Patent ID: 11895747
Assignee: JOULWATT TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. A bleeder circuit control method for controlling a bleeder circuit, wherein the bleeder circuit is electrically connected to a bus of a light-emitting diode (LED) driver circuit, and the method comprises:
receiving a bus voltage and at least one threshold voltage and generating a first time signal characterizing the time between the moment at which a rising edge of the bus voltage reaches the threshold voltage and the moment at which a falling edge of the bus voltage reaches the threshold voltage during each power frequency half-wave cycle;
starting from a second power frequency half-wave cycle, turning off the bleeder circuit for a second time when detecting that the rising edge of the bus voltage reaches the threshold voltage;
detecting the time between the moment at which the bleeder circuit is conducting again to the moment at which the falling edge of the bus voltage reaches the threshold voltage, and generating a third time signal; and
reconfiguring the second time in a next power frequency half-wave cycle based on the third time signal until the third time signal reaches a target value.