---
name: "pwmfan"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/pwmfan"
---

# pwmfan(4)

PWM fan controller

## NAME

**pwmfan** – PWM fan controller

## SYNOPSIS

**pwmfan\* at fdt?**

## DESCRIPTION

The **pwmfan** driver provides support for fans that are controlled by a PWM signal.

## SEE ALSO

[intro(4)](/intro/4.md)

## HISTORY

The **pwmfan** device driver first appeared in OpenBSD 6.7.

## AUTHORS

The **pwmfan** driver was written by Patrick Wildt ⟨*patrick@blueri.se*⟩.