Patent ID: 11863069
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A switching converter controller comprising:
a stopband controller having a stopband controller input and a stopband controller output, the stopband controller input is configured to receive a reference signal, and the stopband controller is configured to:
store a programmable number of predetermined stopbands;
compare a frequency value determined from the reference signal to the programmable number of predetermined stopbands; and
output a stopband detected signal to the stopband controller output responsive to the frequency value being within one of the programmable number of predetermined stopbands;

a pulse-frequency modulation (PFM) controller having a first PFM controller input, a second PFM controller input and a PFM controller output, the first PFM controller input configured to receive a feedback error signal, the second PFM controller input coupled to the stopband controller output, and the PFM controller configured to selectively adjust a clock signal at the PFM controller output based on the feedback error signal and the stopband detected signal; and
a driver circuit having a driver circuit input and a driver circuit output, the driver circuit input coupled to the PFM controller output and configured to receive the clock signal, and the driver circuit output adapted to be coupled to a power stage switch.