BQ25170
- Input voltage up-to 30-V tolerant
- Automatic Sleep Mode for low power consumption
- 350-nA battery leakage current
- 85-µA input leakage current when charge disabled
- Supports 1-cell Li-Ion, Li-Poly, and LiFePO4
- External resistor programmable operation
- VSET to set battery regulation voltage:
- Li-Ion: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
- LiFePO4: 3.5 V, 3.6 V, 3.7 V
- ISET to set charge current from 10 mA to 800 mA
- VSET to set battery regulation voltage:
- High accuracy
- ±0.5% charge voltage accuracy
- ±10% charge current accuracy
- Charging features
- Precharge current 20% of ISET
- Termination current 10% of ISET
- NTC thermistor input to monitor battery temperature
- TS pin for charging function control
- Open-drain output for status and fault indication
- Open-drain output for power good indication
- Integrated fault protection
- 6.6-V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000-mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection
The BQ25170 is an integrated 800-mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4 batteries targeted at space-limited portable applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.
The device has three phases for charging a Li-Ion battery: precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity.
In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, TREG, 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 automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25170: 800-mA Linear Battery Charger for 1-Cell Li-Ion, and LiFePO4 datasheet (Rev. A) | PDF | HTML | 2021年 4月 14日 |
| Application note | LiFePO4 Design Considerations | PDF | HTML | 2023年 7月 26日 | |
| Functional safety information | BQ25170 Pin FMA | PDF | HTML | 2022年 5月 24日 | |
| Application note | BQ25171-Q1 Quick Start Guide | PDF | HTML | 2021年 9月 29日 | |
| EVM User's guide | BQ25170EVM Evaluation Module (Rev. A) | 2021年 6月 10日 | ||
| Certificate | BQ25170EVM EU Declaration of Conformity (DoC) | 2020年 8月 13日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
BQ25170EVM — BQ25170 評估模組，適用於單芯鋰離子、鋰聚合物及磷酸鐵鋰的 800-mA 線性電池充電器
| 封裝 | 引腳 | 下載 |
|---|---|---|
| WSON (DSG) | 8 | 檢視選項 |
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
- 資格摘要
- 進行中可靠性監測
- 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。