Unpowered tuning interface circuit for an LED driver
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United States of America Patent
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-
Mar 6, 2018
Issued Date -
N/A
app pub date -
Jun 29, 2017
filing date -
Jul 12, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An LED driver circuit capable of being tuned via an unpowered tuning process and associated methods are provided. A radio frequency (RF) coupling circuit receives an RF tuning signal having a plurality of cycles of an RF carrier. The RF coupling circuit outputs a coupled RF tuning signal to a direct current (DC) generator circuit which rectifies the coupled RF tuning signal and outputs a rectified RF tuning voltage. A RF demodulation circuit receives the rectified RF tuning signal and selectively converts each burst of the rectified RF tuning signal to a single DC pulse. The RF demodulation circuit includes a Zener diode limiting the emitted voltage from the RF demodulation circuit. The microcontroller receives the output of the RF demodulation circuit, receives the regulated voltage, and controls one or more tuning operations of the LED driver circuit.
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