Digital voltage regulating module with high fractional load efficiency and high dynamic characteristic

A digital voltage and regulation module technology, applied in the direction of regulating electrical variables, control/regulation systems, output power conversion devices, etc., to achieve the effect of improving light-load efficiency, reliability, and output voltage accuracy, and reducing output capacitance values.

Inactive Publication Date: 2014-04-16
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Existing voltage regulation modules are diffi

Method used

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  • Digital voltage regulating module with high fractional load efficiency and high dynamic characteristic
  • Digital voltage regulating module with high fractional load efficiency and high dynamic characteristic
  • Digital voltage regulating module with high fractional load efficiency and high dynamic characteristic

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0021] see figure 1 , the present invention includes a DC voltage source V1, a voltage output terminal, a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a first inductance L1, a second inductance L2 and a DSC; The drain of the first MOS transistor Q1 and the drain of the third MOS transistor Q3 are connected to the positive pole of the DC voltage source V1, and the negative pole of the DC voltage source V1 is grounded; the source of the first MOS transistor Q1 is connected to the drain of the second MOS transistor Q2 The source of the third MOS transistor Q3 is connected to the drain of the fourth MOS transistor Q4; the source of the second MOS transistor Q2 and the source of the fourth MOS transistor Q4 are grounded; the drain of the second MOS transistor Q2 is connected to the drain of the fourth MOS trans...

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Abstract

The invention discloses a digital voltage regulating module with the high fractional load efficiency and the high dynamic characteristic. The digital voltage regulating module comprises a direct-current voltage source, a voltage output end, a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a first inductor, a second inductor and a DSC. A main circuit adopts an interlaced BUCK topology circuit and a main switching tube Q1 is conducted with a main switching tube Q3 by being interlaced with the main switching tube Q3 in 180 degrees. Thus, output current ripples are greatly reduced, the ripple frequency of output currents is increased to be two times that of original output currents and the output filter inductance and the output capacitance can be greatly reduced as the ripple frequency is increased. Thus, the dynamic responding speed of a VRM is improved. In addition, in the time of fraction load, two synchronization rectifier tubes Q2, Q4 are switched off, so that inductance currents are continued through a current continuing diode D2s and a fly-wheel diode Ds4. Thus, a single-phase BUCK circuit can work under a DCM mode, switching losses of the switching tubes and magnetic core losses are greatly reduced and the fraction load efficiency of the VRM is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of digital switching power supplies, in particular to a digital voltage regulation module with high light-load efficiency and high dynamic characteristics. Background technique [0002] With the rapid development of electronic technology, the application of central processing unit (CPU) is more and more extensive. In order to reduce losses, low-voltage, high-current power supplies are usually selected as their power supply. This kind of power supply for special loads is called VRM (Voltage Regulator Module), that is, voltage regulation module. [0003] In recent years, due to the continuous improvement of the performance of the CPU, the requirements for its power supply VRM are also increasing: [0004] Low voltage and high voltage accuracy. The output voltage of the VRM has been reduced from the original minimum of 1.3V to the minimum of 0.5V, and the future VRM may be lowered. Such a low output voltage h...

Claims

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Application Information

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IPC IPC(8): H02M3/157
Inventor 史永胜余彬张震强王喜锋宁青菊
Owner SHAANXI UNIV OF SCI & TECH
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