BQ25176K
- Input voltage up to 30V tolerant
- Input Voltage Based Dynamic Power Management (VINDPM)
- Automatic Sleep Mode for low power consumption
- 350nA battery leakage current
- 80µA 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: 4.05V, 4.35V, 4.4V, 4.53V, 4.58V
- LiFePO4: 3.5V, 3.6V, 3.7V
- ISET to set charge current from 10mA to 800mA
- 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 operation control over JEITA range
- Open-drain output for status and fault indication
- Integrated fault protection
- 26V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection
The BQ25176K is an integrated 800mA 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 four phases for charging a Li-Ion/Li-Poly battery: trickle charge to bring the battery voltage up to VBAT_SHORT, 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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25176K: 800mA JEITA-Compliant Linear Battery Charger For 1-Cell Li-Ion and LiFePO4 With VINDPM and 4.5V Battery datasheet | PDF | HTML | 2025年 8月 14日 |
設計與開發
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BQ25176KEVM — BQ25176K 評估模組
BQ25176K 評估模組 (EVM) 包含 BQ25176K IC、LDO TPS7B8133 以及操作評估板所需的支援電路。需要外部 5V 電源為 EVM 供電和為 1 芯電池充電。可使用開關 S1 將充電電壓 VREG 設為 7 個值。充電電流透過從 60mA 至 750mA 的 R22 (ISET) 值設定。會為 JP4 選取固定的 400mA 值。
LDO U2 (TPS7B8133) 提供 3.3V 用於內務處理電壓、為 LED 供電並為 CE 提供電壓。NTC 由 10k 電阻模擬，並可選擇透過微調電位器進行調整。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSG) | 8 | 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。