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Photocoupler high voltage regulator circuit diagram

2015-03-21 12:35  
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Photocoupler high voltage regulator circuit diagram
It is the series regulator circuit, and the amplifier tubes need to use relatively high-voltage transistor, if it uses the good insulation characteristics of optical coupler between input and output, it will realize high-pressure control. In the (a) and (b) figures, they are the high-voltage regulator circuit with using optocoupler. In Figure (a), when the output voltage rises for some reason, the BG5 bias increases, light-emitting diode's forward current increases, so that the phototransistor collector junction voltage decreases.