Analog Devices / Maxim Integrated MAX17435 SMBus充电器
Maxim IC MAX17435 高频 SMBus充电器使精确高效的充电器结构变得更为简单。Maxim IC MAX17435可为2、3或4个串联锂电池提供高达7A的充电电流。MAX17435 SMBus充电器可通过SMBus界面对充电设置进行编程，不需要外部组件并提高设计灵活性。充电电流和输入限流感应放大器有较小的偏移误差，并可使用10mΩ的感应电阻。这些Maxim IC SMBus充电器IC可在850kHz频率运行并具有数字输出，数字输出指示出是否有适配器、指示适配器或电池电流的模拟输出和指示适配器电流超过用户规定阈值时的数字输出。MAX17435是笔记本电脑、PDA、移动通信设备和两至四个锂电池供电的设备应用的理想之选。
特性
- Low-Cost SMBus Charger
- High Switching Frequency (0.85MHz)
- Internal Boost Switches
- SMBus-Programmable Charge Voltage, Input Current Limit, Charge Current, Relearn Voltage, and Digital IINP Readback
- Single-Point Compensation
- Automatic Selection of System Power Source
- Adapter n-Channel MOSFETs Driven by an Internal Dedicated Charge Pump
- Adapter Soft-Start
- 0.4% Accurate Charge Voltage
- ±2.5% Accurate Input Current Limiting
- ±3% Accurate Charge Current
- Monitor Outputs for
- AC Adapter Current (±2% Accuracy)
- Battery Discharge Current (±2% Accuracy)
- AC Adapter Presence
- AC Adapter Overvoltage Protection
- 11-Bit Battery Voltage Setting
- 6-Bit, Charge-Current Setting/Input Current Setting
- Improved IINP Accuracy at Low Input Current
应用
- 2 to 4 Li+ Cell Battery-Powered Devices
- Notebook Computers
- PDAs and Mobile Communicators
Application Circuit
发布日期: 2011-02-23
| 更新日期: 2023-04-21