Title: Part No. SF10A400H
Introduction:
The step recovery diode is a diode that has to a lesser extent doping level as related to other diodes and known as a voltage-dependent variable capacitor. The doping concentration in this diode is very fewer near to the intersection of the diode. From this, we can answer that charge carries are also less around the junction of the diode. Due to this charging is less close to PN junction of diode that reduces the time from on condition to off condition of a diode. As this diode delivers high switching speed at less frequency so it mainly used as a charge-controlled switch.
Features:
Ultra-fast reverse recovery time for usage in circuits
Low forward voltage & low reverse current drop is present
Low switching loss are there
Working:
A diode shows considerable loss during reverse recovery, i.e., while it switches after the forward-biased state to the reverse-biased state. In the forward-biased (i.e., current-conducting) state, a large quantity of electron and hole carriers is injected into the drift layer. When a diode is reverse-biased, carriers are pushed out of the drift layer up until the forward current turning out to be zero. During this process, a large recovery current flows all the way through the diode in the reverse direction. This current causes a large reverse recovery loss. During forward recovery, only carrier injection happens. Ever Since a large current does not flow, forward recovery exhibits less loss than reverse recovery.
Applications:
In high-speed applications in circuits
In rectification
In switching mode power supplies
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