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AC-DC control chip and AC-DC flyback controller

A technology for controlling chips and controllers, applied in control/regulation systems, instruments, current collectors, etc.

Active Publication Date: 2021-01-29
SHENZHEN WINSEMI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an AC-DC control chip and a flyback controller to solve the problem that when the prior art USB PD fast charging source has multiple output voltages, the switching frequency of the system and the overload protection threshold of the system can be continuously smoothed during the output voltage change process change, no jump

Method used

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  • AC-DC control chip and AC-DC flyback controller
  • AC-DC control chip and AC-DC flyback controller
  • AC-DC control chip and AC-DC flyback controller

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. Terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention. The term "...

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Abstract

The invention provides an AC-DC control chip, and also provides an AC-DC flyback controller comprising the chip. The AC-DC control chip provided by the embodiment of the invention comprises a reset / set (RS) trigger, and a turn-on signal module, a turn-off signal module, an overload protection module and a driving module which are electrically connected with the RS trigger respectively, wherein theoutput end of the turn-on signal module is connected with an S-end pin of the RS trigger, the output end of the turn-off signal module is connected with an R-end pin of the RS trigger, and the inputend of the driving module is connected with a Q-end pin of the RS trigger; and the turn-on signal module is used for adjusting the control of the feedback voltage FB on the output frequency of the starting signal module according to the continuous change of the voltage value of the output voltage so as to realize the continuous smooth change of the output frequency.

Description

technical field [0001] The invention relates to the field of AC-DC switch control, in particular to an AC-DC control chip and an AC-DC flyback controller. Background technique [0002] In recent years, with the development of portable electronic products, USB PD fast charging sources have also developed. The existing USB PD fast charging sources are equipped with multi-level output voltage, so in the AC-DC control chip in the AC-DC flyback controller of the existing USB PD fast charging source, when the output load increases or decreases Hours, the output voltage will drop. When the op amp in the protocol chip in the AC-DC flyback controller detects that the output voltage is lower than the set value, it will reduce the current of the optocoupler, so that the input AC-DC control chip The feedback voltage FB rises, and the rise of the feedback voltage FB will cause a sudden rise in the output frequency of the oscillator in the AC-DC control chip, a rise in the CS threshold, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/335H02J7/06H02J7/00
CPCH02J7/06H02M3/33523H02M7/217H02J7/00304H02J7/007182
Inventor 许煌樟林思聪宋利军
Owner SHENZHEN WINSEMI MICROELECTRONICS
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