SYSTEM CONTROL UNIT, LED DRIVER INCLUDING THE SYSTEM CONTROL UNIT, AND METHOD OF CONTROLLING STATIC CURRENT OF THE LED DRIVER
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United States of America Patent
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Issued Date -
Apr 24, 2014
app pub date -
Sep 17, 2013
filing date -
Sep 20, 2012
priority date (Note) -
Abandoned
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Abstract
Embodiments of the present invention provide a light-emitting diode (LED) driver and method of controlling the static current of the LED driver. In some embodiments, the LED driver is configured to calculate output currents of a pulse form using a small number of parameters and adjust a gate control signal using the mean value of the output currents of a pulse form. Accordingly, the LED driver can be used to control a static current that flows through an LED array connected to a circuit on the secondary side of a transformer using a DC voltage or an AC voltage supplied to the primary side of the transformer. In some embodiments, the LED driver includes a power conversion unit, switching unit, transformer, zero current detection unit, and system control unit. In some embodiments, the system control unit is configured to adjust the gate control signal.
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