数据手册：MAX1645, MAX1645A SMBus™总线控制，具有输入限流及安全定时器，为各种化学类型的电池提供智能充电 .pdf [英文Rev.2(PDF,344kB)]
{状况：生产中。}
The MAX1645 is a high-efficiency battery charger capable of charging batteries of any chemistry type. It uses the Intel® System Management Bus (SMBus™) to control voltage and current charge outputs.
When charging lithium-ion (Li+) batteries, the MAX1645 automatically transitions from regulating current to regulating voltage. The MAX1645 can also limit line input current so as not to exceed a predetermined current drawn from the DC source. A 175sec charge safety timer prevents "runaway charging" should the MAX1645 stop receiving charging voltage/current commands.
The MAX1645 employs a next-generation synchronous buck control circuitry that lowers the minimum input-to-output voltage drop by allowing the duty cycle to exceed 99%. The MAX1645 can easily charge one to four series Li+ cells.
产品关键特性
- Input Current Limiting
- 175sec Charge Safety Timeout
- 128mA Wake-Up Charge
- Charges Any Chemistry Battery: Li+, NiCd, NiMH, Lead Acid, etc.
- Intel SMBus 2-Wire Serial Interface
- Compliant with Level 2 Smart Battery Charger Spec. Rev. 1.0
- +8V to +28V Input Voltage Range
- Up to 18.4V Battery Voltage
- 11-Bit Battery Voltage Setting
- ±0.8% Output Voltage Accuracy with Internal Reference
- 3A max Battery Charge Current
- 6-Bit Charge Current Setting
- 99.99% max Duty Cycle for Low-Dropout Operation
- Load/Source Switchover Drivers
- >97% Efficiency
| 应用与使用范围
- 笔记本电脑
- PDA及其它手持设备
- 销售终端机(POS)
|
典型工作电路
芯片订购型号
| 订购型号 | 产品状态 | 封装形式 | 工作温度 | RoHS/无铅 |
| MAX1645AEEI | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1645AEEI+ | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1645AEEI+T | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1645AEEI-T | 生产中 | QSOP；28引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1645AEVKIT | 生产中 | KIT；封装信息 | | 参考数据资料 |
| MAX1645AEVSYS | 生产中 | 封装信息 | | 参考数据资料 |
功能接近器件
评估板与开发套件
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