Reducing Switching Losses and Increasing Efficiency, Devices Combine Low Qrr Down to 105 nC With VF Down to 1.45 V and Low Junction Capacitance and Recovery Time
Vishay Intertechnology, Inc. expanded its Gen 7 platform of 1200 V FRED Pt Hyperfast rectifiers with four new devices in the eSMP series SlimSMA HV (DO-221AC) package. Optimized for industrial and automotive applications, the 1 A and 2 A rectifiers not only offer the best trade-off between reverse recovery charge (Qrr) and forward voltage drop for devices in their class, but also provide the lowest junction capacitance and recovery time.
The Vishay Semiconductors rectifiers released, include the VS-E7JX0112-M3 and VS-E7JX0212-M3, and AEC-Q101 qualified VS-E7JX0112HM3 and VS-E7JX0212HM3. To reduce switching losses and increase efficiency, the devices combine fast recovery times down to 45 ns with Qrr down to 105 nC typical, forward voltage drop down to 1.45 V, and junction capacitance down to 2.5 pF. The robust rectifiers offer non-repetitive peak surge current up to 21 A in a compact package measuring 2.6 mm by 5.2 mm with a low 0.95 mm profile, compared to 2.3 mm for the competing SMA package with a similar footprint. Combined with a minimum 3.2 mm creepage distance and molding compound with a comparative tracking index (CTI) ≥ 600 (Material Group I), the devices reduce component counts and lower BOM costs based on IEC 60664-1 requirements for high voltage applications.
The VS-E7JX0112-M3, VS-E7JX0112HM3, VS-E7JX0212-M3, and VS-E7JX0212HM3 will serve as clamp, snubber, and freewheeling diodes in flyback auxiliary power supplies and high frequency rectifiers for bootstrap driver functionality, while providing desaturation protection for the latest fast switching IGBTs and high voltage Si / SiC MOSFETs. Typical applications for the devices include industrial drives and tools, on-board chargers and motors for electric vehicles (EV), energy generation and storage systems, and Ćuk converters and industrial LED SEPIC circuitry.
The rectifiers feature a planar structure and platinum doped lifetime control that guarantee system reliability and robustness without compromising on performance, while their optimized stored charge and low recovery current minimize switching losses and reduce power dissipation. RoHS-compliant and halogen-free, the devices feature a Moisture Sensitivity Level of 1 in accordance with J-STD-020 and offer high temperature operation to +175 °C.
