Voltage converter capable of suppressing output voltage overshooting

A technology for voltage converters and output voltages, which is applied in the direction of output power conversion devices, conversion equipment without intermediate conversion to AC, electrical components, etc., and can solve problems such as load component damage and overshoot

Active Publication Date: 2014-01-22
ELITE SEMICON MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

refer to figure 2 , at the initial stage of system startup (tSTART ), due to the output voltage V E Cannot reach a stable voltage level quickly, so there will be a considerable inductor current I during power-on L , and the output voltage V OUT There will be overshoot
This overshoot voltage may cause damage to the load element

Method used

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  • Voltage converter capable of suppressing output voltage overshooting
  • Voltage converter capable of suppressing output voltage overshooting
  • Voltage converter capable of suppressing output voltage overshooting

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Embodiment Construction

[0028] The subject matter of the present invention is a voltage converter for suppressing output voltage overshoot conditions. In order to have a thorough understanding of the present invention, detailed steps and structures will be presented in the following description. It is evident that the practice of the invention is not limited to specific details familiar to those skilled in the art. In other instances, well-known structures or steps are not described in detail in order to avoid unnecessarily limiting the invention. The preferred embodiments of the present invention will be described in detail as follows, but in addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and the scope of the present invention is not limited, it is subject to the above patent scope .

[0029] image 3 A schematic diagram of the structure of the voltage converter 30 for suppressing output voltage overshoot according to an embodim...

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PUM

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Abstract

The invention discloses a voltage converter capable of suppressing output voltage overshooting. The voltage converter is used for receiving an input voltage and adjusting the input voltage to generate an output voltage. In one embodiment of the invention, the voltage converter comprises an error amplifier, a compensation network and a selection circuit. The error amplifier has a positive-phase input end used for receiving a reference voltage, a reverse-phase input end used for receiving a feedback voltage associated with the output voltage, and an output end used for providing an error voltage. The compensation network is used for compensating the stability of the error amplifier. The selection circuit is used for selectively connecting the compensation network to the output end of the error amplifier according to the voltage level of the error voltage. In operation, when the voltage level of the feedback voltage is smaller than the voltage level of the reference voltage, the compensation network is not connected to the output end of the error amplifier; and when the voltage level of the feedback voltage is substantially equal to the voltage level of the reference voltage, the compensation network is connected to the output end of the error amplifier.

Description

technical field [0001] The present invention relates to a voltage converter that suppresses an output voltage overshoot condition. Background technique [0002] A DC-to-DC voltage converter can be used to regulate an input voltage into a stable output voltage, so as to supply the current required by the load. Generally speaking, DC-to-DC voltage converters are divided into boost converters, buck converters and buck-boost converters according to the magnitude of the input voltage and output voltage. (buck-boost converter). figure 1 A schematic structural diagram of a typical boost voltage converter 10 is shown. refer to figure 1 , the boost voltage converter 10 includes an input capacitor C IN , an inductor L, two switches SW 1 and SW 2 , an output capacitor C OUT And a control circuit 12 . The control circuit 12 is used to provide and control the two switches SW 1 and SW 2 The two drive signals D 1 and D 2 , so that the switch SW 1 and SW 2 can be turned on and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02M1/32
Inventor 游东明
Owner ELITE SEMICON MEMORY TECH INC
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