pack With Thermistor
- Status Indication – Charging/Done
- Available in Small 2-mm × 2-mm or 2-mm × 3-mm Package
- Auto Input Source Detection (D+, D– Pins)
- Smart Phones
- PDAs
- MP3 Players
- Low-Power Handheld Devices
The bq2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The bq2405x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| bq24050 | WSON (10) | 2.00 mm × 2.00 mm |
| bq24052 | ||
| bq24055 | WSON (12) | 2.00 mm × 3.00 mm |
