| Number of series cells | 1 |
| Charge current (Max) (A) | 3 |
| Operating Vin (Max) (V) | 17 |
| Cell chemistry | Li-Ion/Li-Polymer |
| Battery charge voltage (Min) (V) | 4.1 |
| Battery charge voltage (Max) (V) | 4.4 |
| Absolute Vin (safety rating) (Max) ((V)) | 28 |
| Control interface | Standalone (RC-Settable) |
| Features | BAT temp thermistor monitoring (hot/cold profile) |
| Operating Vin (Min) (V) | 4 |
| Rating | Catalog |
- 獨立充電器且易于配置
- 高效 1.2MHz 同步開關模式降壓充電器
- 1 節電池 5V 輸入、2A 電流時的充電效率為 92.5%
- 1 節電池 9V 輸入、2A 電流時的充電效率為 91.8%
- 單個輸入，支持 USB 輸入和高電壓適配器
- 支持 4.1V 至 17V 輸入電壓范圍，絕對最大輸入電壓額定值為 28V
- 輸入電壓動態電源管理 (VINDPM) 跟蹤電池電壓
- 高度集成
- 集成反向阻斷和同步開關 MOSFET
- 內部輸入和充電電流感應
- 內部環路補償
- 集成式自舉二極管
- 3.6V/4.05V/4.15V/4.2V 充電電壓
- 3.0A 最大快速充電電流
- 4.5V VBAT 下的 200nA 低電池泄漏電流
- IC 禁用模式下的 4.25μA VBUS 電源電流
- 120°C 時充電電流熱調節
- 預充電電流：快速充電電流的 10%
- 終止電流：快速充電電流的 10%
- 充電精度
- 充電電壓調節范圍為 ±0.5%
- 充電電流調節范圍為 ±10%
- 安全
- 熱調節和熱關斷
- 輸入欠壓鎖定 (UVLO) 和過壓保護 (OVP)
- 電池過充保護
- 預充電和快速充電安全計時器
- 如果電流設置引腳 ICHG 開路或短路，則充電被禁用
- 冷/熱電池溫度保護
- 關于 STAT 引腳的故障報告
- 采用 WQFN 3x3-16 封裝
BQ25300 是一款高度集成的獨立型開關模式電池充電器，適用于 1 節鋰離子和鋰聚合物和磷酸鐵鋰電池。BQ25300 支持 4.1V 至 17V 輸入電壓和 3A 快速充電電流。該器件的集成電流感應拓撲可實現高充電效率和低 BOM 成本。此器件具有出色的 200nA 低靜態電流，可節省電池電量并更大限度地延長便攜式設備的存放時間。BQ25300 采用 3x3 WQFN 封裝，適用于 2 層布局和空間有限的應用。
The BQ25300supports 4.1-V to 17-V input to charge single cell batteries. The BQ25300provides up to 3-A continuous charge current to a single cell 1S battery The device features fast charging for portable devices. Its input voltage regulation delivers maximum charging power to the battery from input source. The solution is highly integrated with an input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), and low-side switching FET (LSFET, Q3).
The BQ25300 features lossless integrated current sensing to reduce power loss and BOM cost with minimized component count. It also integrates a bootstrap diode for the high-side gate drive and battery temperature monitor to simplify system design. The device initiates and completes a charging cycle without host control. The BQ25300 charge voltage and charge current are set by external resistors. The BQ25300detects the charge voltage setting at startup and charges the battery in four phases: battery short, pre-conditioning, constant current, and constant voltage. At the end of the charging cycle, the charger automatically terminates if the charge current is below the termination current threshold and the battery voltage is above the recharge threshold. When the battery voltage falls below the recharge threshold, the charger will automatically start another charging cycle. The charger provides various safety features for battery charging and system operations, including battery temperature monitoring based on negative temperature coefficient (NTC) thermistor, charge safety timer, input over-voltage and over-current protections, as well as battery over-voltage protection. Pin open and short protection is also built in to protect against the charge current setting pin ICHG accidently open or short to GND. The thermal regulation regulates charge current to limit die temperature during high power operation or high ambient temperature conditions.
The STAT pin output reports charging status and fault conditions. When the input voltage is removed, the device automatically enters HiZ mode with very low leakage current from battery to the charger device. The BQ25300 is available in a 3 mm x 3 mm thin WQFN package.
