High efficiency half-bridge DC/DC convertor

A DC converter, high-efficiency technology, applied in the field of high-efficiency half-bridge DC/DC converters, can solve problems such as reducing efficiency

Inactive Publication Date: 2007-01-10
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the energy from the primary coil of the transformer is difficult to be transferred to its secondary coil, thus reducing the efficiency

Method used

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  • High efficiency half-bridge DC/DC convertor
  • High efficiency half-bridge DC/DC convertor
  • High efficiency half-bridge DC/DC convertor

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the same reference numerals designate the same or similar components in different drawings.

[0033] Figure 4 is a configuration diagram showing a half-bridge DC / DC converter according to the present invention.

[0034] refer to Figure 4 , the high school half-bridge DC / DC converter of the present invention includes a controller 100 , a switching component 200 , a transformer 300 , a rectifier 400 and a feedback circuit 500 .

[0035] The controller 100 provides first and second switching signals SSW1, SSW2 with variable pulse widths. Here, the high level of the first switching signal SSW1 does not overlap with the high level of the second switching signal SSW2. Similarly, the low level of the first switch signal SSW1 does not overlap with the low level of the second switch signal SSW2. The controller 100 changes the pulse widths of t...

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Abstract

In the DC/DC converter, a switching part has first and second switches serially connected from a power supply to a ground. The first and second switches switch on/off in response to first and second switching signals having a fixed frequency. The first switching signal has a phase level that does not overlap a corresponding phase level of the second switching signal. A transformer transforms a voltage applied to a first winding into a second winding in response to switching operation of the switching part, and resonates by an inductor and a capacitor of the first winding. Also, a rectifier includes a rectifying diode for rectifying the voltage from the transformer into a direct voltage. A feedback circuit detects the voltage outputted via the rectifier. Additionally, a controller controls pulse width of the first and second switching signals in a PWM mode according to the voltage detected by the feedback circuit.

Description

[0001] This application claims priority to Korean Patent Application No. 2005-61292 filed with KIPO on Jul. 7, 2005 and Korean Patent Application No. 2006-53634 filed with KIPO on Jun. 14, 2006 , the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a high-efficiency DC / DC converter used in a power supply of a display such as a PDP or LCD, and more particularly to a high-efficiency half-bridge DC / DC converter capable of using fixed switching frequency, pulse width modulation (Pulse Width Modulation, PWM) mode and current resonance to ensure high efficiency in the overall range from minimum load to maximum load when applied to power supplies such as SMPS for PDPs with large load variations, and to ensure reduced switching of rectifier diodes stress. Background technique [0003] In general, a switch mode power supply (Switching Mode Power Supply, SMPS) is a power supply device for using a semiconductor de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335
CPCH02M1/083H02M3/335H03K17/13H02M1/0003
Inventor 许泰远柳东均冈田洋一永原清和
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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