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Switch converter, control circuit of switch converter and control method of switch converter

A technology of switching converters and control circuits, applied in control/regulation systems, converting DC power input to DC power output, instruments, etc., can solve problems such as adverse effects of switching converter transient response, and achieve improved transient response, Reduce the effect of overshoot

Active Publication Date: 2012-07-25
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the slope compensation signal VSLOPE with a high slope will adversely affect the transient response of the switching converter

Method used

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  • Switch converter, control circuit of switch converter and control method of switch converter
  • Switch converter, control circuit of switch converter and control method of switch converter
  • Switch converter, control circuit of switch converter and control method of switch converter

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0026] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in on...

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Abstract

The invention discloses a switch converter, a control circuit of the switch converter, and a control method of the switch converter. By conditioning ramp compensation signals according to the load condition, the overshoot degree of the output voltage of the switch converter is reduced during the instantaneous descending of load current while stable operation of the switch converter is maintained, and the transient response of the switch converter is improved.

Description

technical field [0001] Embodiments of the present invention relate to electronic circuits, and in particular to a switching converter and its control circuit and control method. Background technique [0002] Constant on-time control has been well applied in the field of power supplies due to its superior load transient response, simple internal structure and smooth operation mode switching. [0003] figure 1 is a block diagram of a conventional switching converter 100 using constant on-time control. The switching converter 100 includes a conduction time control unit 101 , a comparison unit 102 , a logic unit 103 and a switch circuit 104 . The switch circuit 104 includes at least one switch tube, and the input voltage VIN is converted into an output voltage VOUT by turning on and off of the at least one switch tube. The on-time control unit 101 generates an on-time control signal COT to control the on-time of one or more switches in the switch circuit 104 . The comparison...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCG05F1/10H02M3/156H02M3/1588H02M1/0025H02M3/1566Y02B70/10
Inventor 姜礼节吴小康欧阳茜罗苏华任远程
Owner CHENGDU MONOLITHIC POWER SYST
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