INTERNATIONAL Rectifier (IR), represented by Arrow Electronics , has introduced the new 600V K-Series HEXFET power MOSFETs that have 45 per cent lower on-resistance and can handle 75 per cent more current in the TO-247 package compared with previous generation devices.
The new MOSFETs are designed for hard-switched topologies found in off-line switch-mode power supplies (SMPS) rated at 300W and above for telecom and datacom systems. In addition, IR is expanding its offering of 500V K-Series MOSFETs for the same applications.
The two voltage ranges and the expanded selection of current and on-resistance levels enable designers to meet the cost and performance objectives of most designs.
While the 600V-rated devices offer the added safety margins required by some designs, the 500V devices provide an opportunity to increase efficiency at a lower cost.
The new K-Series devices increase efficiency, output power and power density compared with previous generation devices, reducing the number of devices and shrinking heatsinks.
Higher efficiency translates into lower temperature and increased reliability, a significant factor in telecom and datacom systems.
The new K-Series MOSFETs have up to four times higher dV/dt immunity than previous generation devices and offer better ruggedness. Low gate charge makes the new devices easy to drive.
The new hard-switched MOSFETs are available immediately. Pricing begins at US$1.96 each for the 600V devices, and US$1.39 each for the 500V devices, in 10,000-unit quantities. Data sheets can be found at www.irf.com.