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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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主要特征

简化框图

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数据资料 电源选择器,用于双电池系统 May 15, 2017

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主要特征

  • 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/用途

  • 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

描述

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.

简化框图

MAX1773、MAX1773A:典型工作电路 MAX1773、MAX1773A:典型工作电路 Zoom icon

Technical Docs

数据资料 电源选择器,用于双电池系统 May 15, 2017

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心