CN103176579A

CN103176579A - Computer power supply

Info

Publication number: CN103176579A
Application number: CN2011104347135A
Authority: CN
Inventors: 刘骅毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-22
Filing date: 2011-12-22
Publication date: 2013-06-26

Abstract

A computer power supply comprises alternating current input voltage and direct-current output voltage. The computer power supply is characterized in that the direct-current output voltage is positive 12.5V-positive 13.8V. The direct-current output voltage improves reliability of computer operation and guarantees normal operation of a computer especially when a load is large, avoids the phenomenon that the power output voltage cannot reach required voltage due to the fact that born load is large to lead the computer to be blue in screen to be halted in system.

Description

A kind of computer power supply

Technical field

The present invention relates to computer power supply, particularly the direct current supply of computer power supply.

Background technology

the computer power supply of active computer, the DC voltage of exporting is 5V, ± 12V, but the existence due to the internal resistance of source, will when being arranged, load current form interior resistance drop, this voltage drop form of expression is that output voltage descends, be 12.15V when connecing a 2000G big hard disk as the computer power of a nominal 350W, when accessing two, voltage drop is to 12.12V, voltage drop is to 12.10V when accessing three, but when at this moment hard disk is from dormant state or the larger current start of other needs, 12V voltage and then sudden change arrives 11.2V, obviously electricity shortage, because low voltage causes magnetic head action shake, normal following track signal, BSOD even appears, be easy to cause hard disk corruptions, when the output voltage amount of redundancy of computer power supply is inadequate, cause real power much smaller than nominal power, the computer power supply of a nominal 350W power, when the 12V winding voltage was 12.18V, actual net horsepower only had 146W.

Summary of the invention

Power supply provided by the present invention can overcome electric power output voltage, because reaching greatly, bearing load do not require voltage, the phenomenon that causes computing machine blue screen to occur and crash, when winding voltage provided by the invention is 12.99V, actual net horsepower can reach 300W, and the load capacity of power supply promotes 105%.

Principle of the present invention is as follows:

Principle of the present invention is: a kind of computer power supply comprises AC-input voltage and VD, it is characterized in that, described VD be+12. 5V～+ 13.8V.

The VD of described computer power supply is+12.96V.

Described computer power supply, the resistance value by R27 on 1 pin that will be connected on pulse width modulating chip TL494 changes 43k Ω into by 47k Ω, VD is adjusted into+12.96V.

Described computer power supply, the ON time of the power switch pipe by changing switch power triode or IC interior, perhaps pulse width, VD is adjusted into+12. 50V～+ 13.80V.

Described computer power supply, by changing each winding coil turn ratio, VD is adjusted into+12.50V～+ 13.80V.

Described computer power supply, by Resistor-Capacitor Unit setting-up time coefficient, VD is adjusted into+12. 50V～+ 13.80V.

Described computer power supply, by changing secondary mu balanced circuit, VD is adjusted into+12. 50V～+ 13.80V.

Described computer power supply, by without the filtering of primary switch power tube transformer direct-coupling secondary commutation, VD is adjusted into+12. 50V～+ 13.80V.

Described computer power supply, by adjusting the DC-DC change-over circuit, VD is adjusted into+12. 50V～+ 13.80V.

Technique effect of the present invention is: strengthened the reliability of computer run, particularly guaranteed the normal operation of computing machine when load is larger.

Description of drawings

Fig. 1: computer power supply schematic diagram.

Specific embodiment

Embodiment one:

As shown in Figure 1, a kind of computer power supply comprises pulse width modulating chip TL494, and 1, the 2 pin voltages of pulse width modulating chip TL494 are set in 2.5V, R25, R27 resistance is 47k Ω, and 12V winding output voltage is 12.18V, now changes R27 into 45k Ω, 1 pin that at this moment will keep pulse width modulating chip TL494 is 2.5V still, from essential rising of voltage that the output terminal feedback is come, at this moment 12V winding output voltage is elevated to 12.5V by 12.18V, and other is respectively organized VD and also follows corresponding rising.

Embodiment two:

As Fig. 1, a kind of computer power supply comprises pulse width modulating chip TL494, and 1, the 2 pin voltages of pulse width modulating chip TL494 are set in 2.5V, R25, R27 resistance is 47K k Ω, and 12V winding output voltage is 12.18V, now changes R27 into 43 k Ω, 1 pin that at this moment will keep pulse width modulating chip TL494 is 2.5V still, from essential rising of voltage that the output terminal feedback is come, at this moment 12V winding output voltage is elevated to 12.96V by 12.18V, and other is respectively organized VD and also follows corresponding rising.

Embodiment three:

As shown in Figure 1, a kind of computer power supply, comprise pulse width modulating chip TL494,1, the 2 pin voltages of pulse width modulating chip TL494 are set in 2.5V, R25, R27 resistance is set in 18 k Ω, 12V winding output voltage is 12.18V, now R27 is changed into 16 k Ω, 1 pin that at this moment will keep pulse width modulating chip TL494 is 2.5V still, and from essential rising of voltage that the output terminal feedback is come, at this moment 12V winding output voltage is elevated to 13.60V by 12.18V, other is respectively organized output voltage and also follows corresponding rising, achieves the goal.

Application example

Auspicious imperial 380 quiet editions computer power supplies, the pull down resistor of 1 pin of pulse width modulating chip TL494 is 18 k Ω, we change 16 k Ω into, 12V winding output voltage is elevated to 13.6V by original 12.25V, originally three hard disks of load are unreliable, find hot-swappable being difficult to when adding hard drive search hardware, and can hear that hard disk fast moving head arm attempts the sound of rattling away of following track failure, after being upgraded to 13.6V, hot-swappable when being added to 7 hard disks, also find soon new hardware, and normally read hard-disk content.

Claims

1. a computer power supply comprises AC-input voltage and VD, it is characterized in that: described VD be+12. 50V～+ 13.80V.

2. a kind of computer power supply as claimed in claim 1 is characterized in that: the VD of described computer power supply is+12.96V.

3. a kind of computer power supply as claimed in claim 2, is characterized in that: change 43k Ω by the resistance value that will be connected on the pressure limiting resistance R 27 on pulse width modulating chip TL494 into by 47k Ω, VD is adjusted into+12.96V.

4. a kind of computer power supply as claimed in claim 1 is characterized in that: change the ON time of the power switch pipe of switch power triode or IC interior, and perhaps pulse width, VD is adjusted into+12. 50V～+ 13.80V.

5. a kind of computer power supply as claimed in claim 1 is characterized in that: change each winding coil turn ratio, VD is adjusted into+12.50V～+ 13.80V.

6. a kind of computer power supply as claimed in claim 1 is characterized in that: by Resistor-Capacitor Unit setting-up time coefficient, VD is adjusted into+12. 50V～+ 13.80V.

7. a kind of computer power supply as claimed in claim 1 is characterized in that: by changing secondary mu balanced circuit, VD is adjusted into+12. 50V～+ 13.80V.

8. a kind of computer power supply as claimed in claim 1 is characterized in that: by without the filtering of primary switch power tube transformer direct-coupling secondary commutation, VD is adjusted into+12. 50V～+ 13.80V.

9. a kind of computer power supply as claimed in claim 1 is characterized in that: by adjusting the DC-DC change-over circuit, VD is adjusted into+12. 50V～+ 13.80V.