Acer has filed a patent for a power supply device that aims to reduce noise. The device includes bridge rectifiers, a coupling inductive element, power switch elements, output stage circuits, a switch circuit, a transformer, and an auxiliary control circuit. The patent claims that the device can effectively suppress noise and generate an output voltage. GlobalData’s report on Acer gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Acer, device power optimization was a key innovation area identified from patents. Acer's grant share as of September 2023 was 62%. Grant share is based on the ratio of number of grants to total number of patents.

A power supply device for reducing noise

Source: United States Patent and Trademark Office (USPTO). Credit: Acer Inc

A recently filed patent (Publication Number: US20230318466A1) describes a power supply device designed to reduce noise. The device includes a first bridge rectifier that generates a rectified voltage based on two input voltages, as well as a second bridge rectifier that generates another rectified voltage using the same input voltages. These rectified voltages are then received by a coupling inductive element.

The device also includes a first power switch element that selectively connects the coupling inductive element to a ground voltage based on a clock voltage. A first output stage circuit is coupled to the coupling inductive element and generates an internal voltage. A switch circuit receives the internal voltage and generates a switch voltage and a control voltage.

A transformer is included in the device and consists of a main coil, a first secondary coil, and a second secondary coil. The transformer also contains a leakage inductor and a magnetizing inductor. A resonant capacitor is coupled to the magnetizing inductor. A second output stage circuit is coupled to the first and second secondary coils and generates an output voltage.

An auxiliary control circuit generates the clock voltage and includes a second power switch element that is selectively enabled or disabled based on the control voltage. The patent also describes various components and configurations of the first and second bridge rectifiers, the coupling inductive element, the first power switch element, the first output stage circuit, the switch circuit, the transformer, the resonant capacitor, the second output stage circuit, and the auxiliary control circuit.

In summary, the patent describes a power supply device that aims to reduce noise. It achieves this through the use of multiple rectifiers, inductive elements, power switch elements, output stage circuits, and a transformer. The device also includes an auxiliary control circuit that generates a clock voltage and controls the operation of a second power switch element. The patent provides detailed descriptions of the various components and their configurations within the power supply device.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.