POWER REGULATION OF LED BY MEANS OF AN AVERAGE VALUE OF THE LED CURRENT AND BIDIRECTIONAL COUNTER
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Abstract
A circuit for the power regulation of an LED comprises a converter having a switch. The LED is interconnected in an output circuit, wherein a control unit controls the magnetization of an inductor, in that it actively clocks the switch. A measured actual value representative of the average value of the LED current is returned to the control unit and compared to a reference value.
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Citations
70 Claims
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1-35. -35. (canceled)
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36. A method for regulation of an LED of an output circuit by a converter having a switch, the method comprising:
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actively clocking the switch to magnetize an inductance in an inductor; measuring an actual value representative of an average value of the LED current (ILED) for use as a feedback variable for the regulation of the LED; comparing the actual value with a reference value (IAVG — DESIRED); and
regulating the LED based on the comparison. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A circuit for the power regulation of a light emitting diode (LED), the circuit comprising:
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a converter having a switch; an LED interconnected at an output of the circuit; a control unit to control magnetization of an inductance by actively clocking the switch; wherein a measured actual value representative of an average value of the LED current is fed back to the control unit, said actual value being compared with a reference value. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70)
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Specification