Isolated high-light load efficiency low-output voltage high-current switch power source

A low output voltage, high current switching technology, applied in the direction of converting DC power input to DC power output, output power conversion devices, electrical components, etc., can solve problems such as high cost and complex peripheral circuits, and achieve low cost and reliability. Good performance, the effect of preventing voltage spikes

Inactive Publication Date: 2012-05-23
江苏久日数控机床有限公司 +1
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  • Abstract
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Problems solved by technology

From the perspective of existing technologies, most of them are based on integrated circuits, using complex control of application-specific integrated circuits to switch between switching power supply modes at light loads and improve light-load efficiency, but generally such integrated circuits are relatively expensive. The peripheral circuit is complex, only suitable for the application of high-end power supply

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  • Isolated high-light load efficiency low-output voltage high-current switch power source
  • Isolated high-light load efficiency low-output voltage high-current switch power source
  • Isolated high-light load efficiency low-output voltage high-current switch power source

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0022] Such as figure 1 As shown, an isolated low output voltage high current switching power supply with high light load efficiency includes active clamp primary switching circuit 1, isolation transformer 2, synchronous rectification circuit 3, output filter circuit 5, output sampling circuit 6, error Amplify the isolation circuit 7 and the pulse width modulation control circuit 10, wherein the active clamp primary switch circuit 1 is sequentially connected in series with the isolation transformer 2 and the synchronous rectification circuit 3, and the active clamp primary switch circuit 1 is sequentially connected in series with the pulse width modulation control circuit 10 , error amplification isolation circuit 7, output sampling circuit 6 and output filter circuit 5, active clamp primary switch circuit 1 and pulse width modulation control circuit 10 are common...

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Abstract

The invention discloses an isolated high-light load efficiency low-output voltage high-current switch power source which comprises an active clamping primary switching circuit (1), an insulating transformer (2), a synchronous rectification circuit (3), an output filter circuit (5), an output sample circuit (6), an error magnification isolation circuit (7), a pulse width modulation control circuit(10), an auxiliary follow current pipe (4), a load sensing circuit (8) and an isolation driver circuit (9). The invention greatly lowers the light load power consumption of the switching converter, and has the advantages of simple structure, low cost and high reliability.

Description

technical field [0001] The invention relates to a switching power supply, in particular to an isolated low output voltage high current switching power supply with high light load efficiency. Background technique [0002] At present, whether it is CPU, DSP and other processors, or other digital integrated circuits, their power supply voltage is getting lower and lower, and the core voltage is about 1V, and with the progress of semiconductor technology, this voltage still has a downward trend. Due to the reduction of voltage, under the same power condition, the increase of current will inevitably occur. For example, a 50W CPU powered by 1V will have a current of 50A. Therefore, the switching power supply with low voltage and high current is currently a research hotspot with rapid development. [0003] The power supply of CPU and other processors, due to the low input voltage, is generally around 12V, and generally adopts a non-isolated multi-phase BUCK structure. For commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 徐申孙大鹰孙伟锋阚明建陆生礼时龙兴
Owner 江苏久日数控机床有限公司
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