08 Mar 2017 | Geneva

English

New Best-in-Class 900V MOSFETs from STMicroelectronics Enhance Power and Efficiency of Flyback Converters

Power-supply designers can satisfy system demands for higher power and greater efficiency using the latest 900V MDmesh™ K5 super-junction MOSFETs from STMicroelectronics, which deliver best-in-class on-resistance (R_DS(ON)) and dynamic characteristics.

A 900V breakdown voltage assures extra safety margin in systems with high bus voltages. The new series contains the first 900V MOSFETs with R_DS(ON) below 100mΩ, and gives the industry’s best R_DS(ON) among DPAK devices. Also, with the industry’s lowest gate charge (Qg), they ensure faster switching for greater flexibility where a wide input-voltage range is required. These characteristics ensure high efficiency and reliability in all types of flyback converters including standard, quasi-resonant, and active-clamp designs covering power ratings as low as 35W up to 230W or higher. In addition, low input and output capacitances (Ciss, Coss) enable zero-voltage switching with minimal energy loss in half-bridge LLC resonant converters.

The increased safety margin and superior static and dynamic behavior of the new devices enable designers to improve the performance of a wide variety of products such as server power supplies, 3-phase switched-mode power supplies (SMPS), LED lighting supplies, electric-vehicle (EV) chargers, solar generators, welders, industrial drives, and factory automation.

ST’s family of MDmesh K5 super-junction transistors now offers numerous choices at voltage ratings of 800V, 850V, 900V, 950V, 1050V, 1200V, and 1500V. Together with versatile package options including TO-220AB, TO-220FP, TO-247, TO-247 Long Lead, IPAK and I2PAK, as well as D2PAK and DPAK surface-mount power packages, ST’s super-junction devices present designers with a comprehensive portfolio of Very High Voltage (VHV) MOSFETs.

The latest 900V MDmesh™ K5 MOSFETs are available immediately, priced from $0.73 for the STD4N90K5 in DPAK package, for orders of 1000 pieces.

For further information please visit www.st.com/mdmeshk5.