Vishay has launched 34 new 600 V FRED Pt Hyperfast and Ultrafast rectifiers in six power packages. Combining very fast and soft recovery time with low forward voltage drop and reverse recovery charge, the new devices reduce switching and conduction losses in high-efficiency power factor correction (PFC) in switch mode power supply (SMPS) applications.
The devices are offered with 8 A, 15 A and 30 A forward currents for 200 W to 3 kW power supplies in a wide range of applications, including DCM, CRM and CCM PFC in SMPS applications; input booster circuits; high-frequency output rectification; freewheeling diodes; and adapters. Typical end products will include desktop PCs, servers, telecom equipment, air conditioners, UPS, industrial motor drivers and solar inverter systems.
Available in the power TO-220AC, TO-220 FULLPAK, TO-263AB (D2PAK), TO-262 (I2PAK), TO-247AC and modified TO-247AC packages (in addition to bare die/wafers), the rectifiers feature five forward voltage classes from 1,07 V to 3,40 V at 8 A and 15 A, and 2,0 V to 2,65 V for 30 A devices. Reverse recovery time at room temperature starts at 17 ns (at IF = 8 A, di/dt = 200 A/μs, VR = 390 V), while reverse recovery charge at +125°C starts at 77 nC (at IF = 8 A, di/dt = 200 A/μs, VR = 390 V).
The new rectifiers are part of Vishay’s Hyperfast ‘H’ and ‘X’ series and Ultrafast ‘L’ series. In addition, the new ‘U’ series was specifically developed for ultrafast soft recovery time. The devices feature an improved chip design for increased reliability, exceeding standard requirements for resistance to moisture and IR stability over time.
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