BQ25070
- Single Cell LiFePO4 Charging Algorithm
- 30V Input Rating, With 10.5V Over-Voltage Protection (OVP)
- 50mA Integrated Low Dropout Linear Regulator (LDO)
- Programmable Charge Current Through Single Input Interface (CTRL)
- 7% Charge Current Regulation Accuracy
- Thermal Regulation and Protection
- Soft-Start Feature to Reduce Inrush Current
- Battery NTC Monitoring
- Charging Status Indication
- Available in Small 2mm × 3mm 10 Pin SON Package
- APPLICATIONS
- Smart Phones
- Mobile Phones
- Portable Media Players
- Low Power Handheld Devices
The bq25070 is a highly integrated LiFePO4 linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell LiFePO4 battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters.
The bq25070 has a single power output that charges the battery and powers the system. The charge current is programmable up to 1A using the CTRL input. Additionally, a 4.9V ±10% 50mA LDO is integrated into the IC for supplying low power external circuitry.
The LiFePO4 charging algorithm removes the constant voltage mode control usually present in Li-Ion battery charge cycles. Instead, the battery is fastcharged to the overcharge voltage and then allowed to relax to a lower float charge voltage threshold. The removal of the constant voltage control reduces charge time significantly. During the charge cycle, 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, and charge status display.
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 | 1A, Single-Input, Single-Cell LiFePO4, Linear Battery Charger w/ 50mA LDO データシート | 2011/07/05 | |||
| ユーザー・ガイド | 1A, Single Cell LiFePO4 Linear Battery Charger with 4.9V, 50mA LDO | 2011/05/29 |
設計と開発
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TIDA-00053 — LiFePO4 アプリケーション用 1 A、シングル・セル、リニア・チャージャのリファレンス・デザイン
This reference design is designed to deliver up to 1 A of continuous current to the battery and/or system. It has a 4.9 VDC, 50 mA max internal LDO that can be used for USB applications or any other need. It uses the bq25070, a highly integrated LiFePO4 linear battery charger, in order to target (...)
| 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 (DQC) | 10 | 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。