LOW COST POWER SUPPLY CIRCUIT AND METHOD
First Claim
1. A power supply circuit for supplying a stable DC current output, the power supply circuit comprising:
- an LLC converter stage for converting a DC voltage input into a DC voltage output,the power supply circuit further comprising;
at least one hysteretic converter stage having a DC voltage input coupled to the DC voltage output of the LLC converter stage, and having a DC current output, andwherein the LLC converter stage lacks a feedback control.
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Accused Products
Abstract
A power supply circuit has an LLC converter stage for converting a DC voltage input into a DC voltage output, and at least one hysteretic converter stage. Each hysteretic converter stage has a DC voltage input coupled to the DC voltage output of the LLC converter stage, and a DC current output. The LLC converter stage lacks a feedback control, and is operated at its load independent point. A ripple on the DC voltage output of the LLC converter does not affect the output current of the hysteretic converter stage. The stable DC current output of the hysteretic converter stage is coupled to a load having one or more LED strings.
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Citations
9 Claims
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1. A power supply circuit for supplying a stable DC current output, the power supply circuit comprising:
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an LLC converter stage for converting a DC voltage input into a DC voltage output, the power supply circuit further comprising; at least one hysteretic converter stage having a DC voltage input coupled to the DC voltage output of the LLC converter stage, and having a DC current output, and wherein the LLC converter stage lacks a feedback control. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of supplying a stable DC current to at least one load, the method comprising:
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converting a DC voltage input into a DC voltage output by an LLC converter stage operated at a predetermined frequency; converting the DC voltage output of the LLC converter stage into at least one DC current output by at least one hysteretic converter stage; and supplying the at least one DC current output to the at least one load. - View Dependent Claims (9)
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Specification