Control method of LCC resonant DC-DC converter and device thereof
A converter control, DC-DC technology, applied in output power conversion devices, control/regulation systems, conversion of DC power input to DC power output, etc. The soft switching range of resonant DC-DC converters is limited, and the effect of reducing voltage and current stress and changing the switching frequency range is achieved.
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[0021] Hereinafter, the present invention will be further described in detail through specific examples in conjunction with the drawings.
[0022] figure 1 It is a block diagram of the system structure of the present invention, which includes an output voltage sampling circuit 100, an error amplifier circuit 200, a first modulation circuit 310, a second modulation circuit 320, and a switch drive circuit 400. Furthermore, the output voltage sampling circuit 100 collects the output voltage and generates an output signal v o To the error amplifier circuit 200; the error amplifier circuit 200 passes v o And internal reference voltage V ref Perform error amplification and output error signal v e To the first modulation circuit 310 and the second modulation circuit 320; the first modulation circuit 310 outputs the first modulation signal v saw1 To the second modulation circuit 320; the second modulation circuit 320 outputs the second modulation signal v saw2 Compared with the result v...
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