PWM fans control speed with a low power loss in the switching device

Now available from Mouser, Delta Electronics' pulse width modulation (PWM) fans regulate the voltage signal between fully on and fully off, controlling the speed of a fan with a very low power loss in the switching device. When a switch is off, there is practically no current, and when it is on, there is almost no voltage drop across the switch. As a result, power loss is close to zero. A wide range of options includes power ratings from 1.68W to over 100W, noise ratings from 25dBA to 80dBA and fan speeds from 3200rpm to over 16,000rpm.