Abstract: A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU.

Abstract: A charging indication apparatus and a method thereof are provided. A switching signal for controlling an operation frequency of a power conversion circuit is divided to obtain a divided frequency signal, and according to the divided frequency signal, a backlight module is controlled to emit a backlight source serving as a charging indication signal.

Abstract: A charging indication apparatus and a method thereof are provided. A switching signal for controlling an operation frequency of a power conversion circuit is divided to obtain a divided frequency signal, and according to the divided frequency signal, a backlight module is controlled to emit a backlight source serving as a charging indication signal.

Abstract: A hub apparatus for USB and a power management method thereof are provided. The hub apparatus includes at least one USB-PD port, at least one USB port and a control unit. The control unit detects whether the USB-PD port is connected to a first external device and whether the USB port is contacted to a second external device respectively. When the at least one first external device complies with a USB-PD interface and a connecting situation of the at least one first external device and the at least one second external device are changed, the control unit determines a required power supply determination value according to the connecting situation of the at least one first external device and the at least one second external device, and accordingly, the control unit communicates with the first external device to set a power transmission profile of the at least one USB-PD port.

Abstract: A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU.

Abstract: A electronic device and a power supplying method thereof are provided. The device includes a system unit, an internal power supplying unit and a power controller. The internal power supplying unit is coupled to the system unit, and supplies a system voltage to the system unit. The power controller is coupled to the system unit and the internal power supplying unit, and determines a source of the external voltage according to a voltage value of the external voltage. When the power controller determines that the source of the external voltage is a mobile power supply device, the power controller provides the external voltage to the system unit, and does not charge the internal power supplying unit with the external voltage. The voltage value of the external voltage provided by the mobile power supply device is higher than the voltage value of the system voltage.

Abstract: A method for adjusting a system performance of a portable electronic device is disclosed. The portable electronic device is connected to a power adapter for obtaining external power supply. The method comprises the steps of: receiving a voltage signal outputted from the power adapter; determining whether to execute an over current protection by the power adapter; calculating a recovering time of the voltage signal if the over current protection is executed by the power adapter, wherein the recovering time is a time period from stopping an output of the voltage signal to restarting the output thereof; and determining an output power of the power adapter to adjust the system performance of the portable electronic device according to the recovering time.

Abstract: A method for adjusting a system performance of a portable electronic device is disclosed. The portable electronic device is connected to a power adapter for obtaining external power supply. The method comprises the steps of: receiving a voltage signal outputted from the power adapter; determining whether to execute an over current protection by the power adapter; calculating a recovering time of the voltage signal if the over current protection is executed by the power adapter, wherein the recovering time is a time period from stopping an output of the voltage signal to restarting the output thereof; and determining an output power of the power adapter to adjust the system performance of the portable electronic device according to the recovering time.

Abstract: An electronic device and an external power supply device control method applicable to the electronic device are disclosed. The electronic device is electrically connected to an external power supply device that is able to switch between an ON state and an OFF state. The electronic device includes a switch module and an internal power module. The switch module, when being triggered, generates a switch signal. The internal power module receives the switch signal and accordingly generates a trigger signal to the external power supply device, so that the external power supply device is triggered to switch from the OFF state to the ON state and accordingly supplies electric power to the electronic device.

Abstract: A battery charging method and device thereof are disclosed. The method includes the following steps. First, a charging current is supplied into a plurality of cell blocks of a battery module for charging, and the terminal voltages of the cell blocks are detected, when one of said terminal voltages exceeds a first threshold, the charging is kept continuously over a first preset time period. If one of said terminal voltages of said cell blocks exceeds a second threshold, an over voltage protection is performed, else the charging current is reduced and the battery module is charged by the reduced charging current continuously over a second preset time period and if the cell blocks are determined that they are fully charged, the charging is stopped, otherwise, the battery module is charged continuously. Therefore, the battery charging method and device thereof in accordance with the present invention can prevent the battery module from being overcharged and prolong its life.

Abstract: A power management system for use in a laptop computer and its power management method include an external power apparatus and a control unit and a switch disposed in the laptop computer. The external power apparatus is pluggable and supplies direct current (DC) between 5 and 1.8 DC voltages to the laptop computer. The switch can turn on/off the direct current to at least one DC voltage point within the laptop computer based on a control signal sent from the control unit.

Abstract: An electronic device and an external power supply device control method applicable to the electronic device are disclosed. The electronic device is electrically connected to an external power supply device that is able to switch between an ON state and an OFF state. The electronic device includes a switch module and an internal power module. The switch module, when being triggered, generates a switch signal. The internal power module receives the switch signal and accordingly generates a trigger signal to the external power supply device, so that the external power supply device is triggered to switch from the OFF state to the ON state and accordingly supplies electric power to the electronic device.

Abstract: The present invention discloses an audio signal processing device capable of transmitting at least one audio signal generated by an audio decoder to at least one first speaker and a second speaker. The audio signal processing device includes a signal mixer and at least one filter. By the at least one filter, a first signal having a frequency larger than a first specific frequency in each audio signal is transmitted to at least one first speaker, and a second signal having a frequency smaller than the first specific frequency in each audio signal is transmitted to the signal mixer and then transmitted to the second speaker.

Abstract: A battery charging method and device thereof are disclosed. The method includes the following steps. First, a charging current is supplied into a plurality of cell blocks of a battery module for charging, and the terminal voltages of the cell blocks are detected, when one of said terminal voltages exceeds a first threshold, the charging is kept continuously over a first preset time period. If one of said terminal voltages of said cell blocks exceeds a second threshold, an over voltage protection is performed, else the charging current is reduced and the battery module is charged by the reduced charging current continuously over a second preset time period and if the cell blocks are determined that they are fully charged, the charging is stopped, otherwise, the battery module is charged continuously. Therefore, the battery charging method and device thereof in accordance with the present invention can prevent the battery module from being overcharged and prolong its life.

Abstract: A power management system for use in a laptop computer and a power management method are disclosed. The power management system includes an external power apparatus and a control unit and a switch disposed in the laptop computer. The external power apparatus is pluggable and supplies direct current (DC) between 5 and 1.8 DC voltages to the laptop computer. The switch can turn on/off the direct current to at least one DC voltage point within the laptop computer based on a control signal sent from the control unit.

Abstract: A power control system used in a computer system includes decision logic for outputting a decision voltage based on detection of an operational state of the computer system. The power control system includes a voltage control unit, having at least two resistors and a switch, for outputting a set voltage based on an on and off state of the switch determined by the decision voltage. A power supply circuit provides an output voltage to the computer system based on the set voltage.

Abstract: A power management system for controlling power of a portable computer has an AC/DC adapter, a current sensor for sensing an output current of the AC/DC adapter, a comparator for comparing the output current with a reference current, and a logic circuit. If the output current is greater than the reference current, the comparator outputs an alarm signal. The logic circuit analyzes the alarm signal. If the alarm signal conforms to a predetermined standard, the logic circuit controls operations of the portable computer to reduce the power of the portable computer received from the AC/DC adapter.