Texas Instruments bq25898/bq25898D I2C制御充電器IC
Texas Instruments bq25898/bq25898D I2C制御シングルセル充電器ICは、高度に統合されたスイッチモードバッテリ充電管理およびシステムパワーパス管理デバイスで、シングルセルリチウムイオンおよびリチウムポリマーバッテリ用です。 このデバイスは、高入力電圧高速充電に対応しています。 低インピーダンス出力経路により、スイッチモード動作効率を最適化し、電池充電時間を低減することで、放電時の電池寿命を延長します。 充電およびシステム設定によるI2Cシリアルインターフェイスを採用したこのデバイスは、本物の柔軟性を備えたソリューションです。
特徴
- High-efficiency 4A, 1.5MHz switch-mode buck charge
- 92% charge efficiency at 3A and 91% charge efficiency at 4A charge current
- Optimize for high voltage input (9V/12V)
- Low-power PFM mode for light load operations
- USB On-the-Go (OTG) with adjustable output from 4.5V to 5.5V
- Selectable 500KHz / 1.5MHz boost converter with up to 2.4A output
- 93% boost efficiency at 5V at 1A output
- Accurate hiccup mode overcurrent protection
- Single input to support USB input and adjustable high voltage adapters
- Support 3.9V to 14V input voltage range
- Input current limit (100mA to 3.25A with 50mA resolution) to support USB2.0, USB3.0 standard, and high voltage adapters
- Maximum power tracking by input voltage limit up to 14V for a wide range of adapters
- Auto-detect USB SDP, CDP, DCP, and non-standard adapters (bq25898)
- Programmable D+/D- drivers for non-standard adapter handshake
- Remote battery sensing
- Input Current Optimizer (ICO) to maximize input power without overloading adapters
- Resistance compensation (IRCOMP) from charger output to cell terminal
- Highest battery discharge efficiency with 5mΩ battery discharge MOSFET up to 9A
- Integrated ADC for system monitor (voltage, temperature, charge current)
- Narrow VDC (NVDC) power path management
- Instant-on works with no battery or deeply discharged battery
- Ideal diode operation in battery supplement mode
- BATFET control to support ship mode, wake up, and full system reset
- Flexible autonomous and I2C mode for optimal system performance
- High integration includes all MOSFETs, current sensing, and loop compensation
- 12µA low battery leakage current to support ship mode
- High accuracy
- ±0.5% charge voltage regulation
- ±5% charge current regulation
- ±7.5% input current regulation
- Safety
- Battery temperature sensing for charge and boost mode
- Thermal regulation and thermal shutdown
- Available in 2.8mm×2.5mm 42-ball DSBGA package
アプリケーション
- Smartphone
- Tablet PC
- Portable internet devices
Simplified Schematic
Evaluation Module
Texas Instruments bq25898EVM/bq25898DEVM評価モジュール（EVM）
bq25898またはbq25989D、スイッチモードバッテリ充電デバイスの評価を目的とした完全な充電器モジュールです。
公開: 2016-05-23
| 更新済み: 2022-03-11