Introduction
STMicroelectronics has introduced two new families of diodes, STPS and STTH, designed for welding applications. These diodes aim to reduce power losses in welding equipment by minimizing the forward voltage drop.

Main Applications

• Secondary rectification in TIG, MIG, and plasma welding equipment.
• PFC boost diodes and freewheeling diodes in the primary stage.

Benefits

• Optimized for welding applications with lower forward voltage (VF) to reduce conduction power losses.
• Lower reverse current (IR) to decrease EMI and thermal runaway risk.
• Cost-effective performance with insulated packages available.
• Reduction of snubber circuits in STPS diodes.

Schottky Technology
The STPS family is designed to operate within the avalanche area, offering advantages over ultrafast devices, such as lower VF, negligible reverse recovery characteristics, and higher junction capacitance for improved EMI behavior.

Main Features

• STPS 170V with very low VF of 0.7V max at Tj = 125°C.
• STTH series available in 200/300/1000/1200V and 400/600V with low VF and trr specifications.
• All devices have low IR and a maximum junction temperature of 175°C.

Ultrafast Technology
The STTH family uses platinum doping to reduce leakage current and offers a range of options for designers, providing low VF or low trr trade-offs to meet various application requirements.

Product Range

• 170V Power Schottky: STPSxxx170xx series with various current ratings and package options.
• Ultrafast rectifiers: STTH series available in multiple voltage and current ratings with different package types.

Conclusion
STMicroelectronics' new diode families provide efficient solutions for modern welding equipment, offering reduced power losses and improved performance through advanced technologies.