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Voltage conversion device with soft startup function

A technology of voltage conversion and soft start circuit, which is applied in the direction of output power conversion devices, electrical components, and adjustment of electrical variables, etc. It can solve problems such as electromagnetic interference, burning circuit components, and affecting the normal operation of peripheral circuits, etc., to achieve delayed enabling action effective and reduce the effect of inrush current

Inactive Publication Date: 2009-04-01
孙娜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sudden appearance of power will cause serious noise in the entire circuit system, causing serious electromagnetic interference (EMI), and affecting the normal operation of peripheral circuits.
What's more, it will produce excessive electrical stress (Electrical Overstress, EOS), and burn the circuit components

Method used

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  • Voltage conversion device with soft startup function
  • Voltage conversion device with soft startup function
  • Voltage conversion device with soft startup function

Examples

Experimental program
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Embodiment Construction

[0013] figure 1 Shown is a circuit block diagram of a voltage converting device with a soft-start function according to an embodiment of the present invention. Please refer to figure 1 , the voltage conversion device 100 includes a soft start circuit 110 , a feedback module 120 and a low dropout voltage regulator circuit 130 . The soft start circuit 110 includes a capacitor C1 , resistors R1 - R2 and diodes D1 - D2 .

[0014] The low dropout voltage regulator circuit 130 has an input terminal IN, a voltage regulator output terminal OUT, an enable terminal EN and a feedback terminal FB. Wherein, the enable terminal EN is used to receive the enable signal ENIN, the input terminal IN is used to receive the input voltage VIN, and the voltage-stabilizing output terminal OUT is used to provide the output voltage VOUT. In addition, the feedback module 120 is coupled between the regulated output terminal OUT and the feedback terminal FB. The soft start circuit 110 is coupled betwe...

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PUM

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Abstract

The invention discloses a voltage conversion device with a soft start function. The voltage conversion device comprises a low dropout voltage stabilizing circuit, a feedback module and a soft start circuit, wherein, the soft start circuit comprises a first capacitor, a first resistor, a second resistor and a first diode. The soft start circuit used in the voltage conversion device only composed of driven elements, so the circuit structure is simple and is easy for realizing. Besides, the soft start circuit of the voltage conversion device can delay the start time of the low dropout voltage stabilizing circuit and effectively reduces the electromagnetic interference caused by inrush current further.

Description

technical field [0001] The present invention relates to a voltage conversion device, and in particular to a voltage conversion device with a soft start function. Background technique [0002] As people rely more and more on electronic products, the functions of electronic products are also complicated. In contrast, according to different functional requirements, different power supply equipment is also required, such as a very common low-drop-out (LDO) voltage regulator circuit. The advantage of this low-dropout voltage regulator circuit is that it is very simple to use, and the required output voltage can be obtained only by feeding back the ratio of the series resistance. In addition, the low dropout voltage regulator circuit can adjust the output voltage by adjusting the ratio of series resistors, so it is widely used in various types of power management devices. [0003] However, there is also a very serious shortcoming in the low dropout voltage regulator circuit, tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46H02M1/36
Inventor 夏春华刘士豪
Owner 孙娜
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