Abstract: A circuit for providing a dummy load includes first to fifth resistors, a comparator, and first to fifth electronic switches. When a power good signal from a power supply is at a low level signal, the first electronic switch is turned off. The second to fourth electronic switches are turned on. The fifth electronic switch is turned off. When the power good signal from the power supply is at a high level signal, the first electronic switch is turned on. The second to fourth electronic switches are turned off. The fifth electronic switch is turned off.

Abstract: A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC power supply is first switched on, and the first MOSFET is switched on to connect the DC power supply to the load when the first charge capacitor is fully charged. The controller regulates resistance of the first potentiometer to regulate a charge time constant of the first charge capacitor, enabling a gradual rise in voltage supplied, from approximately zero to full power, within a desired period of time.

Abstract: A circuit for displaying failure information of a power supply unit supplying power to a central processing unit includes a controller including a random access memory (RAM) to store failure information of the power supply unit, a DC power circuit, a processing unit connected to the controller for reading the fault reasons stored in the RAM, and a display unit to display the fault reasons. When the power supply unit does not operate, the DC power circuit supplies power to the controller, such that fault reasons stored in the RAM will not be lost.

Abstract: A power adapter includes a processing circuit converting mains power to another alternating current (AC) power or a direct current (DC) power, a first output outputting the converted AC or DC power, a sense resistor connected between the processing circuit and the first output for sampling current flowing through the first output and converting the sampled current to a sampled voltage, an amplifying circuit connected to the sense resistor for amplifying the sampled voltage, and a metallic oxide semiconductor field effect transistor (MOSFET). A gate of the MOSFET is connected to the amplifying circuit. A drain of the MOSFET is connected to the first output through a first resistor and grounded through a second resistor. A source of the MOSFET is grounded. A node between the first and second resistors is connected to the processing circuit. The amplifying circuit makes the MOSFET work in a variable resistance region.

Abstract: A power supply device for a solid state drive (SSD) inserted into a slot of a computer includes a number of voltage input contacts, a diode, a first voltage regulating module and a second voltage regulating module connected in series. The slot includes a number of voltage output contacts and a number of signal transmitting contacts. The voltage input contacts are connected to the voltage output contacts and selectively connected to the signal transmitting contacts. The voltage input contacts obtains an initial voltage from the slot from the voltage output contacts or the signal transmitting contacts. The first voltage regulating module boosts the initial voltage. The second voltage regulating module regulates the boosted voltage to a preset voltage. The diode prevents a voltage outputting from the voltage input contacts to the signal transmitting contacts.

Abstract: A circuit protection system for an electronic system includes a platform control hub (PCH), a PCH power chip connected to the PCH, a basic input output system (BIOS), a control unit, and a power supply. The control unit determines the potential of a PW_OK signal from the PCH power chip to get the current state of the electronic system through the BIOS, thereby determining whether the current status of the PW_OK signal corresponds to a predetermined status of the PCH power chip which is defined in the current state of the electronic system. If the current status of the PW_OK signal does not correspond to the predetermined status, the control unit outputs a system PW_OK signal of low potential to disable the PCH power chip, and outputs an enable signal to the PCH which outputs a PS_ON signal of high potential to the power supply to shutdown the electronic system.

Abstract: A protection circuit for a memory control chip of a computer includes a controller, a switch circuit, a memory control chip, and a delay circuit. The controller outputs a high level control signal when the computer is in a first state, and outputs a low level control signal when the computer is in a second state. The switch circuit connects or disconnects the connection between a power pin of the memory control chip and a power terminal, according to the control signal. The delay circuit imposes a predetermined time delay for receiving a high level control signal, and outputs an enable signal to an enable pin of the memory control chip to make the memory control chip operate again, after a predetermined delay.

Abstract: A power matching system is applied to a central processing unit (CPU) power supply, which includes a power control chip to regulate the frequency of the signal applied to the CPU power supply. The power control chip includes a detecting pin. The power matching system includes a control unit and a control circuit. The control unit includes a platform controller hub (PCH) to obtain information concerning a CPU, a basic input output system (BIOS) to obtain a power rating of the CPU, and an integrated baseboard management controller (IBMC) to output a required signal to the control circuit according to the power rating established. The power control chip receives the required signal from the control circuit and regulates the frequency of the signal applied to the CPU power supply.

Abstract: A motherboard includes a central processing unit (CPU), a drive, and a voltage-state display system to display a voltage mode of the CPU. The voltage-state display system includes a power management chip, a first transistor, a second transistor, a first light emitting diode (LED), and a second LED. A first phase output terminal of the power management chip is connected to the first LED through the first transistor. A second phase output terminal of the power management chip is connected to the second LED through the second transistor. The LEDs indicate the voltage mode of the CPU.

