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Feed circuit of mainboard

A technology of power supply circuit and main board, which is applied in the direction of data processing power supply, measuring device, measuring flow/mass flow, etc., and can solve the problem that the main board cannot provide enough voltage

Inactive Publication Date: 2008-06-11
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the mainboard power supply circuit of the existing design scheme, only a fixed 1.2V voltage can be output under a 5V input voltage, which cannot provide enough voltage for the mainboard when overclocking

Method used

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  • Feed circuit of mainboard
  • Feed circuit of mainboard

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Embodiment Construction

[0010] Please refer to Fig. 2, the preferred embodiment of the motherboard power supply circuit of the present invention includes a south bridge chip U2 and a voltage conversion circuit 200, the voltage conversion circuit 200 includes a pulse width modulation control chip U1, and the pulse width modulation control chip U1 It includes a starting terminal 111 , an upper tube driving terminal 121 , a lower tube driving terminal 141 , a common terminal 151 , a feedback terminal 161 , an overcurrent protection terminal 171 and a phase terminal 181 . The common terminal 151 is connected to a 12V power supply through a resistor R61, and the common terminal 151 is also connected to the anode of a diode D11, the cathode of the diode D11 is connected to the starting terminal 111, and the cathode of the diode D11 is also connected to the starting terminal 111. It is connected to the phase terminal 181 through a capacitor C41. The upper tube drive end 121 is connected to the gate of a fir...

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Abstract

A mainboard power supply circuit is provided, which is used for providing voltage for the mainboard when the mainboard exceeds frequency, and comprises a south bridge chip and a voltage transversion circuit, the voltage transversion circuit comprises an output end, the south bridge chip comprises at least one universal input output port, the each universal input output port is connected to the voltage transversion circuit through a resistance. Compared with the prior art, the mainboard power supply circuit controls output of the universal input output port through the controlling of a computer basic input output system, so as to control whether the resistance connected with the universal input output port is accessed into the voltage transversion circuit, the voltage transversion circuit can output different voltage at the output end according to the resistance value of the accessed resistance.

Description

technical field [0001] The invention relates to a mainboard power supply circuit, in particular to a mainboard power supply circuit for supplying voltage to the mainboard when the computer mainboard is overclocked. Background technique [0002] With the continuous development of motherboard technology, overclocking has become an important technology for motherboards. However, due to many problems such as heat dissipation and power consumption, the stability of the motherboard during overclocking is greatly reduced. Moreover, the output of the power supply is often lower than the lower limit during overclocking, which cannot provide enough voltage for the motherboard. As shown in FIG. 1 , an existing motherboard power supply circuit 100 is shown. The motherboard power supply circuit 100 includes a pulse width modulation control chip U, and the pulse width modulation control chip U includes a starting terminal 11, an upper tube driving terminal 12, a lower tube driving termin...

Claims

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Application Information

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IPC IPC(8): G06F1/26
Inventor 何凤龙
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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