Analog Devices / Maxim Integrated MAX17435 SMBus充電器
Maxim IC MAX17435 高頻率 SMBus充電器進一步簡化了精確高效充電器的結構。Maxim IC MAX17435可供應高達7A的充電電流給兩個、三個或四個串聯的鋰離子電池。MAX17435 SMBus充電器可透過SMBus介面進行充電設定的編程工作，因而無需外接元件，並有助提高設計靈活性。充電電流與輸入電流限制傳感放大器均具備低偏移誤差，並可使用10mΩ傳感電阻器。這些Maxim IC SMBus充電器IC能於850kHz頻率下操作，同時提供多項輸出，包括：顯示適配器是否存在的數位輸出、顯示適配器或電池電流的類比輸出，以及顯示適配器電流超出用戶自定義閥值的數位輸出。MAX17435尤其適用於筆記型電腦、PDA、移動通訊裝置，以及採用二至四個鋰離子電池供電的裝置。
特點
- 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
應用
- 2 to 4 Li+ Cell Battery-Powered Devices
- Notebook Computers
- PDAs and Mobile Communicators
Application Circuit
發佈日期: 2011-02-23
| 更新日期: 2023-04-21