Fan motor controller

Dec. 8, 2005
The TDA21801 is an intelligent controller that lets cooling-fan manufacturers deliver the functions of a four-wire fan using a less-expensive two-wire fan.

The result is a bill of materials that drops by 25%. A typical four-wire fan with overtemperature protection requires 27 components, while a two-wire fan using the new chip requires only 13 components. The TDA21801 can adjust fan speed from 750 to 4,000 rpm, making it a candidate for applications that need low fan speed to reduce noise levels. It generates an overtemperature early warning signal to prevent data loss in case of thermal faults, and also generates a tachometer signal for system monitoring features. The TDA21801 fan speed controller comes in a RoHS-compliant SO-8 package, and costs $0.70 in quantities of 50,000.

Infineon Technologies AG, 1730 North First St., San Jose, CA 95112, (408) 501-6000, www.infineon.com

Sponsored Recommendations

June 27, 2025
Ensure workplace safety and compliance with our comprehensive Lockout/Tagout (LOTO) Safety Training course. Learn critical procedures to prevent serious injuries.
June 27, 2025
Join our expert webinar to discover essential safety control measures and best practices for engineering a truly safe and compliant industrial environment.
June 25, 2025
An innovative aircraft with electric drives combines the best of both worlds. The cross between drone and helicopter could mean significantly faster and more efficient air emergency...
June 25, 2025
Effective when other materials fail, ceramics are particularly suitable for applications requiring wear and chemical resistance, sliding characteristics or biocompatibility. Discover...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!