SYSTEMS AND METHODS FOR CURRENT CONTROL OF POWER CONVERSION SYSTEMS
First Claim
1. A system controller for regulating an output current of a power conversion system, the system controller comprising:
- a driving component configured to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of the power conversion system, the drive signal being associated with at least a switching period, the switching period including an on-time period and a demagnetization period;
a demagnetization detector configured to receive a feedback signal associated with an output voltage of the power conversion system and generate a detection signal based on at least information associated with the feedback signal, the detection signal indicating the demagnetization period;
a current-regulation component configured to receive the drive signal, the detection signal and a current-sensing signal and output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and the current sensing signal, the current-sensing signal representing the primary current in magnitude; and
a signal processing component configured to receive the current-regulation signal and output a processed signal to the driving component in order to generate the drive signal.
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Abstract
System and method for regulating an output current of a power conversion system. An example system controller for regulating an output current of a power conversion system includes a driving component, a demagnetization detector, a current-regulation component, and a signal processing component. The driving component is configured to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of the power conversion system. The demagnetization detector is configured to receive a feedback signal associated with an output voltage of the power conversion system and generate a detection signal based on at least information associated with the feedback signal. The current-regulation component is configured to receive the drive signal, the detection signal and a current-sensing signal and output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and the current sensing signal.
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Citations
4 Claims
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1. A system controller for regulating an output current of a power conversion system, the system controller comprising:
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a driving component configured to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of the power conversion system, the drive signal being associated with at least a switching period, the switching period including an on-time period and a demagnetization period; a demagnetization detector configured to receive a feedback signal associated with an output voltage of the power conversion system and generate a detection signal based on at least information associated with the feedback signal, the detection signal indicating the demagnetization period; a current-regulation component configured to receive the drive signal, the detection signal and a current-sensing signal and output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and the current sensing signal, the current-sensing signal representing the primary current in magnitude; and a signal processing component configured to receive the current-regulation signal and output a processed signal to the driving component in order to generate the drive signal. - View Dependent Claims (2, 3)
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4-41. -41. (canceled)
Specification