MAX1773A

电源选择器,用于双电池系统

电源选择器,降低系统成本和设计复杂度


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说明

The MAX1773/MAX1773A highly integrated ICs serve as the control logic for a system with multiple power sources. They directly drive external P-channel MOSFETs to select from an AC adapter and dual battery sources for charge and discharge. The selection is made based on the presence of the power sources and the state of the batteries. The MAX1773/MAX1773A detect low battery conditions using integrated analog comparators and check for the presence of a battery by using battery thermistor outputs.

The MAX1773/MAX1773A are designed for use with a buck topology charger. They provide a simple and easily controlled solution to a difficult analog power control problem. The MAX1773/MAX1773A provide most of the power source monitoring and selection, freeing the system power management microprocessor (µP) for other tasks. This not only simplifies development of the power management firmware for the µP but also allows the µP to enter standby, thereby reducing system power consumption.

The MAX1773A is recommended for new designs.
MAX1773、MAX1773A:典型工作电路 MAX1773、MAX1773A:典型工作电路 放大+

关键特性

  • 7-MOSFET Topology Offers Low-Cost Solution
  • Automatically Detects and Responds to:
    • Low Battery Voltage Condition
    • Battery Insertion and Removal
    • AC Adapter Presence
  • Direct Drive of P-Channel MOSFETs
  • Simplifies Power Management µP Firmware
  • Extends Battery Life by Allowing Power Management µP to Enter Standby
  • 4.75V to 28V AC Adapter Input Voltage Range
  • Integrated LDO with 1mA Drive Capability
  • Small Footprint 20-Pin TSSOP Package

应用

  • 双电池便携式设备
  • 网络浏览器
  • 笔记本电脑和亚笔记本电脑
  • PDA与手持终端

MAX1773EVKIT: MAX1773评估板
申请可靠性报告: MAX1773A 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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