Technetium Technology classic still Certified diode constant current diode

Schottky diodes advantage: a high switching frequency and the forward voltage drop, etc., but its reverse breakdown voltage is relatively low, most not more than 60V, only up to about 100V, so as to limit its scope of application. As in switching power supplies (SMPS) and power factor correction (PFC) circuits in power switching device freewheeling diode, 100V transformer secondary with more frequency rectifier diode, RCD snubber circuit using high speed diodes and a 600V ~ 1.2kV PFC boost diodes with 600V, and only use the fast recovery epitaxial diodes (FRED), and ultra-fast recovery diode (UFRD). UFRD reverse recovery time of 20ns or more Trr are not sufficient to meet in areas such as the space station need to 1MHz ~ 3MHz with SMPS's. Even the hard-switching of 100kHz SMPS, due UFRD conduction losses and switching losses are large, the shell temperature is high, we need a larger radiator, so that the SMPS volume and weight gain, does not meet the miniaturization and light and thin trends. Therefore, the development of high voltage above 100V SBD, has been the subject people to study and attention. In recent years, SBD has made a breakthrough, 150V and 200V high-voltage SBD already on the market, the use of new materials in excess of 1kV SBD also successfully developed, so that their application has injected new vigor and vitality. Damage of the rectifier diode: rectifier specification models do not match. When replacing the new rectifier tube mistake will work parameters do not meet the requirements put or wired incorrectly, resulting in rectifier breakdown. Rectifier small safety margin. Rectifier over voltage, over current safety margin is too small, so that the rectifier can not afford to over-voltage generator excitation circuit or overcurrent Transient peak attack damage. Technetium Guangdong Electronic Technology Co., Ltd. professional production and sales of various types of rectifier diodes twenty years, the products include: general OJ chip rectifier diode, glass passivation (GPP) rectifier diodes, fast recovery rectifier diodes, fast recovery rectifier diodes, high efficiency rectifier diodes, Schottky rectifier diodes.