Power supply of electrical equipment
A technology of electrical equipment and power supply, applied in the field of power supply, can solve problems such as significant changes in output voltage, poor output voltage stability, and affecting power supply performance, and achieve the effects of widespread production and popularization, high power output, and significant production practice
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[0122] For the present invention, the working principle of the present invention is illustrated by taking an external AC input of 220V / 50Hz sine wave voltage, synchronous rectification output of A+14V, and dual output of A+5V / A+3.3V.
[0123] After the external AC input voltage signal passes through the electromagnetic interference filter circuit, it is still 220V / 50Hz sine wave voltage, and the waveform and amplitude frequency do not change, but conduction interference and radiation interference are filtered out. After the full-bridge rectification of the high-voltage rectification circuit, it is converted into a DC voltage with only positive waves. figure 2 After the smoothing effect of the middle electrolytic capacitor C100, it becomes a DC voltage of about 310V with a ripple of 100Hz. image 3 The first integrated circuit IC1 in the circuit mainly constitutes a DC chopper and pulse width modulation circuit. After passing through this circuit, the primary side of the trans...
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