International Rectifier Introduces Platinum-Diffused Diodes with High Blocking Voltage Characteristics to Enhance Efficiency and Performance

April 12, 2004 - International Rectifier, IR® introduces the 600V-rated 60APU06 and 60EPU06 platinum (Pt) diffused Ultrafast recovery epitaxial diodes. The platinum diffusion process accurately controls charge carrier lifetime. The ability to set or adjust diode recovery (speed) characteristics enables optimized performance and efficiency. Applications for the new diodes include output rectification in industrial switch mode power supplies such as high frequency and AC TIG (tungsten inert gas) welding machines in the 80A to 200A DC output range, where 600V devices are recommended due to voltage spikes. Multiple diodes can be placed in parallel for higher current ratings.

The new diodes expand the IR discrete FRED Pt portfolio, and now include devices with 200V, 300V, 400V and 600V blocking voltages, and 8A to 60A average current ratings at various speeds. The new platinum devices have a 600V rating and a "soft" recovery current waveshape to reduce or eliminate the need for snubber components. Forward voltage and recovery charge characteristics (trr = 34ns) are optimized to allow high current operation at switching frequency above 50kHz. Low forward voltage drop reduces conduction losses and low reverse recovery energy reduces switching losses. All features combine to reduce power dissipation, operating temperature, size and weight, while increasing power supply efficiency and reliability.

The low thermal resistance (0.63K/W max.) combined with a high allowable junction temperature (175°C max.) and a forward voltage of 1.42V results in a 60A current rating at 116°C case temperature.

Part Number	Package	VR(V)	I F(AV)(A)@ Tc=116°C	trr(ns)Typ.	VF(V)Max.	IR(uA)Max.
60APU06	TO-247(3-lead)	600	60	34	1.68	50
60EPU06	TO-247(2-lead)	600	60	34	1.68	50
Note: Tj=25°C unless otherwise specified

Pricing and Availability
Pricing is US $2.56 each for the 60APU06 in the three-lead TO-247 package or the 60EPU06 in the two-lead TO-247 package in 10,000-unit quantities. The new devices are available now.