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Hyper-fast rectifier

18th August 2015


The DSR8F600 600V 8A hyper-fast rectifier introduced by Diodes Incorporated has been designed specifically for use as a boost diode for power-factor correction (PFC) and continuous conduction mode (CCM) applications.

The target market is in switched-mode power supplies (SMPS) that need to deliver a high output, greater than 75W, in end-equipment such as flat-panel TVs, servers and telecoms systems, where new regulatory standards in Europe, the USA, Japan and China require improved energy efficiency.

A hyper-fast 20ns reverse-recovery time reduces PFC MOSFET switching losses, increases switching speed and improves energy efficiency, while a very fast soft recovery capability ensures ringing and EMI interference are reduced. Boost diode recovery losses are minimised by a low 3.9A reverse-recovery current, which also reduces power dissipation in the MOSFET and lowers the risk of system failure. A low 1.95V forward voltage drop also minimises boost diode conduction losses.

Aimed at designers of PFC circuits who need to achieve the lowest possible energy losses, the DSR8F600 provides best-in-class performance, generating the least noise and achieving the highest power efficiency. The DSR8F600 is the first of a family of hyper-fast rectifiers; future introductions will provide even higher voltages and currents.







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