Protective circuit for Schottky power diode - uses parallel-low power Schottky diode whose avalanche voltage is lower than limit voltage of main diode

摘要

The protective circuit used for a Schottky power diode employs at least one Schottky diode (7) of small power, but with the same transmission direction, which is connected in parallel with the power diode (1). The avalanche voltage of this diode of low power is less than the limiting voltage of the Schottky power diode. A limiting resistor may be connected in series with the diode of lower power and the series connection thus made be connected in parallel with the power diode. The avalanche voltage of the low-power diode may be at least equal to the rated voltage of the power diode.