FluxBench

PWM

Pulse Width Modulation - a technique for controlling power by rapidly switching a signal on and off. Used for dimming LEDs and controlling motors.

concept

PWM

PWM (Pulse Width Modulation) is a technique for controlling Power by rapidly switching a signal on and off.

Definition

PWM varies the duty cycle (percentage of time the signal is high) to control average Power delivered. Common in microcontrollers for dimming LEDs and controlling motor speed.

Key Points

  • Duty cycle determines average Power
  • Frequency typically 1-20kHz
  • Used for analog-like control with digital signals
  • Common for controlling LED brightness