Positive converter circuit diagram composed of TDA4718

Published:2011/7/24 21:28:00 Author:Ecco | Keyword: Positive converter | From:SeekIC

The positive converter circuit composed of TDA4718 is shown as the chart, and it can convert 220V AC voltage to 5V/10A DC output circuit. In the circuit, the tertiary winding N3, which has the same turns with the primary winding N1, can degauss the core of the transformer during VT1 deadline period, and it charges for filter capacitor C3 by the high-speed diode VD3 in order to improve the conversion efficiency. Self-resonant frequency is determined by the RT and CT. According to component parameters in the diagram, the oscillation frequency is 50kHZ.



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