公开(公告)号：US11901833B2

公开(公告)日：2024-02-13

申请号：US17938055

申请日：2022-10-05

Applicant: CHROMA ATE INC.

Inventor： Cheng Chung Lee ,  Szu Chieh Su ,  Wen Chih Chen ,  Chih Hsing Lin ,  Jhen Wei Gong

IPC: H02M5/44 ,  H02M1/00

CPC classification number: H02M5/44 ,  H02M1/0009

Abstract: Systems and methods for switching between a power supply mode and an electronic load mode are disclosed. For switching from the power supply mode to the electronic load mode, the method comprises the steps of: deactivating a power element; activating a current control module and a phase-locked loop to obtain a voltage phase of a device under test; calculating a turn-on amount of the power element according to a current setting value and the voltage phase; and causing the power element to generate a load current for the device under test. For switching from the electronic load mode to the power supply mode, the method comprises the steps of: deactivating the power element; activating a voltage control module; calculating the turn-on amount of the power element according to a voltage setting value; and causing the power element to input a corresponding voltage to the device under test.

公开(公告)号：US12255532B2

公开(公告)日：2025-03-18

申请号：US18050060

申请日：2022-10-27

Applicant: CHROMA ATE INC.

Inventor： Chen Yuan Wu ,  Chih Hsien Wang ,  Kuo Cheng Wang ,  Cheng Chung Lee

IPC: H02M3/157 ,  H02M1/00 ,  H02M3/139 ,  H02M3/158

Abstract: A modular AC/DC power conversion module for power sources and loads and a method of driving the same is provided. When an AC/DC converter is electrically coupled to an external power source, a microprocessor is electrically energized by a buck auxiliary circuit, under control of the microprocessor, a DC/DC converter is activated for a certain time period, and then, the AC/DC converter is activated. Thereafter, an output voltage of the AC/DC converter is boosted, and an output voltage of the DC/DC converter is boosted accordingly. Power elements in the downstream side DC/DC converter are activated first, and then power elements in the upstream side AC/DC converter are activated, thereby an inrush current is suppressed. Once the external power source is connected, the buck auxiliary circuit will automatically reduce a voltage of the power input to activate the module. It realizes that the module will autonomously operate after being electrically energized.