Abstract: A power management device and a management method thereof are provided. The power management device includes a switch, a detection circuit and a controller. The switch receives an external power. The detection circuit receives an internal power and at least one operation power. The detection circuit determines whether at least one of the internal power and the operation power is in a preset specification range or not to generate a protection activate signal. The controller sets a protection flag according to the protection activate signal, and generates a control signal according to the protection flag by executing an application program. The controller transmits the control signal to turn off the switch.

Abstract: A power system includes a control circuit, a power conversion circuit, a current detection circuit and a overheat detection circuit. The control circuit is for generating one or more pulse signal. The power conversion circuit is electrically coupled to the control circuit, for generating an output current according to the pulse signal. The current detection circuit is electrically coupled to the power conversion circuit, for generating a sensing current according to the output current. The overheat detection circuit is electrically coupled to the current detection circuit and the control circuit, for generating the correction current according to a temperature of the power conversion circuit. The control circuit adjusts a duty ratio of the pulse signal according to a correction sensing current to adjust the output current, and the correction sensing current is a sum of the value of the sensing current and the correction current.

Abstract: A voltage conversion apparatus includes a power supply circuit with a first switch, a voltage conversion circuit, and a protective circuit with a detection circuit. The first switch transmits a power to generate an input voltage. The voltage conversion circuit generates a first voltage. A second switch of the voltage conversion circuit receives the input voltage. A third switch of the voltage conversion circuit is coupled between the second switch and a ground terminal. The detection circuit generates a first control signal based on the first voltage, a second voltage that corresponds to the first voltage, and a reference voltage. When a voltage value of an error signal is less than the reference voltage, the detection circuit outputs the first control signal to turn off the first switch. The voltage value of the error signal corresponds to a voltage difference between the first voltage and the second voltage.

Abstract: A power conversion circuit includes a voltage regulator circuit and a detection circuit. The voltage regulator circuit includes a first switch and a second switch. A first end of the first switch receives an input voltage, and a control end of the first switch receives a first drive signal. The second switch is coupled between a second end of the first switch and the ground, and is turned on or off based on a second drive signal. The first switch and the second switch regulate the input voltage to output an output voltage. The detection circuit is configured to determine whether the first switch is short-circuited or not based on a voltage level of at least one of the first end, the second end, or the control end of the first switch, and adjust the second drive signal when the first switch is short-circuited, to turn on the second switch.

Abstract: An electronic device and a method for controlling power supply are provided. The electronic device includes a first transmission port, a second transmission port, a switching power circuit and a control unit. The first transmission port is connected to a first external device, and the second transmission port is connected to a second external device. The switching power circuit is coupled to the first transmission port, the second transmission port and the power storage unit. The control unit controls the switching power circuit according to the voltage level of the first detecting pin of the first transmission port and the voltage level of the second detecting pin of the second transmission port, so as to make the first external device and the second external device to transmit power to the power storage unit.

Abstract: A power system includes a control circuit, a power conversion circuit, a current detection circuit and a overheat detection circuit. The control circuit is for generating one or more pulse signal. The power conversion circuit is electrically coupled to the control circuit, for generating an output current according to the pulse signal. The current detection circuit is electrically coupled to the power conversion circuit, for generating a sensing current according to the output current. The overheat detection circuit is electrically coupled to the current detection circuit and the control circuit, for generating the correction current according to a temperature of the power conversion circuit. The control circuit adjusts a duty ratio of the pulse signal according to a correction sensing current to adjust the output current, and the correction sensing current is a sum of the value of the sensing current and the correction current.

Abstract: A voltage conversion apparatus includes a power supply circuit with a first switch, a voltage conversion circuit, and a protective circuit with a detection circuit. The first switch transmits a power to generate an input voltage. The voltage conversion circuit generates a first voltage. A second switch of the voltage conversion circuit receives the input voltage. A third switch of the voltage conversion circuit is coupled between the second switch and a ground terminal. The detection circuit generates a first control signal based on the first voltage, a second voltage that corresponds to the first voltage, and a reference voltage. When a voltage value of an error signal is less than the reference voltage, the detection circuit outputs the first control signal to turn off the first switch. The voltage value of the error signal corresponds to a voltage difference between the first voltage and the second voltage.

Abstract: A power supply protection device including a driving circuit, a logic control unit and a protection module is provided. The driving circuit adjusts an external voltage according to a first driving signal and a second driving signal and outputs a driving voltage. The logic control unit generates the first driving signal and the second driving signal according to a protection signal and a pulse signal. The protection module outputs a plurality of test currents orderly to detect a plurality of impedances of the driving circuit before the driving circuit receives the external voltage, generates a plurality of voltage signals according to the impedances and compares the voltage signals with a plurality of reference voltages to generate the protection signal. A power supply protecting method for protecting a driving circuit is also provided.

Abstract: A power conversion circuit includes a voltage regulator circuit and a detection circuit. The voltage regulator circuit includes a first switch and a second switch. A first end of the first switch receives an input voltage, and a control end of the first switch receives a first drive signal. The second switch is coupled between a second end of the first switch and the ground, and is turned on or off based on a second drive signal. The first switch and the second switch regulate the input voltage to output an output voltage. The detection circuit is configured to determine whether the first switch is short-circuited or not based on a voltage level of at least one of the first end, the second end, or the control end of the first switch, and adjust the second drive signal when the first switch is short-circuited, to turn on the second switch.

