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Power source converter improving synchronous rectifying loop breakdown

A power converter, synchronous rectification technology, applied in output power conversion devices, DC power input into DC power output, instruments and other directions, can solve the problems of short service life and high production costs, achieve long service life, increase use Lifespan, effect of reducing duration

Inactive Publication Date: 2009-04-29
INVENTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a power converter that improves the breakdown of synchronous rectification circuit, so as to solve the shortcomings of short service life and high production cost caused by the breakdown phenomenon in the prior art

Method used

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  • Power source converter improving synchronous rectifying loop breakdown
  • Power source converter improving synchronous rectifying loop breakdown
  • Power source converter improving synchronous rectifying loop breakdown

Examples

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Embodiment Construction

[0023] One of the features of the present invention is that a resistor and / or a Schottky diode are added to the usual circuit, which strengthens the safety of the transistor and avoids field effect transistors in the high voltage region and the low voltage region to a greater extent. The breakdown phenomenon makes the design safer and more reliable.

[0024] Referring to FIG. 3 , it is a schematic structural diagram of a power converter for improving synchronous rectification loop breakdown according to an embodiment of the present invention. The power converter of the present invention is a DC / DC converter for converting an input voltage into an output voltage. As shown in the figure, the power converter for improving synchronous rectification circuit breakdown includes a comparison circuit 301 , a modulation circuit 303 , a power circuit 305 , a voltage stabilization circuit 307 and a feedback circuit 309 . Wherein, the power circuit 305 is used for converting the input vol...

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PUM

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Abstract

The invention provides a power converter used for improving synchronous rectifier circuit breakdown and converting an input voltage into an output voltage; the power converter comprises a power circuit, a comparison circuit and a modulation circuit; wherein, the power circuit comprises a high-stand driving circuit, a low-stand driving circuit, a first transistor, a second transistor, a first resistance, a first diode, a power supply circuit and a second resistance; one end of the first resistance is coupled to the grid of a second transistor and the other end thereof is coupled to the low-stand driving circuit; furthermore, the first diode is connected in parallel with the first resistance; the anode of the first diode is coupled to the grid of the second transistor and the cathode thereof is connected with the low-stand driving circuit. In the invention, the power converter leads the first resistance to be connected in parallel with the first diode, thus reducing the effects of the first resistance on the self-adapting threshold driving circuit, thereby reducing the breakdown possibility.

Description

technical field [0001] The present invention relates to a DC / DC power converter, and in particular to a synchronous rectification circuit in a DC / DC power converter. Background technique [0002] In recent years, due to the continuous progress of the integrated circuit IC, the application of electronic products has become increasingly widespread and the demand has increased. The circuit design of various electronic products has become more and more complex, and many circuits are designed to convert the battery voltage into a lower power supply. Voltage, such as mobile phones, personal digital assistants (PDAs) and other battery-powered handheld devices, such as laptop computers, and buck converters are used in general power supplies as a basic voltage regulator Therefore, more and more DC / DC (direct current to direct current) converters are used in various electronic products. [0003] The function of the DC / DC converter is to convert the voltage into the required voltage a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M3/156
Inventor 夏春华刘士豪
Owner INVENTEC CORP
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