封装信息
| 封装 | 引脚 VQFN (RGY) | 24 |
| 工作温度范围 (°C) -40 to 85 |
| 包装数量 | 包装 3,000 | LARGE T&R |
BQ24133 的特性
- 集成了 2.5A N-MOSFET 的 1.6MHz 同步开关模式充电器
- 效率高达 92%
- 30V 额定输入电压，具有可调节过压保护功能
- 4.5V 至 17V 输入工作电压
- 电池充电电压
- 1 节、2 节或 3 节电池均达到 4.2V
- 高度集成
- 适配器和电池之间的自动电源路径选择器
- 动态电源管理
- 集成式 20V 开关 MOSFET
- 集成式自举二极管
- 内部数字软启动
- 安全
- 热调节环路节流阀反向电流可将 T J 限制为 120°C
- 热关断保护
- 电池热敏电阻可检测高温/低温充电暂停和进行电池检测
- 可调节输入过压保护
- 逐周期电流限制
- 精度
- ±0.5% 充电电压调节
- ±5% 充电电流调节
- ±6% 输入电流调节
- 移除适配器后的电池电流低于 15µA
- 在使用适配器且禁用充电的封装中，输入电流小于 1.5mA
BQ24133 的说明
BQ24133 器件是一款高度集成的独立型锂离子及锂聚合物开关模式电池充电器，集成了两个 N 沟道功率 MOSFET。该器件提供一个恒定频率同步 PWM 控制器，可对输入电流、充电电流和电压进行高精度调节。BQ24133 可严密监测电池包温度，仅允许在预设的温度范围内充电。BQ24133 可为一节、两节或三节电池（由 CELL 引脚选择）充电，充电至每节电池具有 4.2V 固定电压。
The BQ24133 charges the battery in three phases: preconditioning, constant current, and constant voltage.
The BQ24133 provides power path selector gate driver ACDRV/CMSRC on input NMOS pair ACFET (Q1) and RBFET (Q2), and BATDRV on a battery PMOS device (Q3). When the qualified adapter is present, the system is directly connected to the adapter. Otherwise, the system is connected to the battery. In addition, the power path prevents battery from boosting back to the input.
The BQ24133 charges the battery from a DC source as high as 17 V, including a car battery. The input overvoltage limit is adjustable through the OVPSET pin. The AVCC, ACP, and ACN pins have a 30-V rating. When a high-voltage DC source is inserted, Q1 and Q2 remain off to avoid high-voltage damage to the system.
For 1-cell applications where the battery is not removable, the system can be directly connected to the battery to simplify the power path design and reduce the cost. With this configuration, the battery can automatically supplement the system load if the adapter is overloaded.
The BQ24133 is available in a 24-pin, 5.5-mm × 3.5-mm thin VQFN package.