US 12,316,221 B2
Selective stopband avoidance in switching converter controller
Puneet Sareen, Freising (DE); Michael Känner, Munich (DE); Christian Harder, Freising (DE); and Narayanan Seetharaman, Unterschliessheim (DE)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Sep. 28, 2023, as Appl. No. 18/374,325.
Application 18/374,325 is a continuation of application No. 17/537,802, filed on Nov. 30, 2021, granted, now 11,863,069.
Prior Publication US 2024/0022169 A1, Jan. 18, 2024
Int. Cl. H02M 3/157 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/157 (2013.01) [H02M 1/0041 (2021.05)] 16 Claims
OG exemplary drawing
 
1. A switching converter controller comprising:
a stopband controller having:
an oscillator configured to output a reference signal,
a frequency counter configured to:
receive the reference signal and a clock signal, and
output a frequency value for the clock signal,
a stopband controller input configured to receive the clock signal, and
a stopband controller output, wherein:
the stopband controller is configured to provide stopband information at the stopband controller output based on the frequency value for the clock signal; and
a pulse-frequency modulation (PFM) controller having a first PFM controller input, a second PFM controller input and a PFM controller output, the second PFM controller input coupled to the stopband controller output, and the PFM controller configured to adjust the clock signal at the PFM controller output based on the stopband information.