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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | 1A, Single-Input, Single-Cell LiFePO4, Linear Battery Charger w/ 50mA LDO datasheet | 2011年 7月 5日 | |
| User guide | 1A, Single Cell LiFePO4 Linear Battery Charger with 4.9V, 50mA LDO | 2011年 5月 29日 |
設計與開發
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BQ25070EVM-740 — 適用於 LiFePO4 應用之 BQ25070 1A、單芯、線性充電器的評估模組
This user’s guide describes the bq25070EVM-740 evaluation module (EVM), how to perform a stand-alone evaluation or interface with a host or system. The converter is designed to deliver up to 1 A of continuous current to the battery and/or system. The device has a 4.9 VDC, 50 mA max internal (...)
TIDA-00053 — 適用於磷酸鐵鋰電池應用的 1A、單節電池線性充電器參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DQC) | 10 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。