Voltage conversion circuit and voltage conversion controller

A voltage conversion circuit and voltage conversion technology, applied in control/regulation systems, emergency protection circuit devices, output power conversion devices, etc., can solve problems such as not provided, and achieve the effects of simplifying production, saving costs, and saving usage

Inactive Publication Date: 2017-01-11
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the previous technology as an example above, the pin representing the feedback point does not provide a function that has substantial benefits for the circuit operation when the voltage conversion controller is in an unsteady state. This is the current integration of general voltage conversion controllers. common phenomenon in circuits

Method used

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  • Voltage conversion circuit and voltage conversion controller
  • Voltage conversion circuit and voltage conversion controller
  • Voltage conversion circuit and voltage conversion controller

Examples

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Embodiment Construction

[0054] In the description and the scope of subsequent patent applications, the term "coupling" here includes any direct and indirect electrical connection means. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means. Two devices.

[0055] figure 1 is a schematic circuit diagram of a voltage conversion circuit 100 . The voltage conversion circuit 100 is a configuration of a flyback switching power conversion circuit. The voltage conversion circuit 100 includes the voltage conversion controller 200 of the present invention and an application circuit. The application circuit includes an output terminal and a feedback terminal COMP. The output terminal has an output voltage and is coupled to a current load. The voltage conversion controller 200 furt...

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Abstract

The invention relates to a voltage switching circuit. The voltage switching circuit comprises an application circuit and a voltage switching controller. The application circuit comprises an output end, a feedback end and a feedback capacitor coupled to the feedback end. The output end comprises an output voltage and is coupled to a circuit load. The voltage switching controller comprises a feedback end stitch coupled to the feedback end. The voltage switching controller comprises a first mode and a second mode. In the first mode, the output end provides adjusted output voltage and provides current for the current load, and the feedback stitch receives a feedback signal. In the second mode, the output voltage will not be adjusted, and the feedback stitch provides a counting frequency signal with fixed periodicity which is determined by the capacitance of the capacitor.

Description

[0001] 【Technical field】 [0002] The present invention relates to a voltage conversion circuit, in particular to a voltage conversion circuit including a multi-functional single-pin voltage conversion controller. [0003] 【Background technique】 [0004] Please refer to US Patent No. US7,848,124. The voltage conversion controller is applied in a fly-back switching power converter. The flyback switching power converter is a kind of voltage conversion circuit configuration, and its purpose is to provide a stable output voltage. When the flyback switching power supply conversion circuit is in steady-state operation, the voltage conversion controller regulates its output voltage through negative feedback control to provide a stable and rated output voltage value and output The current is given to a current load. At this time, there is a signal on the feedback point IN3 on the negative feedback control path, which is a signal linearly related to the magnitude of its output curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/36H02M1/14H02H7/10
Inventor 林昆余纪志伟林梓诚
Owner RICHTEK TECH
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