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A power converter control circuit with a deep burst mode

A technology of power converter and control circuit, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, control/regulation system, etc.

Active Publication Date: 2013-03-13
SYST GEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The load detection circuit generates a switching control signal according to a feedback signal

Method used

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  • A power converter control circuit with a deep burst mode
  • A power converter control circuit with a deep burst mode
  • A power converter control circuit with a deep burst mode

Examples

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Embodiment Construction

[0055] In order to make the structural features of the present invention and the achieved effects have a further understanding and recognition, preferred embodiments and detailed descriptions are specially used, which are described as follows:

[0056] figure 2 is a circuit diagram of an embodiment of a power converter of the present invention. A control circuit 40 has an output terminal OUT, a sensing terminal CS, a feedback terminal FB and a ground terminal GND. The ground terminal GND is coupled to a ground. The control circuit 40 is based on a feedback signal V FB Output a switching signal V G , while adjusting an output of the power converter (output voltage V O and / or output current). Feedback signal V FB Associated with the load status of the power converter. Feedback signal V FB Generated at the feedback terminal FB of the control circuit 40 . switching signal V G driving a power transistor Q coupled to a power transformer 10 1 , used to switch the power tr...

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Abstract

The invention provides a power converter control circuit with a deep burst mode. The control circuit comprises a load detection circuit and a pulse wave width regulating circuit. The load detection circuit generates a switching control signal according to a feedback signal which is associated with a load state of a power converter. The pulse wave width regulating circuit generates a switching signal according to the switching control signal and the feedback signal and adjusts an output of the power converter. When the load state of the power converter is an extremely light load state, the control circuit executes the deep burst mode and switches the switching signal for only once in every deep burst cycle. Therefore, switching loss is reduced and power consumption of the power converter is reduced similarly.

Description

technical field [0001] The present invention relates to a control circuit, in particular to a control circuit with a deep burst mode for a power converter. Background technique [0002] Various power converters have been widely used to provide regulated voltage and current to various electronic products. Under the restriction of environmental pollution, power converters have been required to meet the standards of power management and energy conservation. The principle of power management is to manage the power consumption of the system during operation. Further, only a small amount of power will be consumed during non-operational periods. Regarding power converters, in terms of power management applications, power saving under light load conditions is a major requirement today. [0003] Generally, a control circuit of the power converter generates a switching signal according to a feedback signal. The feedback signal is related to a load status of the power converter. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/08H02M3/335
CPCH02M3/33507H02M1/00H02M2001/0035H02M1/08H02M3/335Y02B70/126H02M1/0035Y02B70/10
Inventor 钟启晨黄伟轩
Owner SYST GEN
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