Pulse-Width Modulation
Pulse-Width Modulation — A technique that controls average power or encodes information by varying the duty cycle of a periodic digital waveform.
Embedded-System Context
PWM controls average power or encodes a control value by changing the duty cycle of a periodic digital waveform. Timer peripherals commonly generate PWM for motor drives, LED dimming, and power electronics, where switching frequency, timer resolution, and load dynamics must be chosen together.
Signal Boundary
A PWM pin does not directly produce an ideal analog voltage. The load, switching stage, and any low-pass filtering determine how the pulse train is converted into average or dynamic behavior.