Control circuit and switch type converter with same

A technology for controlling circuits and switches, applied in the direction of output power conversion devices, electrical components, etc., which can solve the problems of unfavorable system miniaturization, increased power density, and large occupied area

Active Publication Date: 2015-06-24
NANJING SILERGY SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for this switching converter, the dynamically generated expected voltage may be greater than the voltage limiting threshold of the circuit, and the overvoltage protection circuit cannot be used for voltage limiting at this time
[0003] The existing multi-loop feedback circuit for voltage limiting includes two feedback loops, and the compensation circuit of each loop requires a separate compensation capacitor and compensation resistor, and the capacitance and resistance elements occupy a large area in the integrated circuit. Therefore, it is not conducive to the miniaturization of the system and the improvement of power density

Method used

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  • Control circuit and switch type converter with same
  • Control circuit and switch type converter with same
  • Control circuit and switch type converter with same

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Embodiment Construction

[0039] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0040] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0041] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses a control circuit and a switch type converter with the same. According to the control circuit, a plurality of feedback branches share the same compensation circuit, the feedback branches apply feedback adjusting compensation signals to the compensation circuit through one-way adjusting currents, and therefore needed independent compensation capacitors and compensation resistors can be reduced, the size of the control circuit can be reduced, and the power density can be improved.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a control circuit and a switching converter using the same. Background technique [0002] In switching converters, the output voltage of the switching converter can be limited based on multi-loop feedback. This voltage limiting method can be applied to the situation where the overvoltage protection circuit cannot be used to limit the voltage, especially the situation where the reference voltage representing the expected output voltage will change. For example, in a non-contact power supply system, a switch-type converter can be set in front of the inverter circuit, so that the input voltage of the resonant and magnetic coupling circuit of the resonant non-contact power supply device can be adjusted. The voltage can make the impedance matching not limited by the load impedance. However, for the switching converter, the dynamically generated expected voltage may be greater than the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08
CPCH02M1/00H02M1/0016
Inventor 邓甫华
Owner NANJING SILERGY SEMICON TECH CO LTD
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