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Power supplying circuit of central processing unit and operational approach thereof

A technology of central processing unit and power supply circuit, applied in data processing power supply, measurement device, measurement flow/mass flow, etc., can solve the problems of large component area and high cost of POSCAP, and achieve the effect of suppressing audio noise and avoiding driving operation.

Active Publication Date: 2014-05-28
PEGATRON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, POSCAP has disadvantages such as high cost and large component area

Method used

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  • Power supplying circuit of central processing unit and operational approach thereof
  • Power supplying circuit of central processing unit and operational approach thereof
  • Power supplying circuit of central processing unit and operational approach thereof

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Experimental program
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Embodiment Construction

[0024] figure 1 It is a schematic diagram illustrating the functional modules of a central processing unit power supply circuit 100 according to an embodiment of the present invention. The central processing unit power supply circuit 100 is connected to the power supply 102 and the central processing unit 103 . In this embodiment, the power supply 102 may be a power adapter. The power supply 102 can convert the mains 101 (AC voltage source) into an input voltage Vin, and then provide the input voltage Vin to the computer system.

[0025] In this embodiment, the power supply 102 also includes a conversion circuit for converting into multiple sets of DC voltages, which can convert the higher voltage Vin (usually 19V) into the voltage required by each device, for example: 3.3V and 5V. Therefore, in this embodiment, the conversion circuit is a DC-DC power type conversion. In other embodiments, the input voltage Vin can also be supplied by a battery module, which is not limited...

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PUM

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Abstract

A power supplying circuit of central processing unit and operational approach thereof. The power supply circuit is connected between a power supply unit and the central processing unit. The power supply circuit includes a voltage transforming circuit, a sampling unit, a setting unit and a comparator. The voltage transform circuit consists of an input capacitance and an inductance, the input capacitance links the power supply unit, output end of the inductance links the central processing unit. The sampling unit links input end of the inductance, to input a signal from the input end of the sampling inductance and transform the input signal for providing the sampling voltage. The setting unit links an operation mode controlling terminal of the voltage transforming circuit. The comparator links the sampling unit and the setting unit, and compares a sampling voltage and a reference voltage. When the sampling voltage is less than the reference voltage, the comparator controls the setting unit, to ensure the voltage transforming circuit enters into a continuous conduction mode.

Description

technical field [0001] The present invention relates to a power supply circuit, and in particular to a central processing unit power supply circuit and its operating method. Background technique [0002] General personal computers, such as notebook (notebook, NB) computers, often use multi-layer ceramic capacitors (Multi-Layer Ceramic Capacitor, MLCC) in the capacitor (such as input capacitor) part of the central processing unit (CPU) power supply circuit ) to reduce cost and component area. However, when the operating frequency of the CPU power supply circuit falls within the audio frequency range that can be detected by the human ear, components such as multilayer ceramic capacitors will emit audio noise due to the piezoelectric effect. The traditional way to solve the audio noise problem is to use capacitors with less piezoelectric effect, such as Polymerized Organic Semiconductor Capacitors (POSCAPs) or other electrolytic capacitors, to reduce the audio noise caused by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/26
Inventor 钟荣华吴永禄沈文君
Owner PEGATRON
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