Qspeed Introduces New Series of 600V Rectifiers

Qspeed Semiconductor introduced the H-Series family aimed at helping power supply manufacturers cost-effectively meet the challenges of today’s high performance systems. Building on previous generations, Qspeed’s new 600V H-Series power factor correction (PFC) rectifiers have even lower reverse recovery charge (Q_RR), which the company says provides the highest switching efficiency of any silicon diode on the market.

Qspeed PFC diodes help designers meet demanding performance specifications by increasing system efficiency, reducing EMI and enabling the elimination or downsizing of other components. Because Qspeed solutions result in lower operating temperature, fewer components and reduced board/heatsink requirements, they are ideal for increasing power density, reducing costs and/or improving reliability. With the best performance-to-cost ratio of any commercially available devices, Qspeed’s products lead the industry in value.

The 600V H-Series 3A-12A products have a lower Q_RR temperature coefficient that minimizes switching losses at higher operating temperatures. They also have lower forward voltage (V_F) for reduced conduction mode losses. Like all Qspeed diodes, the H-Series has a soft recovery waveform that results in lower EMI emissions. The devices are packaged in an internally isolated TO-220 with improved thermal resistance allowing this series to be extended to 12A.

Qspeed’s lower harmonic emissions improve the system EMI ratings and allow for the use of fewer snubbers. Qspeed’s high diode switching efficiency not only improves power supply efficiency but also reduces heat generation. In most cases, these benefits are achieved even after downsizing the PFC MOSFET and/or heatsink. Fewer components and lower operating temperatures enable higher power density designs and improve system reliability. By downsizing or eliminating components, designers lower their total bill of materials (BOM) costs.

"Our power supply customers are challenged with achieving unprecedented levels of efficiency and power density in a highly price competitive market," said Mike Heitzman, president and CEO of Qspeed Semiconductor. "The H-Series has a unique combination of performance features that enables designers to meet higher performance specifications and regulatory requirements while reducing BOM costs and development schedules."

Engineering samples of the H-Series diodes are available now and production quantities are planned for Q1 2010.