Abstract: A power supply and a power control method thereof are provided. The power supply is adapted to be coupled to a load. The power supply includes a battery, an amplifying circuit, and a control circuit. The amplifying circuit receives a load voltage from an output end of the power supply. The amplifying circuit receives a battery voltage from an output end of the battery. When the load is coupled to the output end of the power supply, the amplifying circuit provides a first output voltage according to a voltage difference between the load voltage and the battery voltage. The control circuit controls the battery according to the first output voltage in providing a second output voltage, such that the load is charged at the second output voltage.

Abstract: A power bank charging system is provided and includes a power pin and a data transmission pin through which a charging current is provided to a power bank device, so as to increase a total charging current of the power bank device and thus shorten a charging time of the power bank device.

Abstract: A power supply and a power control method thereof are provided. The power supply is adapted to be coupled to a load. The power supply includes a battery, an amplifying circuit, and a control circuit. The amplifying circuit receives a load voltage from an output end of the power supply. The amplifying circuit receives a battery voltage from an output end of the battery. When the load is coupled to the output end of the power supply, the amplifying circuit provides a first output voltage according to a voltage difference between the load voltage and the battery voltage. The control circuit controls the battery according to the first output voltage in providing a second output voltage, such that the load is charged at the second output voltage.

Abstract: A power bank charging system is provided and includes a power pin and a data transmission pin through which a charging current is provided to a power bank device, so as to increase a total charging current of the power bank device and thus shorten a charging time of the power bank device.

Abstract: A power bank device includes a load node, a power-supply circuit, an output circuit, a detecting unit, and a control circuit. The power-supply circuit provides an output current via the load node. The output circuit generates an output voltage at the load node according to the output current. The detecting unit generates a detecting signal according to the output current. The output circuit includes an impedance circuit. The control circuit, according to the detecting signal, controls the output circuit to switch an impedance of the impedance circuit, thereby down-regulating the output voltage and the output current.

Abstract: The present invention relates to a driving circuit of LED and a driving method thereof, which comprise a converting circuit and a driving unit. The converting circuit receives a pulse-width modulation (PWM) signal and generates an adjusting current according to the PWM signal. The driving unit receives the adjusting current and generates at least a driving current according to the adjusting current for driving a plurality of LEDs coupled to the driving unit. The magnitude of the driving current is adjusted according to the adjusting current. In addition, the driving unit has a bright-controlling pin used for receiving a control signal having a fixed level.

Abstract: The present invention relates to a driving circuit and a driving method for LED. The driving circuit for LED comprises an inductor used for producing an output current, a power switch coupled to the inductor and used for controlling the inductor to transmit the output current to a plurality of LEDs and drive the plurality of LEDs, an adjusting circuit receiving a PWM signal related to the output current, and a driving unit producing an adjusting impedance value according to the PWM signal. The driving unit generates a switching signal according to the adjusting impedance value. The switching signal switches the power switch and enables the inductor to produce the output current. The driving unit adjusts the frequency of the switching signal according to the adjusting impedance value.

Abstract: A power bank device includes a load node, a power-supply circuit, an output circuit, a detecting unit, and a control circuit. The power-supply circuit provides an output current via the load node. The output circuit generates an output voltage at the load node according to the output current. The detecting unit generates a detecting signal according to the output current. The output circuit includes an impedance circuit. The control circuit, according to the detecting signal, controls the output circuit to switch an impedance of the impedance circuit, thereby down-regulating the output voltage and the output current.

Abstract: The present invention relates to a driving circuit and a driving method for LED. The driving circuit for LED comprises an inductor used for producing an output current, a power switch coupled to the inductor and used for controlling the inductor to transmit the output current to a plurality of LEDs and drive the plurality of LEDs, an adjusting circuit receiving a PWM signal related to the output current, and a driving unit producing an adjusting impedance value according to the PWM signal. The driving unit generates a switching signal according to the adjusting impedance value. The switching signal switches the power switch and enables the inductor to produce the output current. The driving unit adjusts the frequency of the switching signal according to the adjusting impedance value.

