This paper introduces the principle of regulator IC TL499AC.Themethod of circuit design of composing UPS with TL499AC and its application are discussed too.是什么意思_This paper introduces the principle of regulator IC TL499AC.Themethod of circuit design of composing UPS with TL499AC and its application are discussed too.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句