US 12,341,433 B2
Power supply device with high output stability
Tzu-Tseng Chan, New Taipei (TW)
Assigned to ACER INCORPORATED, New Taipei (TW)
Filed by Acer Incorporated, New Taipei (TW)
Filed on May 4, 2023, as Appl. No. 18/311,997.
Claims priority of application No. 112106407 (TW), filed on Feb. 22, 2023.
Prior Publication US 2024/0283366 A1, Aug. 22, 2024
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 3/33576 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0019 (2021.05); H02M 1/4225 (2013.01); H02M 1/4241 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A power supply device with high output stability, comprising:
a bridge rectifier, generating a rectified voltage according to a first input voltage and a second input voltage;
a first capacitor, storing the rectified voltage;
a first voltage divider circuit, generating a first divided voltage according to the rectified voltage;
a boost inductor, receiving the rectified voltage;
a power switch element, selectively coupling the boost inductor to a ground voltage according to a first driving voltage;
a first output stage circuit, coupled to the boost inductor, and generating a median voltage;
a second voltage divider circuit, generating a second divided voltage according to the median voltage;
a switch circuit, generating a switching voltage according to the median voltage, a second driving voltage, and a third driving voltage;
a transformer, comprising a main coil, a first secondary coil, and a second secondary coil, wherein a leakage inductor and a magnetizing inductor are built in the transformer, and the main coil receives the switching voltage through the leakage inductor;
a resonant capacitor, coupled to the magnetizing inductor;
a second output stage circuit, coupled to the first secondary coil and the second secondary coil, and generating an output voltage; and
a detection and control circuit, generating the first driving voltage, the second driving voltage, and the third driving voltage according to the first divided voltage, the second divided voltage, and the output voltage.