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High efficient switchover power converter

A technology for switching power and converters, which is applied to output power conversion devices, AC power input conversion to AC power output, conversion equipment that can convert to DC without intermediate conversion, etc.

Inactive Publication Date: 2007-02-14
SYST GEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Equation 1 shows that the power loss in the leakage inductance increases in response to an increase in switching frequency

Method used

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  • High efficient switchover power converter
  • High efficient switchover power converter
  • High efficient switchover power converter

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] figure 2 A switching power converter according to an embodiment of the invention is shown. The switching power converter may be a power converter or a switching regulator. The transformer 10 comprises a main winding N P and secondary winding N S . Main winding N of transformer 10 P It has a first terminal and a second terminal. Secondary winding N of transformer 10 S Coupled to the output of the switching power converter through a rectifier-filter 50 . Transistor 11 from the input voltage V IN connected to the main winding N P the first terminal of . The transistor 11 includes a parasitic diode 16 . Transistor 21 from the main winding N P The second terminal of is connected to ground. The transistor 21 includes a parasitic diode 26 . Diode 37 from the main winding N P The second terminal of is connected to the input voltage V IN . Diode 35 is coupled from ground to the main winding N P the first terminal of . Transistor 31 from the main winding N P T...

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PUM

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Abstract

This invention relates to a switch power converter having a first and a second transistor, in which, the two transistors are serial to a transformer to provide higher switch efficiency, a charge pump circuit is coupled to a drive circuit to provide a supply to drive said first transistor, a third transistor is connected between the transformer and the earth to help the switch of the transformer and charge of the charge pump circuit, the switch control circuit is coupled to the output of said switch power converter to generate a first switch signal and a second switch signal to regulate said switch power converter, said first switch signal is coupled to drive the two transistors and the second signal is coupled to drive the third transistor.

Description

technical field [0001] The present invention relates to power converters, and more particularly to switching power converters and switching regulators. Background technique [0002] Power converters have been used to convert unregulated power supplies to regulated voltage and / or current sources. The transformer of the power converter is configured to provide isolation between the input power source and the application device for safety purposes. figure 1 Demonstration of a conventional switching power converter. Transistor 5 is connected to the main winding N of transformer 40 P Used to switch the transformer 40. Therefore, the secondary winding N of transformer 40 S Power is generated which is coupled to the output of the power converter through a rectifier and filter 50 . A leakage inductor 45 will be created in the transformer 40 due to geometrical limitations of the transformer. The inductance L of the leakage inductor 45 L Indicates that it cannot be transferred ...

Claims

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Application Information

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IPC IPC(8): H02M5/10H02M5/275
Inventor 杨大勇
Owner SYST GEN