Patent ID: 9735673
Date: 2017-08-15
CPC Classifications: H02M,Y02B

Claim:
1. A method for driving a switching element in a switching converter providing an output voltage, the method comprising: generating, in a control loop, a feedback signal that is dependent on the output voltage; driving the switching element in a plurality of subsequent burst cycles, each burst cycle comprising a burst-on period and a subsequent burst-off period, wherein the switching element is switched on and off at least two times to produce two pulses at a switching frequency during the burst-on period and is off during the burst-off period; determining a burst frequency, wherein determining the burst frequency comprises evaluating a duration of at least one burst cycle; adjusting an effective switching frequency in at least one burst cycle dependent on the determined burst frequency; generating the feedback signal using a gain of the control loop; varying the gain of the control loop dependent on the determined burst frequency; reducing the effective switching frequency until the burst frequency is below a first threshold; and reducing the gain of the control loop until the burst frequency is below a second threshold that is lower than the first threshold.