DZW75-48/50(50II) high frequency rectifying filtering circuit

Published:2011/11/23 1:27:00 Author:May | Keyword: high frequency rectifying, filtering | From:SeekIC

Positive and negative alternation pulse voltage of high frequency transformer T’s secondary induction pass full wave rectifier composed of high frequency switching diodes V1, V2, then pass L power line filter composed of L1 inductor and capacitor C2, C3, C4 and Z 1 :power supply filter and other smoothing filters,then the output end gets 48V DC voltage output with high and low frequency noise to meet the index demand. The pulse width isdirectly decided bythe output voltage. When the pulse width is wide, the output voltage will be high; if the pulse width is narrow, output voltage islow. In order to measureanddisplay output DC voltage, we can parallel connect a voltmeter in output end. R2 is the leak resistor. FL is thecurrent divider. The voltage value in the justify of FL also can be uses as output current sampling signal and itcan besent to stabilize voltage and limit current. R1, C1 and V3 make up the RCD absorber circuit to absorb overshoot voltage of secondary.



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