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Intelligent control method and circuit for reducing electromagnetic radiation of switching power supply

An electromagnetic radiation and intelligent control technology, which is applied in the direction of data processing power supply, control/regulation system, and measurement of interference from external sources, can solve the problems of conduction test failure, etc., to ensure conversion efficiency, reduce electromagnetic radiation and conduction radiation. Effect

Inactive Publication Date: 2021-03-19
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the EMC test, due to the existence of PWM, it is easy to cause the conduction test to fail

Method used

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  • Intelligent control method and circuit for reducing electromagnetic radiation of switching power supply
  • Intelligent control method and circuit for reducing electromagnetic radiation of switching power supply

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Embodiment Construction

[0028] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0029] see figure 1 and figure 2 , the embodiment of the present invention includes:

[0030] See figure 1 , an intelligent control method for reducing electromagnetic radiation of a switching power supply, the method comprising:

[0031] The power control chip outputs the power control signal to the power switch in the server;

[0032] CPLD sets the working state according to the server test working mode;

[0033] The working state includes a first working state, a second working state and a third working state;

[0034] The first working state is that the clock control signal of the CPLD outputs a low level;

[0035] The second working s...

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PUM

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Abstract

The invention discloses an intelligent control method and circuit for reducing electromagnetic radiation of a switching power supply. The method comprises the following steps:a power supply control chip outputs a power supply control signal to a power supply switch in a server; a CPLD controls a mos tube according to the server test working mode and selects a first working state, a second workingstate and a third working state; the first working state is that a clock control signal of the CPLD continuously outputs a low level; in the second working state, the clock control signal of the CPLDcontrols the mos tube according to 0.5 time of the frequency of the power supply control signal; the third working state is that a clock control signal of the CPLD continuously outputs a high level; and through the mode, the clock rising edge time of the switching power supply can be controlled, and the energy of the high-frequency component is reduced, so that the electromagnetic radiation and conduction radiation capabilities of the switching power supply are reduced.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to an intelligent control method and circuit for reducing electromagnetic radiation of a switching power supply. Background technique [0002] In the power supply scheme of the server, the DC-DC power conversion is usually performed by the BUCK circuit. The PSU power supply outputs 12V, but the chipsets with different functions of the motherboard require different voltages, including 5V, 3.3V, 1.2V, etc. [0003] Due to the high reliability and high stability requirements of the server system, and the high integration of the current power chip. The form of the BUCK circuit can already be directly composed of an external inductor and capacitor on the power chip. [0004] Through the action of inductance and capacitance, the 12V DC power supply voltage is converted into other voltages, such as 5V, 3.3V, 1.2V, etc. [0005] Due to the large amount of calculation in the server, the calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44H02M3/158G06F1/26G01R31/00
CPCG01R31/001G06F1/26H02M1/44H02M3/158
Inventor 崔杰鲍乐梅
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD
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