Circuit for regulating lower limit of limiting switch power source voltage
A power supply voltage and limit switch technology, which is applied in the direction of adjusting electric variables, control/regulation systems, instruments, etc., can solve problems such as loop instability, wide adjustable range, low lower limit output voltage, etc. It is easy to achieve stability and improve Power supply reliability, the effect of reducing the adjustment range
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[0011] exist figure 1 , figure 2 The schematic block diagram shown includes: an input circuit, a main power circuit, an output circuit, a feedback circuit and a main control circuit connected in sequence, the output pulse of the main control circuit controls the opening and closing of the main power circuit, It is characterized in that the feedback circuit includes a controllable switch; the port 1 of the controllable switch detects the output voltage, and the ports 2 and 3 of the controllable switch are controlled to short-circuit or disconnect according to the detected output voltage to connect or disconnect the feedback circuit.
[0012] When the output voltage is greater than the set minimum voltage, the controllable switch is turned on, and the input voltage is rectified and filtered by the input circuit and then added to the main power circuit. After the DC-AC is converted into a rectangular wave in the main power circuit, the output circuit It is rectified and filtere...
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