MAX1773中文资料电源选择器，用于双电池系统数据手册ADI规格书

描述 Description

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.

特性 Features

• 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 Application

• 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

简介

MAX1773属于集成电路（IC）的模数转换器（ADC）。由制造生产的MAX1773模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。