US 12,244,220 B2
Low frequency output ripple cancelation for a power supply
Eliseo Carcamo Olmos, Nuevo Leon (MX); Amin de la Cruz Oseguera, Nuevo Leon (MX); and Juan Antonio Aqui Tapia, Nuevo Leon (MX)
Assigned to ABL IP Holding LLC, Atlanta, GA (US)
Filed by ABL IP Holding LLC, Atlanta, GA (US)
Filed on Jan. 21, 2022, as Appl. No. 17/581,215.
Prior Publication US 2023/0238877 A1, Jul. 27, 2023
Int. Cl. H02M 1/14 (2006.01); H02M 1/00 (2007.01); H02M 1/42 (2007.01); H02M 3/00 (2006.01); H05B 45/37 (2020.01)
CPC H02M 1/143 (2013.01) [H02M 1/0095 (2021.05); H02M 1/4225 (2013.01); H02M 3/015 (2021.05); H05B 45/37 (2020.01); H02M 1/008 (2021.05)] 20 Claims
OG exemplary drawing
 
8. A power supply, comprising:
a direct current-direct current (DC-DC) converter; and
a processor configured to control the DC-DC converter, wherein the processor is configured to:
sense an alternating current (AC) input voltage sine waveform;
determine a correction factor for a switching frequency of the power supply based on the sensed AC input voltage; and
apply the correction factor to the switching frequency of the power supply to modify the switching frequency of the power supply,
wherein a modification of the switching frequency synchronizes the switching frequency of the power supply to the AC input voltage sine waveform.