Abstract: The present invention relates to a driving circuit of LED and a driving method thereof, which comprise a converting circuit and a driving unit. The converting circuit receives a pulse-width modulation (PWM) signal and generates an adjusting current according to the PWM signal. The driving unit receives the adjusting current and generates at least a driving current according to the adjusting current for driving a plurality of LEDs coupled to the driving unit. The magnitude of the driving current is adjusted according to the adjusting current. In addition, the driving unit has a bright-controlling pin used for receiving a control signal having a fixed level.

Abstract: A LED lamp includes a power supply module and a light emitting module. The power supply module comprises a base and a power supply unit. The base comprises a first combination portion, an electrical connection portion and a screw portion disposed between the first combination portion and the electrical connection portion. The power supply unit is disposed in the base and electrically connected to the electrical connection portion. The light emitting module comprises a housing structure and a light emitting circuit. The housing structure comprises a second combination portion. The light emitting circuit is disposed in the housing structure. The second combination portion is configured to be detachably combined with the first combination portion for electrically connecting/detaching the power supply unit to/from the light emitting circuit.

Abstract: A LED driving circuit includes a bridge rectifier, a high-bias-voltage diode, a balancing capacitor, a driving chip, and a switch. The bridge rectifier receives external AC power and outputs a full-wave or half-wave AC power. One terminal of the high-bias-voltage diode and one terminal of the balancing capacitor are electrically coupled to a balancing node. The other terminals of the high-bias-voltage diode and the balancing capacitor are electrically coupled to the bridge rectifier and grounded respectively. The driving chip receives operating power from the balancing node, and outputs driving signals to operate the switch, so as to drive an LED. Through the arrangement of the forward bias voltage direction of the high-bias-voltage diode, the balancing capacitor is only discharged to the driving chip. Therefore, the capacitance value and the volume of the balancing capacitor, the space occupied by the driving circuit, and the cost of the driving circuit are reduced.

Abstract: A LED driving circuit includes a bridge rectifier, a high-bias-voltage diode, a balancing capacitor, a driving chip, and a switch. The bridge rectifier receives external AC power and outputs a full-wave or half-wave AC power. One terminal of the high-bias-voltage diode and one terminal of the balancing capacitor are electrically coupled to a balancing node. The other terminals of the high-bias-voltage diode and the balancing capacitor are electrically coupled to the bridge rectifier and grounded respectively. The driving chip receives operating power from the balancing node, and outputs driving signals to operate the switch, so as to drive an LED. Through the arrangement of the forward bias voltage direction of the high-bias-voltage diode, the balancing capacitor is only discharged to the driving chip. Therefore, the capacitance value and the volume of the balancing capacitor, the space occupied by the driving circuit, and the cost of the driving circuit are reduced.

Abstract: A surge protection device is coupled between a car power source and an output voltage end of a car charger. The surge protection device includes a diode, a current-limiting resistor, and a first transient voltage suppressor (TVS). The diode has an anode coupled to the car power source and a cathode coupled to the car charger. The current-limiting resistor has one end coupled to the anode of the diode. The first TVS is connected to the current-limiting resistor in series, and is connected in parallel with the current-limiting resistor between the car power source and the car charger. A reverse breakdown voltage of the first TVS should be smaller than a reverse breakdown voltage of the diode.

Abstract: A liquid crystal display (LCD) television (TV) power supply circuit is split into a backlight module power supply sub-circuit and a TV circuit power supply sub-circuit, wherein the backlight module power supply sub-circuit supplies an operation voltage to a backlight module of the LCD TV and the TV circuit power supply sub-circuit supplies plural operation voltages for a TV circuit of the LCD TV. The backlight module power supply sub-circuit includes a power factor correction circuit and an inverter, and the TV circuit power supply sub-circuit includes a DC/DC converter. The backlight module power supply sub-circuit and the TV circuit power supply sub-circuit may share a common rectifier circuit or they can be provided with direct current powers by respective rectifiers.

Abstract: A peripheral device for computers or similar electronic devices includes a combination of a cursor controller, such as computer mouse, including a displaceable casing and a numeric keypad having at least one functional key and a plurality of numeric keys formed on a surface of the casing. A displacement detection mechanism is arranged inside the casing to detect the displacement of the casing. A control circuit converts the detected displacement into displacement signals transmitted through a cable or a wireless communication device to a computer, which in turn controls the movement of a screen cursor. The control circuit is reversibly switchable from the cursor control mode into a keypad mode in which the control circuit receives actuation of the keys and applies corresponding signals to the computer device.