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Switching Power Converter and Flyback Control Method

A switching power supply, flyback control technology, applied in the direction of high-efficiency power electronic conversion, control/regulation systems, output power conversion devices, etc.

Active Publication Date: 2019-04-09
DIALOG SEMICONDUCTOR GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this low threshold increases the likelihood that the response to noise

Method used

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  • Switching Power Converter and Flyback Control Method
  • Switching Power Converter and Flyback Control Method
  • Switching Power Converter and Flyback Control Method

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Embodiment Construction

[0018] To address the need in the art for an improved activity signal detection structure, a flyback converter is provided that uses an adaptive threshold to detect an activity signal generated by a secondary side activity detector. The activity detector activates an activity signal in response to the application of a load or the occurrence of a fault condition after a blanking period following the last power switching cycle before the power switching cycle begins to sleep. In this way, the blanking period can be reduced since the controller uses a relatively high threshold immediately after the blanking period expires. In the event that no false detection of an active signal occurs due to continued oscillation, the auxiliary winding voltage may continue to oscillate due to the relative strength of the threshold at that time. In contrast, the detection of an active signal using a fixed threshold will require a longer blanking period. Although the blanking period is reduced, b...

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Abstract

The invention relates to an adaptive reference voltage of a switch power converter. A switching power converter is provided that detects an activity signal generated in response to load activity using an adaptively reduced threshold.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 62 / 089,146, filed December 8, 2014, the contents of which are incorporated herein in their entirety. technical field [0003] The present application relates to switching power converters, and more particularly to switching power converters configured for an adaptive reference voltage. Background technique [0004] The explosive growth of mobile electronic devices such as smartphones and tablet computers has created an increased technical demand for compact and efficient switching power converters to allow users to charge these devices. A flyback switching power converter is often provided with mobile equipment because its transformer provides safe isolation from AC household current. This isolation introduces a problem where the power switch appears on the primary side of the transformer while the load is on the secondary side. Power switch modulation of a flyback con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33576H02M1/0032Y02B70/10H02M3/335H02M3/33546
Inventor P·孔H·布伊D·多恩F·史J·沙
Owner DIALOG SEMICONDUCTOR GMBH