Abstract: The present disclosure provides a circuit protection system and a circuit protection method for an electronic system. The circuit protection system includes a main chip, a power chip powering the main chip, a basic input/output system (BIOS) and a control unit. The control unit detects the potential of a PW_OK signal output from the power chip to the main chip, and gets the current state of the electronic system through the BIOS, thereby determining whether the current state of the main chip corresponds to a predetermined state for the main chip which defined in the current state of the electronic system. If not, the control unit outputs a signal to disable the main chip. The present disclosure disables the main chip instantly when the voltage provided thereto is excessive or insufficient, thereby avoiding the damage caused by excessive or insufficient voltage.

Abstract: A central processing unit (CPU) test system includes a CPU socket, a CPU core controller, and a CPU test device. The CPU core controller stores a start voltage message. The CPU test device includes a voltage detection pin, an analog to digital (A/D) converter, and a microcontroller. The voltage detection pin detects a voltage of an electronic device connected to the CPU socket. The A/D converter converts the detected voltage into a digital signal. The microcontroller controls the CPU core controller to output the start voltage to the CPU socket according to the digital signal. The microcontroller stores a predetermined start voltage message. The microcontroller reads the start voltage message after controlling the CPU core controller to output the start voltage, and determines whether the CPU core controller supplies the start voltage to the CPU socket by comparing the read start voltage message with the predetermined start voltage message.

Abstract: A voltage identification signal control device employed in an electronic device provides a voltage identification signal for a voltage regulation unit. The voltage identification signal control device includes an input unit and a processor. The input unit inputs and sets a predetermined voltage. The processor receives and converts the predetermined voltage from the input unit into a corresponding standard voltage identification signal, and transmits the voltage identification signal to the voltage regulation unit to activate the voltage regulation unit, and the voltage regulation unit outputs a corresponding operating voltage according to the voltage identification signal.

Abstract: A device to measure power consumption includes a processor connected to a central processing unit (CPU) and a memory module, a switch for setting the power measurement device to measure either the power supplied to the CPU or the power supplied to the memory, and a display to show the results of such measurements.

Abstract: A circuit for providing a dummy load includes first to fifth resistors, a comparator, and first to fifth electronic switches. When a power good signal from a power supply is at a low level signal, the first electronic switch is turned off. The second to fourth electronic switches are turned on. The fifth electronic switch is turned off. When the power good signal from the power supply is at a high level signal, the first electronic switch is turned on. The second to fourth electronic switches are turned off. The fifth electronic switch is turned off.

Abstract: A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC power supply is first switched on, and the first MOSFET is switched on to connect the DC power supply to the load when the first charge capacitor is fully charged. The controller regulates resistance of the first potentiometer to regulate a charge time constant of the first charge capacitor, enabling a gradual rise in voltage supplied, from approximately zero to full power, within a desired period of time.

Abstract: A protection circuit includes first and second field-effect transistors (FETs), a bipolar junction transistor, first to sixth resistors, and a first capacitor. The protecting circuit is connected between a power supply unit and a fan, for powering on or powering off the fan.

Abstract: A memory power supply control circuit includes a number of memory slots, a platform controller hub (PCH), a first synchronous rectification driver, a number of second synchronous rectification drivers, and a complex programmable logic device (CPLD). The PCH is connected to the memory slots. The first synchronous rectification driver maintains a working state at all time. The CPLD is connected between the PCH and the second synchronous rectification drivers. The CPLD receives information from the PCH to determine a number of used memory slots, and controls the working states of the second synchronous rectification drivers according to the number of used memory slots.

Abstract: A power supply device for a solid state drive (SSD) inserted into a slot of a computer includes a number of voltage input contacts, a diode, a first voltage regulating module and a second voltage regulating module connected in series. The slot includes a number of voltage output contacts and a number of signal transmitting contacts. The voltage input contacts are connected to the voltage output contacts and selectively connected to the signal transmitting contacts. The voltage input contacts obtains an initial voltage from the slot from the voltage output contacts or the signal transmitting contacts. The first voltage regulating module boosts the initial voltage. The second voltage regulating module regulates the boosted voltage to a preset voltage. The diode prevents a voltage outputting from the voltage input contacts to the signal transmitting contacts.

Abstract: An electronic device with an overclocking mode includes a processor, a memory storing a first range and a second range, and a digital controller which includes a first register, a second register, a monitor module, a determining module, a first writing module, an implementing module, and a second writing module. The monitor module monitors a value of current of the processor. The determining module determines whether the current is within the first range. The first writing module writes the current value in the first register. The implementing module reduces a value from the current value to acquire a new current value. The second writing module writes the new current value in the second register. The processor reads the new current value, detects whether the new current value is within the second range, and keeps itself in the overclocking mode when the new current value is within the second range.

Abstract: A protocol resolution device electrically connected to a central processing unit (CPU) includes a signal controller to receive communication protocol from the CPU, a signal input module, and display module. The signal input module provides an electrical signal to the signal controller. The signal controller decodes the communication protocol from the CPU and stores the decoded communication protocol, the signal controller selectively accesses and calls up the decoded communication protocol according to the electrical signal, and transmits the decoded communication protocol to the display module for display.