壓敏電阻與PTC熱敏電阻配合使用
作者:孫丹峰,季幼章 上傳時(shí)間:2015/8/25 10:55:38
摘要:壓敏電阻與PTC熱敏電阻配合使用,利用壓敏電阻過電壓時(shí)產(chǎn)生的電流和溫度使熱敏電阻響應(yīng)迅速,利用熱敏電阻阻值上升對(duì)電壓和電流的影響,反過來對(duì)壓敏電阻進(jìn)行保護(hù),從而組成電源的保護(hù)電路。本文綜述了在熒光燈預(yù)熱啟動(dòng)、電能儀表、LED驅(qū)動(dòng)電源、通信保安單元等中的應(yīng)用。
敘詞:壓敏電阻 PTC熱敏電阻 配合使用
Abstract:The varistor is used in conjunction with the PTC thermistor. The current and temperature produced by the over-voltage of the varistor makes the thermistor response promptly. In return, the influence of the increasing resistance of the thermistor on voltage and current can protect the varistor. As a result, powers protective circuit is formed. This paper analyzes its application in preheating start of fluorescent lamp, power meter, LED-driven power, communication security unit.
Keyword:Varistor, PTC thermistor, Used in conjunction
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