Systems and methods for voltage regulation of primary side regulated power conversion systems with compensation mechanisms
First Claim
1. A system controller for a power converter, the system controller comprising:
- a first signal generator configured to receive a compensation signal and a reference signal and generate a first signal based at least in part on the compensation signal and the reference signal, the first signal being related to a combination of the compensation signal and the reference signal, the compensation signal being related to an on-time period associated with a first switch of the power converter, the first switch being closed during the on-time period;
an error amplifier configured to receive the first signal and a second signal and generate an amplified signal based at least in part on the first signal and the second signal, the second signal being related to a feedback signal of the power converter;
a second signal generator configured to receive the amplified signal and generate a modulation signal based at least in part on the amplified signal; and
a driver configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal;
wherein the system controller is configured to change the drive signal based at least in part on the compensation signal in order to adjust a winding voltage of a winding of the power converter and to at least partially compensate for a change in a forward voltage of a rectifying diode associated with the winding.
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Accused Products
Abstract
Systems and methods are provided for voltage regulation of power conversion systems. An example system controller includes: a first sampling component configured to sample a sensing signal and determine a compensation signal based on at least in part on the sensing signal, the sensing signal being associated with a first current flowing through a primary winding of a power conversion system; a signal processing component configured to receive a feedback signal and the compensation signal and generate a first signal based at least in part on the feedback signal and the compensation signal, the feedback signal being associated with an auxiliary winding coupled with a secondary winding of the power conversion system; an error amplifier configured to receive the first signal and a reference signal and generate an amplified signal based at least in part on the first signal and the reference signal.
16 Citations
15 Claims
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1. A system controller for a power converter, the system controller comprising:
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a first signal generator configured to receive a compensation signal and a reference signal and generate a first signal based at least in part on the compensation signal and the reference signal, the first signal being related to a combination of the compensation signal and the reference signal, the compensation signal being related to an on-time period associated with a first switch of the power converter, the first switch being closed during the on-time period; an error amplifier configured to receive the first signal and a second signal and generate an amplified signal based at least in part on the first signal and the second signal, the second signal being related to a feedback signal of the power converter; a second signal generator configured to receive the amplified signal and generate a modulation signal based at least in part on the amplified signal; and a driver configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal; wherein the system controller is configured to change the drive signal based at least in part on the compensation signal in order to adjust a winding voltage of a winding of the power converter and to at least partially compensate for a change in a forward voltage of a rectifying diode associated with the winding. - View Dependent Claims (2, 3, 4)
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5. A system controller for a power converter, the system controller comprising:
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a feed-forward signal generator configured to receive an amplified signal and generate a first signal based at least in part on the amplified signal, the amplified signal being related to a feedback signal of the power converter; a filter configured to receive the amplified signal and generate a second signal based at least in part on the amplified signal; a modulation signal generator configured to receive a compensation signal and a third signal and generate a modulation signal based at least in part on the compensation signal and the third signal, the compensation signal being related to a combination of the first signal and the second signal; and a driver configured to receive the modulation signal and generate a drive signal based at least in part on the modulation signal to affect a current. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method for a power converter, the method comprising:
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generating a first signal based at least in part on a compensation signal and a reference signal, the first signal being related to a combination of the compensation signal and the reference signal, the compensation signal being related to an on-time period associated with a current flowing through a first winding of the power converter; receiving the first signal and a second signal, the second signal being related to a feedback signal of the power converter; generating an amplified signal based at least in part on the first signal and the second signal; generating a modulation signal based at least in part on the amplified signal; and outputting a drive signal based at least in part on the modulation signal to affect the current; wherein the outputting a drive signal based at least in part on the modulation signal to affect the current includes;
changing the drive signal based at least in part on the compensation signal in order to adjust a winding voltage of a second winding of the power converter and to at least partially compensate for a change in a forward voltage of a rectifying diode associated with the second winding. - View Dependent Claims (13)
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14. A method for a power converter, the method comprising:
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generating a first signal based at least in part on an amplified signal, the amplified signal being related to a feedback signal of the power converter; generating a second signal based at least in part on the amplified signal; receiving a compensation signal and a third signal, the compensation signal being related to a combination of the first signal and the second signal; generating a modulation signal based at least in part on the compensation signal and the third signal; receiving the modulation signal; and generating a drive signal based at least in part on the modulation signal to affect a current flowing through a winding of the power converter. - View Dependent Claims (15)
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Specification