FEEDBACK CONTROL CIRCUIT FOR POWER CONVERTER AND POWER CONVERTER SYSTEM
First Claim
1. A feedback control circuit for a power converter, comprising:
- a sampling network, configured to sample an input of the power converter or an output of the power converter, and output a first sampled signal;
a filtering network, configured to receive the first sampled signal, and output a second sampled signal;
the filtering network filtering a ripple signal at a preset frequency out from the first sampled signal, so as to remain signals in the first sampled signal outside the preset frequency, while maintaining a phase delay of the second sampled signal relative to the first sampled signal within a preset range;
a control and drive circuit, configured to receive the second sampled signal, and regulate a control signal that is to be outputted from the control and drive circuit to the power converter in accordance with the second sampled signal.
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Abstract
A feedback control circuit for a power converter and a power converter system, includes a sampling network, configured to sample an input or output of the power converter, and output a first sampled signal; a filtering network, configured to receive the first sampled signal and output a second sampled signal, the filtering network filtering a ripple signal at a preset frequency out from the first sampled signal, so as to remain signals therein outside the preset frequency, while maintaining a phase delay between the second sampled signal and the first sampled signal within a preset range; a control and drive circuit, configured to receive the second sampled signal, and regulate in accordance with the second sampled signal a control signal outputted from the control and drive circuit to the power converter.
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Citations
16 Claims
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1. A feedback control circuit for a power converter, comprising:
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a sampling network, configured to sample an input of the power converter or an output of the power converter, and output a first sampled signal; a filtering network, configured to receive the first sampled signal, and output a second sampled signal;
the filtering network filtering a ripple signal at a preset frequency out from the first sampled signal, so as to remain signals in the first sampled signal outside the preset frequency, while maintaining a phase delay of the second sampled signal relative to the first sampled signal within a preset range;a control and drive circuit, configured to receive the second sampled signal, and regulate a control signal that is to be outputted from the control and drive circuit to the power converter in accordance with the second sampled signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification