CPU supply circuit protecting system
A technology for protecting systems and power supply circuits, applied in data processing power supplies, electrical digital data processing, measuring devices, etc., and can solve problems such as field effect tube damage, temperature rise, and CPU computer motherboard damage.
Active Publication Date: 2014-01-29
石家庄大象电子科技有限公司
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Problems solved by technology
[0003] Usually, the power supply circuit of the CPU includes two FETs and adjusts the voltage provided by the power supply to the CPU by controlling its on and off. However, during the operation of the computer, due to the thermal effect of the current, the FETs If the temperature rises, if the temperature of the field effect tube cannot be accurately detected and corresponding measures are taken, the field effect tube may be destroyed, thereby causing damage to the CPU or the computer motherboard
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[0012] Please refer to figure 1 A preferred embodiment of the CPU power supply circuit protection system 100 of the present invention includes a power supply 10, a CPU power controller 30, a CPU 20, a detection circuit 40, a circuit consisting of two field effect transistors 51, 52 and a heat The electronic component 50, an inductor L1 and capacitors C1-C3 are packaged together by the sensitive resistor RT. The power supply 10 is used to convert external AC power into DC power used by the computer system. The CPU power controller 30 stores a first preset value and a second preset value. In this embodiment, the thermistor RT has a positive temperature coefficient, and its resistance increases as the ambient temperature increases. The detection circuit 40 is used to detect the voltage across the inductor L1.
[0013] The voltage setting pin VID of the CPU power controller 30 is connected to the voltage setting pin VID of the CPU 20 to receive the signal output by the voltage ...
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A system includes a power supply unit, a central processing unit (CPU) power controller, a detecting circuit, an inductor, a thermal resistor, first and second field effect transistors (FETs), and first to third capacitors. The CPU power controller detects a voltage of the thermal resistor and compares the detected voltage with first and second preset values. If the detected voltage is greater than the first preset value and less than the second preset value, the CPU power controller outputs a first control signal to a base management controller (BMC) chip for signaling the BMC chip to control the fan to increase a speed. If the detected voltage is greater than the second preset value, the CPU controller outputs a second control signal to the CPU for signaling the CPU to regulate a working frequency or reduce a number of loads.
Description
technical field [0001] The invention relates to a circuit protection system, in particular to a protection system for a CPU power supply circuit. Background technique [0002] The CPU on the motherboard must get a sufficient working voltage from the computer motherboard to work properly. Generally, a CPU voltage supply circuit is provided on the main board to convert the output voltage of the power supply of the computer into the working voltage required by the CPU to supply power to the CPU to maintain the normal operation of the CPU. [0003] Usually, the power supply circuit of the CPU includes two FETs and adjusts the voltage provided by the power supply to the CPU by controlling its on and off. However, during the operation of the computer, due to the thermal effect of the current, the FETs If the temperature rises, if the temperature of the field effect tube cannot be accurately detected and corresponding measures are taken, the field effect tube may be destroyed, and...
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IPC IPC(8): G06F1/26
CPCG06F1/26G06F1/20G06F1/28
Inventor 李计朝
Owner 石家庄大象电子科技有限公司