PWMVerteiler

A PWMVerteiler, or PWM distributor, is a circuit or device that takes a single pulse width modulated PWM control signal and reproduces it across multiple outputs. Its main purpose is to drive several loads from one PWM source, ensuring that all outputs share the same duty cycle. PWMVerteiler can be implemented as a simple passive splitter or as an active buffer to improve signal integrity and drive capability.

In a passive splitter, the PWM signal is branched to several outputs directly. While simple and inexpensive, this approach can be sensitive to loading differences between outputs. If the connected loads vary significantly or demand more current, the waveform may become distorted and duty cycle may drift. For reliable operation, most applications employ active buffering or dedicated PWM distribution ICs that reproduce the input waveform on each output with low skew and adequate drive strength.

Typical applications include multi-channel LED drivers, robotics and automation where a single controller must drive several servos or motors, multi-axis CNC systems, and test equipment that requires synchronized PWM signals. Some designs also incorporate level shifting or galvanic isolation to match different voltage domains or to improve safety and noise immunity.

Key design considerations are the maximum number of outputs, per-output drive current, total current, propagation delay, and timing skew between channels. Output stages often use buffers, transistors, or MOSFET drivers to handle load current, while the distribution network focuses on maintaining consistent duty cycle and synchronized timing across all outputs.

See also: PWM, buffer, motor driver, gate driver.