Low Capacitance Schottky Signal Diode Negligible Switching Losses

Low Capacitance Schottky Signal Diode Negligible Switching Losses

Schottky Signal Diode Features

The plastic package carries Underwriters Laboratory

Flammability Classification 94V-0

Idea for printed circuit board

High forward surge current capability

High temperature soldering guaranteed

Schottky Signal Diode Applications

Freewheeling diodes

Polarity protection application

DC-DC converters

Schottky Signal Diode Advantage

SBD has the advantages of high switching frequency and low forward voltage, but its reverse breakdown voltage is relatively low, mostly not higher than 60V, and the maximum is only about 100V, which limits its application range. For example, in the switching power supply (SMPS) and power factor correction (PFC) circuits, the freewheeling diode of the power switching device, the transformer secondary uses a high-frequency rectifier diode of 100V or more, and the RCD snubber circuit uses a high-speed diode of 600V to 1.2kV. The PFC boost uses a 600V diode, etc., and only uses a fast recovery epitaxial diode (FRED) and an ultra fast recovery diode (UFRD). The reverse recovery time Trr of UFRD is also above 20 ns, which cannot meet the needs of SMPS of 1 MHz to 3 MHz in fields such as space stations. Even with a SMPS with a hard switch of 100 kHz, due to the large conduction loss and switching loss of the UFRD, the case temperature is high, and a large heat sink is required, so that the volume and weight of the SMPS are increased, which is not compatible with miniaturization and thinning. The development trend. Therefore, the development of high-pressure SBD above 100V has always been a research topic and a hot spot of concern. In recent years, SBD has made breakthroughs. High-voltage SBDs of 150V and 200V have been launched. SBDs with more than 1kV made of new materials have also been successfully developed, thus injecting new vitality and vitality into their applications.