Apparatus and method for regulating working frequency of step-down conversion circuit by detection current

A technology of step-down conversion and operating frequency, which is applied in the conversion device of output power, conversion of DC power input to DC power output, and conversion equipment without intermediate conversion to AC, can solve the problems of complex detection process and high cost, and achieve The effect of controlling power consumption and avoiding energy waste

Inactive Publication Date: 2009-06-10
INVENTEC CORP
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Problems solved by technology

[0007] One of the purposes of the present invention is to provide a device for adjusting the operating frequency of the step-down con

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  • Apparatus and method for regulating working frequency of step-down conversion circuit by detection current
  • Apparatus and method for regulating working frequency of step-down conversion circuit by detection current
  • Apparatus and method for regulating working frequency of step-down conversion circuit by detection current

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Embodiment Construction

[0024] One of the features of the present invention is to detect the output current of the step-down conversion circuit (VRD), thereby judging that the central processing unit (CPU) is in a heavy-load or light-load state, and by switching the resistance to switch the operating frequency of the step-down conversion circuit, to achieve control of the voltage drop. purpose of voltage conversion circuit power dissipation.

[0025] refer to figure 1 , which is a schematic structural diagram of a device for adjusting the operating frequency of a step-down conversion circuit by detecting current according to an embodiment of the present invention. The device 100 for adjusting the operating frequency of the step-down conversion circuit by detecting the current of this embodiment is used to detect the magnitude of the current flowing out of the step-down conversion circuit 105 that supplies power to the central processing unit 107 to detect the load status of the central processing uni...

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Abstract

The invention provides a device and a method for regulating the working frequency of a voltage reduction switching circuit through current detection. The device comprises a current detection circuit, a variable module and a controller. The current detection circuit is used for judging the output load state of the voltage reduction switching circuit through the detection of the size of current flowing out from the voltage reduction switching circuit and outputting a control signal for regulating the working frequency of the voltage reduction switching circuit according to the load state. The variable module is coupled with the voltage reduction switching circuit and is used for providing an external resistor for the voltage reduction switching circuit. The controller is coupled to a current monitoring module and the variable module and is used for receiving the control signal and regulating the resistance value of the variable module according to the control signal so as to regulate the working frequency of the voltage reduction switching circuit. The device and the method can reduce loss of the voltage reduction switching circuit.

Description

technical field [0001] The present invention relates to a power supply technology, and in particular to a technology for reducing the loss of power supply equipment. Background technique [0002] With the development of electronic information technology, many circuits are required to convert the battery voltage into a power supply voltage, such as mobile phones, laptop computers and other battery-powered handheld devices, all need to convert the battery voltage into a power supply voltage. The VRD (voltage regulator down, step-down conversion circuit) module is used in a general power supply as a basic voltage regulation circuit, so more and more VRD modules are used in various electronic products. [0003] Most of the current computers use VRD as a power supply device for the CPU (Central Processing Unit). However, since the current VRD modules all adopt a fixed switching frequency, when it is applied to a computer, the frequency of the VRD module remains unchanged regardl...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02M3/157
Inventor 曾理刘士豪
Owner INVENTEC CORP
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