How to design a 100v,0.1amp output voltage regulator using tl783 (circuit diagram)?
Very few voltage regulators will work at voltages over 30-40 volts. But the TL783 is an exception, as it can operate up to 125 volts. Download the datasheet from the reference, it has schematics. Actually, you can probably only use it up to 100 volts or maybe less, as the unregulated input can’t be any higher than 125 volts or the device will be smoke. The difficulty in this example is designing an unregulated supply that never goes above 125 volts or below 105 volts under all load and line conditions. That is a voltage of 115 ± 10 volts DC. Given that the AC line can vary by as much as ±10%… Note that you will need a heat sink, as worse case power is 125*0.1 or 12 watts. If I really had to design a 0 to 100 volt supply, I’d find something a little better than the 783, as the problems of designing the raw supply to feed it are difficult. I’d need a pre-regulator of some sort, such as a 125 volt zener and a HV power transistor to ensure the voltage to the 783 never got above 125 volts
