Hello I have a question on switch mode power supply diodes. Usually switch mode power supplies have a rectifying diode at the transformer output. Do these diodes regulate the transformer output or do they just rectify the output?
For example a transformer with a 12 volt output ac when the diode is put on the output and then filtered charges the capacitor at peak voltage will then be higher
so what i want to know is i have a switch mode power supply that has a winding and the a diode i have never seen before (a black diode with a green band) and there is no voltage regulator just a 35v capacitor and inductor and then another capacitor like the circuit shown on the output So is this type of diode a normal diode how would i determine what it is (also the SMPS is out of a dvd player) it has a similar winding but negative. which works but this diode is burned out I know diodes have a voltage drop that why I'm asking this i just want to substitute it.