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요약정보
5V直流继电器的驱动板设计 / Designed Driving Circuit Board for 5V DC Relay
Resource Type
Academic Journal
Authors
程法勇
;
张凯虹
;
Cheng Fa-yong
;
Zhang Kai-hong
Source
电子质量 / Electronics Quality
. (5):24-28
Subject
继电器
驱动电路
模数转换
达灵顿管
Language
Chinese
ISSN
1003-0107
Online Access
Find it @ DONGA
초록
设计了一种用于小型继电器的驱动电路,可以驱动额定电压为3~24V的直流继电器.该电路模块可以用于各种需要状态切换的电子回路中,易于控制.该电路模块利用一个电源电压和两个控制电压就可以工作,实现一组7个继电器的开关控制,而且易于扩展,多提供一个电压控制信号就可以多实现一组7个继电器的开关控制.该电路利用模数转换器ADC的转换特性,将模拟电压控制信号转换为继电器的开关信号.由于ADC有最小电压分辨率,所以模拟电压控制信号并不需要非常高的精度,普通的稳压电源就可以实现.因为ADC电路的输出电流有限,需要在ADC输出端接一级电流驱动芯片.通常小型继电器的控制电流超过30毫安就可以正常工作,所以ADC输出端的电流驱动芯片选用达灵顿管NUL2003,容易实现且成本低廉.
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