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Multi-mode switching circuit and control method thereof

A conversion circuit, multi-mode technology, used in control/regulation systems, output power conversion devices, electrical components, etc.

Active Publication Date: 2015-03-25
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

in addition, figure 1 The boost conversion circuit 10 shown can only provide an output voltage VOUT higher than the input voltage VIN, how to further improve it so that it can provide an output voltage VOUT lower than the input voltage VIN is another problem faced by those skilled in the art

Method used

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  • Multi-mode switching circuit and control method thereof
  • Multi-mode switching circuit and control method thereof
  • Multi-mode switching circuit and control method thereof

Examples

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Embodiment Construction

[0017] 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.

[0018] 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

The invention discloses a multi-mode switching circuit which comprises an inductor, a first transistor, a second transistor and a third transistor. The inductor is coupled between the input end and the switching end. The first transistor is coupled between the switching end and the grounded end. The second transistor and the third transistor are coupled between the switching end and the output end in series. When a voltage converter is not enabled, the second transistor and the third transistor of the multi-mode switching circuit can effectively isolate input voltage from output voltage. After the voltage converter is enabled, the voltage converter can work in a voltage increasing mode and a voltage decreasing mode so that the output voltage with the larger range can be provided.

Description

technical field [0001] Embodiments of the present invention relate to electronic circuits, and more specifically but not exclusively to a switch-type multi-mode conversion circuit and a control method thereof. Background technique [0002] A switching converter circuit is a commonly used voltage conversion circuit generally configured to provide a regulated output voltage or current ("load voltage" or "load current") to a load based on some unregulated source voltage. [0003] figure 1 A schematic circuit diagram of an existing boost conversion circuit 10 is shown. The switch conversion circuit 100 includes a first inductor L1, a first transistor M1, a second transistor M2 and an output capacitor CO. The first inductor L1 is coupled between the input terminal IN and the switch terminal SW, the first transistor M1 is coupled between the ground terminal GND and the switch terminal SW, and the second transistor M2 is coupled between the switch terminal SW and the output termi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/1582H03K2017/066H03K2217/0018H02M3/1563
Inventor 李伊珂
Owner CHENGDU MONOLITHIC POWER SYST
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