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A primary-side output current estimator with process compensator for the flyback control circuits is designed and analyzed in this investigation. Flyback control circuits play a key role of smart lighting systems, where LED drivers require a compensator to keep the system stable. The process sensor is in charge of the detection of the chip process corner. Then, the process compensator correspondingly...
A flyback control circuit with a primary side output current estimator is designed on chip and analyzed in this investigation. The flyback control circuit plays a key role of lighting systems, where the LED current estimator and the diode conduction period detector are proposed for the accuracy of LED driver control. The LED current estimator generates a voltage proportional to the LED current. The...
This paper presents a primary-side control structure for operating high-brightness LED (HB-LED) strings under the constant power drive technique. To this end, an inner-outer-loop control structure is presented by utilizing an ac-dc flyback converter connected to an LED string. The proposed control structure regulates the LED power along with input current control. The input voltage and the duty cycle...
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