Multi-output DC-DC converter having improved cross modulated performance

A technology of DC converter and output filter, which is applied in the direction of converting equipment, instruments, and adjusting electric variables with intermediate conversion to AC, so as to achieve the best cross-adjustment performance effect

Active Publication Date: 2007-10-31
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if there are extremely strict requirements on the cross-regulation performance of the converter, it is difficult to meet the requirements only by the coupled inductor on the output terminal.

Method used

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  • Multi-output DC-DC converter having improved cross modulated performance
  • Multi-output DC-DC converter having improved cross modulated performance
  • Multi-output DC-DC converter having improved cross modulated performance

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Embodiment Construction

[0023] Preferred embodiments embodying the features and advantages of the present invention will be described in detail in the ensuing description. It should be understood that the invention is capable of various changes in different embodiments without departing from the scope of the invention, and that the description and drawings are illustrative in nature rather than limiting the invention.

[0024] FIG. 1 shows a schematic diagram of the circuit structure of a known multiple-output DC-DC converter. It should be noted that the same reference numerals refer to the same elements throughout the description of the present invention. As shown in FIG. 1, a forward converter (forward converter) 100 includes a transformer 102, has a primary winding (primary winding) N1 and multiple secondary windings N2, N3, and a primary circuit (primary circuit) and multiple A secondary circuit (secondary circuit) 103, 104, wherein the primary circuit is composed of a switch S and a control loo...

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Abstract

The invention discloses a multiple outputs direct current-direct current converter which can improve across adjustment performance, thereinto nonlinear inductance element which is used as drain inductance of output coupling inductance is set on output path of at least one secondary circuit of first winding which is coupled to the transformer. The change of inductance value of the nonlinear inductance element is revered with the current of the nonlinear inductance element. When load on an output end of the direct current-direct current converter is changed, the output path with bigger load current can generate smaller drain inductance and the output path with smaller load current can generate bigger drain inductance, so current in output end of the direct current-direct current converter can be balanced.

Description

technical field [0001] The present invention relates to a multiple output DC-DC converter, in particular to a multiple output DC-DC converter with improved cross regulation performance. Background technique [0002] For power supplies for personal computers, power supplies that can provide multiple output voltage levels are often used to meet various electronic products with different input voltage specifications. Therefore, generally speaking, a switching power supply used in a personal computer usually provides an output voltage such as 12V or 5V to drive various peripheral devices. [0003] For a multi-output power supply, especially a multi-output DC-DC converter, the load electrically connected thereto is not constant. When the load on one output terminal changes, it will cause the output voltage on the other output terminal to change in response to the output current change on the output terminal whose load changes. In order to adjust the output voltage variation cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28G05F1/46
Inventor 陈为卢增艺裘钢明
Owner DELTA ELECTRONICS INC
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