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Method for reducing power jitter of power supply in cold backup mode

A cold backup and mode technology, applied in data processing power supply, electrical digital data processing, instruments, etc., can solve problems such as power fluctuations, achieve the effect of simple structure, reliable design principle, and outstanding substantive features

Active Publication Date: 2018-10-16
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual test, the output voltage of the PFC bus in this mode fluctuates by about 6V, and the input current has current when the circuit is working, and there is no current when the circuit is intermittent, resulting in obvious power fluctuations.

Method used

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  • Method for reducing power jitter of power supply in cold backup mode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for reducing power jitter of a power supply in cold backup mode provided by the present invention is characterized in that it comprises the following steps:

[0027] S1: The PFC current loop adopts PI control, and the loop output is limited up and down to give the PFC duty cycle;

[0028] S2: The lower limit of the PFC loop output is set to a negative value less than 0; this negative value will participate in the next PI calculation;

[0029] S3: The negative value is sent to the PFC wave through a lower limit of 0, so that the minimum duty cycle of the PFC wave is 0.

Embodiment 2

[0031] In the step S2, PI output=KI*last PI output result+KP*this input amount.

Embodiment 3

[0033] The PFC current loop in the step S1 is a charge pump phase-locked loop, and the charge pump phase-locked loop includes a phase frequency detector (PFD), a charge pump (CP), a low-pass filter (LPF), a voltage-controlled oscillator (VCO) feedback divider (1 / N); constant between input phase and output phase.

[0034] When the frequency division factor of the feedback divider is set to N, the PLL can control the reference clock ω ref Do N multiplication.

[0035] When the input phase changes suddenly, the output of the closed-loop system follows the change of the input phase within the loop bandwidth.

[0036] The frequency and phase detector compares the input reference clock ω ref and feedback divider clock ω fb Between the phases, the UP and DN signals are obtained, and the UP and DN signals control the charging and discharging of the charge pump.

[0037] when ω ref Advance ω fb When , the UP signal opens the pull-up path to charge the low-pass filter LPF, so that...

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PUM

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Abstract

The invention relates to a method for reducing power jitter of a power supply in a cold backup mode. The method is characterized by comprising the following steps that S1, a PFC current loop adopts PIcontrol, loop output passes upper and lower limit amplitudes, and duty ratio is provided for PFC; S2, the lower limit of the PFC loop output is set to a negative value less than 0; the negative valueparticipates in next PI calculation; S3, the negative value is sent to PFC transmitted waves through a lower limit 0, so that the minimum duty ratio of the PFC transmitted waves is 0.

Description

technical field [0001] The invention belongs to the technical field of power supply fluctuation control, and in particular relates to a method for reducing power jitter of a power supply in a cold backup mode. Background technique [0002] A power supply is a device that provides power to electronic equipment, also known as a power supply, which provides the electrical energy required by all components in the computer. The size of the power supply, whether the current and voltage are stable will directly affect the working performance and service life of the computer. [0003] The computer power supply is a closed independent component installed in the main box. Its function is to convert the AC power into 5V, -5V, +12V, -12V, +3.3V and other stable DC power through a switching power supply transformer to supply It is used for system components such as the system version, floppy disk, hard disk drive and various adapter expansion cards in the main box. Generally speaking, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/30
CPCG06F1/305
Inventor 何清平肖波杨晓东
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD