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Infineon Announces New MOSFETs And Fan Motor Controller

Infineon announced two new products: the CoolMOS CP series of metal-oxide semiconductor field-effect transistors (MOSFETs) for high-efficiency power supplies used in telecommunications, notebook computer and consumer appliances. The second novelty is the TDA21801 Fan Speed Controller IC used to create a flexible, low-cost subsystem to control the speed of power supply cooling fans used in such applications as personal computers, industrial and medical equipment.

CoolMOS CP MOSFETs are intended for the PFC (power factor correction) and PWM (pulse width modulation) stages in medium-level power supply applications, such as telecommunications, notebook adapter and consumer devices. The new products have a voltage-blocking capability of 600V in a wide variety of package types. The low on-state resistance and low gate charge allow designers to significantly reduce the conduction and switching losses of power supplies. Alternatively, power supply output can be increased without changing other aspects of the design, resulting in lower system cost per watt of rated power.

At a typical price of between $0.70 and $1.80 in quantities of 100,000 (depending upon ohmic value) in a TO220 package, the CoolMOS CP series is available in the following packages: TO-252 D-PAK, TO-220, TO-220 FP (available by the end of 2005), TO-263 (D2PAK), TO-247.

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. 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.

The TDA21801 can adjust fan speed from 750 rpm to 4,000 rpm and its OTP capability is easily implemented and flexible. 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 (Restriction of the Use of Certain Hazardous Substances)-compliant SO-8 package, at a price of $0.70 in quantities of 50,000.

Source: Infineon

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