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DC Voltage Regulator Power Circuit With Output Of 30V/0.2A

2014-11-13 04:00  
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DC Voltage Regulator Power Circuit With Output Of 30V/0.2A
The picture shows the DC voltage regulator power circuit with output of 30V/0.2A. In the circuit it connects the zener diode VS2 to the upside, thus it could make the differencial amplifier VT1 and VT2's collector and base electrode be in low-voltage mode when their output voltage is high. At this time in order to make the VT1 and VT2 still have adequate working point, it could make the differencial amplifier emitter electrode resistance R5's value be bigger. The differencial amplifier's output port is lead out from the VT2's collector electrode. This would make the circuit keep the negative feedback and have the voltage regulation function.