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A control circuit for a switching converter

A control circuit and converter technology, applied in control/regulation systems, output power conversion devices, instruments, etc., can solve problems such as poor transient response, complex loop compensation, frequency changes, etc., to achieve simple structure, transient Responsive effect

Active Publication Date: 2017-02-15
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Average current control technology and peak current control technology can enable switching converters to obtain accurate output voltage or output current, but the loop compensation is complex and the transient response is poor
The switching converter using COT control technology does not need a loop compensation network, which makes the circuit design simpler, but its frequency is easy to change with the input and output voltage or load current

Method used

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  • A control circuit for a switching converter
  • A control circuit for a switching converter
  • A control circuit for a switching converter

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Embodiment Construction

[0015] The specific embodiments described below represent exemplary embodiments of the invention and are merely illustrative rather than limiting in nature. In the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the term "in one embodiment" in various places in the specification are not all referring to the same embodiment, nor are they intended to mutually exclude other or alternative embodiments. All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0016] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Like reference numerals refer to like parts or features throughout the...

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PUM

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Abstract

A control circuit for a switching converter is disclosed, comprising: a turn-on signal generation circuit, a turn-off signal generation circuit, a logic circuit, a current sensing circuit and a turn-off threshold value generation circuit. The control circuit generates a switching signal equal to or greater than a set frequency to drive a power switch of the switching converter.

Description

technical field [0001] Embodiments of the present invention relate to electronic circuits, more particularly but not exclusively to a control circuit for a switching DC-DC converter. Background technique [0002] A DC-DC converter is an electronic device that accepts a DC input voltage and provides a DC output voltage to a load. DC-DC converters are generally configured to provide a regulated DC output voltage or current ("load voltage" or "load current") to a load based on some unregulated DC source voltage. For example in many automotive applications where a battery provides a DC power source with an unregulated voltage of approximately 12 volts, a DC-DC converter can be used to receive an unregulated 12 volts DC as a source voltage and provide a regulated DC output voltage Or current to drive various electronic circuits in the vehicle (instruments, accessories, engine controls, lighting, radio / stereo, etc.). The DC output voltage can be lower, higher or the same as the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/00
CPCH02M3/156H02M1/0009
Inventor 许力
Owner CHENGDU MONOLITHIC POWER SYST