BQ24300
- Provides Protection for Three Variables:
- Input Overvoltage
- Input Overcurrent with Current Limiting
- Battery Overvoltage
- 30V Maximum Input Voltage
- Optional Input Reverse Polarity Protection
- High Immunity Against False Triggering Due to Voltage Spikes
- Robust Against False Triggering Due to Current Transients
- Thermal Shutdown
- Enable Function
- Small 2 mm × 2 mm 8-Pin SON Package
- LDO Mode Voltage Regulation Options:
- 5.5V on bq24300
- 4.5V on bq24304
- 5.0V on bq24305
- APPLICATIONS
- Bluetooth Headsets
- Low-Power Handheld Devices
The bq24300 and bq24304 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The device operates like a linear regulator: for voltages up to the Input Overvoltage threshold, the output is held at 5.5V (bq24300), 5.0V (bq24305) or 4.5V (bq24304). In case of an input overvoltage condition, if the overvoltage condition persists for more than a few microseconds, the IC removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the current to a safe value for a blanking duration before turning the switch off. Additionally, the IC also monitors its own die temperature and switches off if it becomes too hot.
The IC also offers optional protection against reverse voltage at the input with an external P-channel MOSFET.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection IC データシート (Rev. C) | 2009/12/04 | |||
| アナログ デザイン ジャーナル | Battery-charger front-end IC improves charging-system safety | 2008/05/16 | ||||
| アプリケーション・ノート | How to Meet 24V Hot Plug-In Test for Charge Front-End bq243xx | 2008/01/02 | ||||
| アプリケーション・ノート | High Voltage Pulse Transient Safety Design fro bq243xx | 2007/12/04 |
設計と開発
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TIDA-00034 — 過電圧保護/過電流保護 IC およびリチウムイオン・チャージャ・フロント・エンド保護 IC のリファレンス・デザイン
This reference design, using bq24300 and bq24304, is a highly integrated design that provides protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The design operates like a linear (...)
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| WSON (DSG) | 8 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。