Abstract: An electronic device and a power protection method are provided. The electronic device includes a transfer port, a switch, a first detecting unit and a second detecting unit. The transfer port provides a driving voltage to an external device. The switch is coupled between the transfer port and a supply power source, and the switch is selectively turned off according to at least one of a first control signal and a second control signal. The first detecting unit generates the first control signal when a voltage drop of the driving voltage exceeds a threshold voltage. The second detecting unit generates a sampling voltage by detecting the driving voltage and generates the second control signal when the sampling voltage is lower than a first reference voltage. The electronic device can provide a power protection when an external device is plugged in/out the transfer port.

Abstract: A driving circuit for providing a driving voltage to a first flash light-emitting diode is provided. The driving circuit includes an inductor, a first switch, a second switch, a capacitor, a third switch, a fourth switch and a control unit. The control unit controls operating modes of the inductor and the capacitor to a boost mode or a buck mode according to a driving mode of the first flash light-emitting diode, and determines whether to switch the operating modes of the inductor and the capacitor according to a first driving current flowing through the first flash light-emitting diode. An operating method for the driving circuit is also provided.

Abstract: A dimming control circuit for adjusting brightness of a light-emitting component is provided. The dimming control circuit includes a driving transistor, an amplifier and a control circuit. The driving transistor is coupled to the light-emitting component The amplifier includes a first input terminal and an output terminal. The output terminal is coupled to a gate of the driving transistor. The control circuit is coupled to the amplifier. The control circuit generates a second analog signal to the first input terminal of the amplifier according to a first analog signal. A slew rate of the second analog signal below the slew rate of the first analog signal and the amplifier controls the driving transistor to adjust a driving current flowing through the light-emitting component according to the second analog signal.

Abstract: A dimming control circuit for adjusting brightness of a light-emitting component is provided. The dimming control circuit includes a driving transistor, an amplifier and a control circuit. The driving transistor is coupled to the light-emitting component The amplifier includes a first input terminal and an output terminal. The output terminal is coupled to a gate of the driving transistor. The control circuit is coupled to the amplifier. The control circuit generates a second analog signal to the first input terminal of the amplifier according to a first analog signal. A slew rate of the second analog signal below the slew rate of the first analog signal and the amplifier controls the driving transistor to adjust a driving current flowing through the light-emitting component according to the second analog signal.

Abstract: An adaptive power-switch circuit suitable for an electronic device includes a multi-gate power switch module, a monitoring module and a driving controller circuit. The multi-gate power switch module includes to plurality of power switch units connected in parallel. The power switch units include a gate control terminal respectively. The monitoring module is used to monitor an operating load of the electronic device. The driving control circuit is coupled to the monitoring module to selectively disable the gate controlling terminals to form a plurality of configurations. The driving control circuit selects one of the configurations to operate the multi-gate power switch module according to the operating load.

Abstract: A driving circuit for providing a driving voltage to a first flash light-emitting diode is provided. The driving circuit includes an inductor, a first switch, a second switch, a capacitor, a third switch, a fourth switch and a control unit. The control unit controls operating modes of the inductor and the capacitor to a boost mode or a buck mode according to a driving mode of the first flash light-emitting diode, and determines whether to switch the operating modes of the inductor and the capacitor according to a first driving current flowing through the first flash light-emitting diode. An operating method for the driving circuit is also provided.

Abstract: A power supply protection device including a driving circuit, a logic control unit and a protection module is provided. The driving circuit adjusts an external voltage according to a first driving signal and a second driving signal and outputs a driving voltage. The logic control unit generates the first driving signal and the second driving signal according to a protection signal and a pulse signal. The protection module outputs a plurality of test currents orderly to detect a plurality of impedances of the driving circuit before the driving circuit receives the external voltage, generates a plurality of voltage signals according to the impedances and compares the voltage signals with a plurality of reference voltages to generate the protection signal. A power supply protecting method for protecting a driving circuit is also provided.

Abstract: An electronic device and a method for controlling power supply are provided. The electronic device includes a first transmission port, a second transmission port, a switching power circuit and a control unit. The first transmission port is connected to a first external device, and the second transmission port is connected to a second external device. The switching power circuit is coupled to the first transmission port, the second transmission port and the power storage unit.

Abstract: A graphic card with multiple fans and a controlling method thereof are provided. In the controlling method, the temperature of a first component and a second component of the graphic card is detected. A rotating speed of a first fan of the graphic card is adjusted according to the temperature of the first component. The rotating speed of the second fan of the graphic card is adjusted according to the temperature of the second component or the temperature of the first component and the second component.

Abstract: An electronic device and a power protection method are provided. The electronic device includes a transfer port, a switch, a first detecting unit and a second detecting unit. The transfer port provides a driving voltage to an external device. The switch is coupled between the transfer port and a supply power source, and the switch is selectively turned off according to at least one of a first control signal and a second control signal. The first detecting unit generates the first control signal when a voltage drop of the driving voltage exceeds a threshold voltage. The second detecting unit generates a sampling voltage by detecting the driving voltage and generates the second control signal when the sampling voltage is lower than a first reference voltage. The electronic device can provide a power protection when an external device is plugged in/out the transfer port.

Abstract: A switching power supply circuit is disclosed in an embodiment. The switching power supply circuit includes a power output stage, a pulse width modulation (PWM) signal generator, a compensation module, and a overshooting protection module. The power output stage is used for generating an output signal to drive a load device. The PWM signal generator generates a pulse width modulation (PWM) signal which is used for controlling the power output stage. The compensation module is used for generating a compensation signal to the PWM signal generator according to the output signal. The overshooting protection module receives the output signal to enable or disable the PWM signal generator.