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Infineon unveils new fan speed controller IC

Posted: 31 Oct 2005     Print Version  Bookmark and Share

Keywords:power systems world  infineon technologies  tda21801  fan speed controller ic 

At last week's Power Systems World tradeshow in Baltimore, Maryland, Infineon Technologies AG announced its TDA21801 fan speed controller IC that helps create a flexible, low-cost subsystem to control the speed of power supply cooling fans used in personal computers and high-end electronics equipment such as computer file servers, and industrial and medical equipment.

The TDA21801 is an intelligent controller that allows manufacturers of cooling fan systems to deliver the functionality of a 4-wire fan using a lower cost 2-wire fan. According to the press release, this yields significant savings by allowing use of a lower cost fan and in reducing the BoM by 25 percent. A typical 4-wire fan solution with OTP (over-temperature protection) requires 27 components, while a 2-wire fan solution using the TDA21801 requires only 13 components, added the company.

The TDA21801 can adjust fan speed from 750rpm to 4,000rpm, which makes it suitable for applications requiring low fan speed to reduce noise levels. Its OTP capability is easily implemented and flexible. For example, said Infineon, it generates an over-temperature early warning signal to prevent data loss in case of thermal faults, and also generates a tachometer signal for additional system monitoring features.

The TDA21801 fan speed controller is available in a RoHS-compliant SO-8 package, and is priced at 70 cents in quantities of 50,000.

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