Automotive Electronics

IR Intros Low-Voltage Benchmark HEXFET Power MOSFETs

International Rectifier (RI, El Segundo, CA) introduced a new family of Low-Voltage Benchmark HEXFET power MOSFETs targeted at applications in the automotive and UPS systems industries. The devices are claimed to offer best-in-class Rds(on) ratings, while providing avalanche ratings that are several times greater than prior HEXFET generations, and more than five times that of any trench devices currently available.The first members of the new product family are the IRF1404, IRFBA1404, IRF1405 and IRFC2907. The IRF1404 is a 40V, 120A/75A part housed in a TO-220, with an Rds(on) of 4 milliohms and an avalanche rating of 2000mJ. The IRFBA1404 is a 40V, 120A/85A part in a Super-220, with an Rds(on) of 3.5 milliohms and an avalanche rating of 2000mJ. The IRF1405 is a 55V, 108A/75A part in a TO-220 package, with an Rds(on) of 5 milliohms and an avalanche rating of 2000mJ. The IRFC2907 is a 75V, 125A/85A part available as a chip only, with an Rds(on) of 3 milliohms and an avalanche rating of 4000mJ. The devices' avalanche ratings compare to ratings for trench devices in the range of 350mJ.With higher avalanche ratings, the new parts are able to withstand higher energies, according to IR. In about 90 percent of automotive applications, the designer can eliminate the external passive devices that traditionally protected the power MOSFET, the firm claims. The new Benchmark types are qualified to the automotive industry's "Q101" reliability guidelines at up to 175 degrees C. Applications for the devices include braking, power steering and the new 42V integrated starter/alternators in cars, as well as the main primary-side switches in UPS inverters. In addition to allowing size reduction and improvement in end product reliability, the new parts are also claimed to enable longer battery life in UPS applications.

International Rectifier Corp.
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