Platinum-Diffused Diodes Boost Switcher Performance

Performing output rectification in industrial switch mode power supplies, particularly those found in high frequency and tungsten inert gas welding machines, the 60APU06 and 60EPU06 epitaxial, platinum-diffused diodes provide the ability to set or adjust diode-recovery speeds. Also considered desirable, both devices specify a reverse voltage (VR) of 600V and operate at switching frequencies beyond 50 kHz. They exhibit identical specifications with the exception of packaging: the 60APU06 comes in a three-lead TO-247 and 60EPU06 is available in a two-lead TO-247. Common features include a trr of 34 ns, maximum thermal resistance of 0.63 K/W, maximum junction temperature of 175°C, forward voltage of 1.42V (1.68V maximum), and a current rating of 60A at a case temperature of 116°C. Price for either diode is $2.56 each/10,000. For more information, contact Wayne Yoshida at INTERNATIONAL RECTIFIER, El Segundo, CA. (310) 252-7726.