公开(公告)号：US20250023441A1

公开(公告)日：2025-01-16

申请号：US18388195

申请日：2023-11-09

Applicant: ACBEL POLYTECH INC.

Inventor： Bing-Kun LAI ,  Cheng-Hsiao LUO ,  I-Hsiu LO

IPC: H02M1/00 ,  H02M1/42

Abstract: A current sampling circuit for a bridgeless power factor corrector is provided. The current sampling circuit comprises a sampling resistor, a first and second current sampling modules. In the first and second current sampling modules, primary windings of transformers are respectively serially connected to a first and second fast switches of the bridgeless power factor corrector. In a positive half cycle of the AC power, a second sampled current phase switching unit is turned on to form a second sampling circuit, and a first main current freewheeling unit is turned on to form a freewheeling path of a first transformer. In a negative half cycle of the AC power, a first sampled current phase switching unit is turned on to form a first sampling circuit, and a second main current freewheeling unit is turned on to form a freewheeling path of a second transformer.

公开(公告)号：US20250023440A1

公开(公告)日：2025-01-16

申请号：US18388197

申请日：2023-11-09

Applicant: ACBEL POLYTECH INC.

Inventor： Cheng-Hsiao LUO ,  I-Hsiu LO

IPC: H02M1/00 ,  H02M1/088 ,  H02M3/335

Abstract: A power supply having ORing MOSFETs mounts a voltage regulating unit between a main power module and an auxiliary power module of a secondary side of the power supply. The voltage regulating unit regulates a control voltage received by a driving unit, such that a voltage difference between a gate voltage and a source voltage of one of the ORing MOSFETs can be less than a rated voltage threshold for avoiding damaging the one ORing MOSFET.

公开(公告)号：US20170207713A1

公开(公告)日：2017-07-20

申请号：US15236759

申请日：2016-08-15

Applicant: ACBEL POLYTECH INC.

Inventor： Cheng-Hsiao LUO ,  Wei-Liang LIN

IPC: H02M3/335 ,  H02M1/42 ,  H02M1/15

CPC classification number: H02M3/33546 ,  H02M1/15 ,  H02M1/4208 ,  H02M3/33507 ,  Y02B70/126

Abstract: A feed forward controlling circuit and a method for voltage ripple restraint are provided. The feed forward controlling circuit is used to perform the feed forward controlling method. The feed forward controlling method is used to restrain ripple of the output voltage in a power converter. The power converter is controlled by a control signal outputted from an output terminal of a controller. The method includes steps of: receiving an output voltage from an output terminal of a voltage converter; attenuating the output voltage to generate an electrical signal; acquiring a DC signal from the electrical signal; and obtaining a ripple compensation signal in accordance with the electrical signal and the DC signal to output to an output terminal of a controller. The output terminal of the controller outputs a control signal to control the power converter.