Soft-off control module, reference signal generation unit, power converter and related control method

A technology of power converter and control module, which is applied in the direction of converting DC power input to DC power output, output power conversion device, electrical components, etc., and can solve problems such as burnout, shutdown failure, and increase

Active Publication Date: 2016-09-21
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The input voltage is likely to increase to exceed the allowable safe operating voltage of the power converter and burn it out, shutting down failure

Method used

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  • Soft-off control module, reference signal generation unit, power converter and related control method
  • Soft-off control module, reference signal generation unit, power converter and related control method
  • Soft-off control module, reference signal generation unit, power converter and related control method

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Embodiment Construction

[0022] Some embodiments of the present disclosure will be described in detail below. In the following description, some specific details, such as specific circuit structures in the embodiments and specific parameters of these circuit elements, are used to provide a better understanding of the embodiments of the present disclosure. Those skilled in the art can understand that the embodiments of the present disclosure can be implemented even in the absence of some details or the combination of other methods, elements, materials, and the like.

[0023] In the specification of the present disclosure, when referring to "one embodiment", it means that the specific features, structures or parameters, steps, etc. described in the embodiment are included in at least one embodiment according to the present disclosure. Therefore, in the specification of the present disclosure, if terms such as "according to an embodiment of the present disclosure" and "in an embodiment" are used, they are n...

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Abstract

A power converter, a soft-off control module suitable for the power converter, a variable reference signal generation unit and a control method are proposed. A power converter is used to convert an input voltage to an output voltage. The variable reference signal generating unit provides the variable reference signal for the power converter. The soft turn-off control module is used to control the turn-off process of the power converter, and determine whether the input voltage exceeds the threshold signal during the turn-off process, and if it exceeds, the soft turn-off control module controls the variable reference signal to increase , if not exceeded, the soft-off control module controls the variable reference signal to decrease. During the shutdown process of the power converter, the output voltage is adjusted to change in the same direction as the variable reference signal based on the variable reference signal and the voltage feedback signal representing the output voltage. Therefore, the power converter of the present disclosure can avoid overvoltage of the input voltage during the shutdown process, so that the shutdown process can be completed smoothly and safely.

Description

Technical field [0001] The embodiments of the present disclosure relate to power converters, and more particularly to switching power converters, soft turn-off control circuits and related control methods. Background technique [0002] Power converters, such as switching power converters, have been widely used in various industrial electronic equipment and consumer electronic equipment. Taking a step-down switching power converter as an example, it is often used in occasions where the input voltage needs to be adjusted to a stable lower output voltage. [0003] Generally, a switching power converter includes a control circuit for controlling the on and off switching of the switching unit to convert the input voltage into a suitable output voltage. When the switching power converter is just powered off, it generally needs to go through a shutdown process to gradually reduce the output voltage from its steady-state expected value to the reference ground potential based on the contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M1/00
CPCH02M1/36H02M3/156H02M1/0025
Inventor 李伊珂杨向一
Owner CHENGDU MONOLITHIC POWER SYST
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