US 12,470,147 B2
Two-stage power supply with second parallel coupled inductor for dynamic noise suppression
Tzu-Tseng Chan, New Taipei (TW)
Assigned to Acer Incorporated, New Taipei (TW)
Filed by Acer Incorporated, New Taipei (TW)
Filed on Mar. 22, 2023, as Appl. No. 18/187,685.
Claims priority of application No. 111111540 (TW), filed on Mar. 28, 2022.
Prior Publication US 2023/0308024 A1, Sep. 28, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2007.01); H02M 3/00 (2006.01)
CPC H02M 3/33569 (2013.01) [H02M 1/0058 (2021.05); H02M 1/007 (2021.05); H02M 3/01 (2021.05)] 10 Claims
OG exemplary drawing
 
1. A power supply, comprising:
a boost circuit, comprising a boost inductor and a power switch, and configured to operate in response to switching of the power switch to boost a rectified power supply and generate a boosted power supply; and
an LLC converter, coupled to the boost circuit, comprising a first inductor, a first switch, and a second switch, and configured to control the first switch and the second switch according to a zero-voltage switching rule to convert the boosted power supply to an output power supply,
wherein the first inductor is inductively coupled with the boost inductor to obtain a first energy, and
in response to the first energy, a time point when a first terminal of the first switch and a second terminal of the first switch have zero voltage difference is delayed, such that a turn-on time point of the second switch lags behind a turn-on time point of the power switch.