Local loop control system for a multiple output power converter
First Claim
1. For use with a power converter having a first output coupled to a first synchronous rectifier circuit and a second output coupled to a second synchronous rectifier circuit and a main controller configured to regulate a voltage proportional to a weighted sum of said first and second outputs, a local loop control system, comprising:
- a first output controller configured to regulate a voltage at said first output; and
a second output controller configured to regulate a voltage at said second output, one of said first and second output controllers configured to reduce a drive signal to a corresponding one of said first and second synchronous rectifier circuits when a corresponding voltage at one of said first and second outputs exceeds a voltage proportional to said weighted sum.
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Accused Products
Abstract
A local loop control system and method of operating the same for use with a power converter. The power converter includes a first output coupled to a first synchronous rectifier circuit and a second output coupled to a second synchronous rectifier circuit. The power converter employs a main controller configured to regulate a voltage proportional to a weighted sum of the first and go second outputs. In one embodiment, the local loop control system includes: (1) a first output controller configured to regulate a voltage at the first output and (2) a second output controller configured to regulate a voltage at the second output, one of the first and second output controllers configured to reduce a drive signal to a corresponding one of the first and second synchronous rectifier circuits when a corresponding voltage at one of the first and second outputs exceeds a voltage proportional to the weighted sum.
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Citations
21 Claims
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1. For use with a power converter having a first output coupled to a first synchronous rectifier circuit and a second output coupled to a second synchronous rectifier circuit and a main controller configured to regulate a voltage proportional to a weighted sum of said first and second outputs, a local loop control system, comprising:
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a first output controller configured to regulate a voltage at said first output; and
a second output controller configured to regulate a voltage at said second output, one of said first and second output controllers configured to reduce a drive signal to a corresponding one of said first and second synchronous rectifier circuits when a corresponding voltage at one of said first and second outputs exceeds a voltage proportional to said weighted sum. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a local loop control system for use with a power converter having a first output coupled to a first synchronous rectifier circuit and a second output coupled to a second synchronous rectifier circuit and a main controller configured to regulate a voltage proportional to a weighted sum of said first and second outputs, comprising:
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regulating a voltage at said first output with a first output controller; and
regulating a voltage at said second output with a second output controller, one of said first and second output controllers reducing a drive signal to a corresponding one of said first and second synchronous rectifier circuits when a corresponding voltage at one of said first and second outputs exceeds a voltage proportional to said weighted sum. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A power converter, comprising:
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a transformer having a primary winding and first and second secondary windings;
a primary power stage, coupled to said primary winding, associated with a main controller that controls a primary power switch to regulate a voltage proportional to a weighted sum of first and second outputs of said power converter;
a first secondary stage, coupled to said first secondary winding, including a first synchronous rectifier circuit coupled to a first output controller that regulates a voltage at said first output; and
a second secondary stage, coupled to said second secondary winding, including a second synchronous rectifier circuit coupled to a second output controller that regulates a voltage at said second output, one of said first and second output controllers reducing a drive signal to a corresponding one of said first and second synchronous rectifier circuits when a corresponding voltage at one of said first and second outputs exceeds a voltage proportional to said weighted sum. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification