Current source with indirect load current signal extraction
First Claim
Patent Images
1. A switching circuit for supplying an output current to a load, comprising:
- a switching element,an inductive element coupled to the switching element, anda load current extraction circuit responsive to current in the inductive element for producing a load current signal as a simulated current approximating current in the load.
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Accused Products
Abstract
A switching circuit for supplying current to a load has a switching element, an inductive element coupled to the switching element, and a load current extraction circuit responsive to current in the inductive element for producing a load current signal as a simulated current approximating current in the load.
93 Citations
20 Claims
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1. A switching circuit for supplying an output current to a load, comprising:
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a switching element, an inductive element coupled to the switching element, and a load current extraction circuit responsive to current in the inductive element for producing a load current signal as a simulated current approximating current in the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for driving a LED, comprising:
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a switching regulator for producing an output current supplied to the LED, the switching regulator including an inductive element and an output capacitor, and a current sensing circuit responsive to current in the inductive element to produce a load current signal for controlling the output current, the current sensing circuit is configured to process the current in the inductive element so as to produce the load current signal as a simulated current approximating current in the LED. - View Dependent Claims (15, 16)
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17. A method of controlling a switching circuit having an inductive element, the method comprising the steps of:
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sensing current in the inductive element, and processing the sensed current so as to produce a load current signal as a simulated current approximating current in a load of the switching circuit. - View Dependent Claims (18, 19, 20)
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Specification