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switching power supply circuit

A switching power supply circuit, power switch technology, applied in the field of circuits, can solve problems such as battery charging time increase

Active Publication Date: 2021-02-26
ON BRIGHT ELECTRONICS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as battery capacity increases, battery charge times increase significantly, which is undesirable for most users of portable devices

Method used

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Embodiment Construction

[0016] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

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Abstract

Disclosed is a switching power supply circuit, comprising a first transformer and a second transformer, a first pulse width modulation control chip located on the secondary side of the first transformer, and a second pulse width modulation control chip located on the primary side of the first transformer , and a first power switch connected between the primary winding of the first transformer and the reference ground, wherein: the electric energy provided by the AC power supply is transmitted from the circuit input terminal of the switching power supply circuit to the circuit output terminal through the first transformer; the first pulse The width modulation control chip transmits a pulse width modulation control signal for controlling the on and off of the first power switch to the second pulse width modulation control chip via the second transformer; the second pulse width modulation control chip is based on The pulse width modulation control signal of the control chip is modulated to control the turn-on and turn-off of the first power switch.

Description

technical field [0001] The invention relates to the field of circuits, and more specifically relates to a switching power supply circuit. Background technique [0002] In recent years, as the screens and processors of portable devices such as smart phones, tablet computers, and notebook computers become larger, the battery capacity of the portable devices needs to be increased to maintain or extend the use time of the portable devices. However, as the battery capacity increases, the battery charging time increases significantly, which is undesirable for most users of portable devices. [0003] In order to keep the battery charging time constant or shorten the battery charging time, it is necessary to increase the output power of the charger and adapter. Such as the fast charging protocol proposed by Qualcomm, Huawei Technologies, and China Taiwan MediaTek, as well as power output voltage regulation protocols such as PD2.0 and PD3.0 protocols, have emerged with the emergence...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33592
Inventor 张允超张秀红张昌山
Owner ON BRIGHT ELECTRONICS SHANGHAI