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ランプ調光などのためのシンプルな PWM 回路

2023/ 08/ 09 2025/ 06/ 28

**概要** # **概要** * パルス幅変調 (PWM) は、ランプの調光、モーター制御、または電流や電圧を変更できる効率的な方法を要するその他のアプリケーションに役立ちます。

デューティサイクルは電圧 (外部またはポットから) によって制御され、デューティサイクルは 0% (フルオフ) から 100% (フルオン) まで変化します。
また、動作電圧範囲も 2V ～ 36V と広いです。
この回路に必要なのは、コンパレータ（1 つの LM393 パッケージまたは 1/2 の LM339 パッケージを2つ）と、 7 つの受動部品 (オプションのポット制御回路の 3 つを除く) だけです。
外部制御電圧 (Mod_In) またはオプションのポット制御回路によって 0% (完全オフ) から 100% (完全オン) まで連続的に変化できるデューティサイクルを持つ PWM 信号を生成します。

本文

Simple PWM Circuit For Lamp Dimming, etc., Improves On 555 PWM Circuits

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