BQ25123 是一款高度集成的电池充电管理 IC,集成了可穿戴设备的常用功能:线性充电器、稳压输出、负载开关、带计时器的手动复位以及电池电压监视器。该集成降压转换器是一款具有低 I Q 的高效率开关,其采用 DCS 控制技术,可进一步提升轻载效率,负载电流可低至 10µA。运行和关断期间的低静态电流有助于延长电池寿命。该器件支持 5mA 至 300mA 的充电电流。输入电流限制、充电电流、降压转换器输出电压、LDO 输出电压等参数均可通过 I 2C 接口进行编程。
| Number of series cells | 1 |
| Charge current (max) (A) | 0.3 |
| Vin (max) (V) | 5.5 |
| Cell chemistry | Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 |
| Battery charge voltage (min) (V) | 3.6 |
| Battery charge voltage (max) (V) | 4.65 |
| Absolute max Vin (max) (V) | 20 |
| Control topology | Linear |
| Control interface | I2C |
| Features | BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Integrated LDO, Integrated buck converter, Power Path |
| Vin (min) (V) | 3.4 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| DSBGA (YFP) | 25 | 6.75999999999999792000000000000016 mm² 2.5999999999999996 x 2.5999999999999996 |