SYSTEMS AND METHODS FOR VOLTAGE CONTROL AND CURRENT CONTROL OF POWER CONVERSION SYSTEMS WITH MULTIPLE OPERATION MODES
First Claim
1. A system controller for regulating a power conversion system, the system controller comprising:
- an operation-mode-selection component configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal; and
a driving component configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency;
wherein the operation-mode-selection component is further configured to;
if the output load is determined to be larger than a first load threshold in magnitude and the input signal is determined to be larger than an input threshold, generate the mode-selection signal corresponding to a quasi-resonant mode if the switching frequency is determined to be smaller than a first frequency threshold and larger than a second frequency threshold; and
if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined to be smaller than the input threshold, generate the mode-selection signal corresponding to a continuous conduction mode if the switching frequency is determined to be equal to the second frequency threshold.
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Abstract
System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.
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Citations
53 Claims
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1. A system controller for regulating a power conversion system, the system controller comprising:
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an operation-mode-selection component configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal; and a driving component configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency; wherein the operation-mode-selection component is further configured to; if the output load is determined to be larger than a first load threshold in magnitude and the input signal is determined to be larger than an input threshold, generate the mode-selection signal corresponding to a quasi-resonant mode if the switching frequency is determined to be smaller than a first frequency threshold and larger than a second frequency threshold; and if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined to be smaller than the input threshold, generate the mode-selection signal corresponding to a continuous conduction mode if the switching frequency is determined to be equal to the second frequency threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system controller for regulating a power conversion system, the system controller comprising:
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a driver component configured to output a drive signal in order to affect an output signal of the power conversion system, the drive signal being associated with a switching frequency corresponding to a switching period, the switching period including an on-time period and a demagnetization period; a first sample-and-hold component including a first capacitor and configured to sample and hold a current sensing signal associated with a primary current flowing through a primary winding of the power conversions system at at least a first time during the on-time period and generate a first held sampled signal based on at least information associated with the current sensing signal; a second sample-and-hold component including a second capacitor and configured to sample and hold the current sensing signal at at least a second time during the on-time period and generate a second held sampled signal based on at least information associated with the current sensing signal, the second time being later than the first time; a first switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the first capacitor, the second switch terminal being coupled to the second capacitor, the first switch being further configured to be closed during the demagnetization period and open during the on-time period; a second switch including a third switch terminal and a fourth switch terminal, the third switch terminal being coupled to the first switch terminal, the second switch being further configured to be closed during the demagnetization period and open during the on-time period; and a signal processing component configured to receive a combined signal from the fourth switch terminal if the first switch and the second switch are closed and output a processed signal based on at least information associated with the combined signal to the driver component. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A system controller for regulating a power conversion system, the system controller comprising:
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a driver component configured to output a drive signal in order to affect an output signal of the power conversion system, the drive signal being associated with a switching frequency corresponding to a switching period, the switching period including an on-time period and a demagnetization period; a sample-and-hold component including a first capacitor and configured to sample and hold a current sensing signal associated with a primary current flowing through a primary winding of the power conversions system at a middle point of the on-time period and generate a held sampled signal based on at least information associated with the current sensing signal; a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the first capacitor, the switch being further configured to be closed during the demagnetization period and open during the on-time period; a signal processing component configured to receive a third signal from the second switch terminal if the switch is closed and output a processed signal based on at least information associated with the third signal to the driver component; and an operation-mode-selection component configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal; wherein the driver component is further configured to receive the mode-selection signal and generate the drive signal based on at least information associated with the mode-selection signal. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. A method for regulating a power conversion system, the method comprising:
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receiving a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system; processing information associated with the first signal and the second signal; generating a mode-selection signal based on at least information associated with the first signal and the second signal; receiving the mode-selection signal; processing information associated with the mode-selection signal; and generating a drive signal based on at least information associated with the mode-selection signal; wherein the process for generating a mode-selection signal based on at least information associated with the first signal and the second signal includes; if the output load is determined to be larger than a first load threshold in magnitude and the input signal is determined to be larger than an input threshold, generating the mode-selection signal corresponding to the quasi-resonant mode if the switching frequency is determined to be smaller than a first frequency threshold and larger than a second frequency threshold; and if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined to be smaller than the input threshold, generating the mode-selection signal corresponding to the continuous conduction mode if the switching frequency is determined to be equal to the second frequency threshold. - View Dependent Claims (48, 49)
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50. A method for regulating a power conversion system, the method comprising:
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generating a drive signal in order to affect an output signal of the power conversion system, the drive signal being associated with a switching frequency corresponding to a switching period, the switching period including an on-time period and a demagnetization period; sampling and holding, by at least a first sample-and-hold component, at at least a first time during the on-time period, a current sensing signal in order to generate a first held sampled signal, the current sensing signal being associated with a primary current flowing through a primary winding of the power conversions system, the first sample-and-hold component including a first capacitor; sampling and holding, by at least a second sample-and-hold component, at at least a second time during the on-time period, the current sensing signal in order to generate a second held sampled signal, the second sample-and-hold component including a second capacitor, the second time being later than the first time; generating a combined signal during the demagnetization period by at least a first switch, the first switch including a first switch terminal coupled to the first capacitor and a second switch terminal coupled to the second capacitor; receiving the combined signal by at least a second switch including a third switch terminal and a fourth switch terminal, the third switch terminal being coupled to the first switch terminal; and outputting a processed signal based on at least information associated with the combined signal during the demagnetization period. - View Dependent Claims (51)
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52. A method for regulating a power conversion system, the method comprising:
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receiving a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system; processing information associated with the first signal and the second signal; generating a mode-selection signal based on at least information associated with the first signal and the second signal; receiving the mode-selection signal; processing information associated with the mode-selection signal; generating the drive signal based on at least information associated with the mode-selection signal in order to affect an output signal of the power conversion system, the drive signal being associated with a switching frequency corresponding to a switching period, the switching period including an on-time period and a demagnetization period; sampling and holding, by at least a sample-and-hold component, at a middle point of the on-time period, a current sensing signal in order to generate a held sampled signal, the current sensing signal being associated with a primary current flowing through a primary winding of the power conversions system, the sample-and-hold component including a capacitor; receiving a third signal during the demagnetization period through at least a switch coupled to the capacitor; and outputting a processed signal based on at least information associated with the third signal during the demagnetization period. - View Dependent Claims (53)
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Specification