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Switching converter and control circuit thereof

A switching converter and control circuit technology, applied in the field of electronics, can solve the problems of reducing the efficiency of switching converters, unable to realize ultra-low power switching converters, etc. Effect

Pending Publication Date: 2022-03-29
SG MICRO
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  • Abstract
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Problems solved by technology

However, the switching converter 100 of the prior art requires the reference voltage source 110 and the resistor feedback network to be kept on at all times under light load conditions to ensure the stability of the DC output voltage Vout, so the static losses of these two parts are not reduced, and the The efficiency of the entire switching converter under light load conditions cannot achieve ultra-low power switching converters

Method used

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  • Switching converter and control circuit thereof
  • Switching converter and control circuit thereof
  • Switching converter and control circuit thereof

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Embodiment Construction

[0024] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale.

[0025] It should be understood that in the following description, "circuitry" may include single or multiple combined hardware circuits, programmable circuits, state machine circuits and / or elements capable of storing instructions for execution by programmable circuits. When an element or circuit is said to be "connected to" another element or an element / circuit is said to be "connected between" two nodes, it can be directly coupled or connected to the other element or there can be intervening elements and the connection between elements can be be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled to" or...

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Abstract

The invention discloses a switching converter and a control circuit thereof. The control circuit comprises a first error amplifier, a logic and driving circuit and a reference voltage generating circuit. The reference voltage generating circuit performs intermittent sampling and holding according to the DC input voltage to generate the reference voltage, the reference voltage generating circuit is only started for a period of time in each clock period, and the stability of the reference voltage is maintained through the holding stage in the remaining time of the clock period, so that the stability of the DC output voltage is ensured, and the stability of the DC output voltage is ensured. And extremely low static power consumption can be realized, the efficiency of the switching converter in a light load state is improved, and the switching converter with ultra-low power consumption is realized.

Description

technical field [0001] The present invention relates to the field of electronic technology, and more specifically, to a switching converter and a control circuit thereof. Background technique [0002] With the demand for power electronic products and the development of semiconductor technology, power management chips are more widely used in portable computers, mobile phones, personal digital assistants and other portable or non-portable electronic devices. Switching converters in switching power supplies are widely used because of their advantages such as high conversion efficiency, large output current, small quiescent current, and wide output load range. In portable equipment, the efficiency of the switching converter under light load largely determines the standby event of the portable product system. Therefore, in recent years, the design of switching converters with low power consumption and high efficiency has become one of the research hotspots of portable devices. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088H02M3/158
CPCH02M1/088H02M3/158
Inventor 肖飞于翔
Owner SG MICRO
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