Abstract: An Ethernet power supply receives a DC voltage through a bus positive terminal and a bus negative terminal, and is coupled to a load device. The Ethernet power supply includes a first control module and a second control module. The first control module is used to provide a first control signal through the bus negative terminal to confirm whether the load device is a valid load. The second control module is used to connect or disconnect a coupling relationship between the bus positive terminal and the first control module according to the load device being connected or not.

Abstract: An Ethernet power supply receives a DC voltage through a bus positive terminal and a bus negative terminal, and is coupled to a load device. The Ethernet power supply includes a first control module and a second control module. The first control module provides a first control signal through the bus negative terminal to confirm whether the load device is a valid load. The second control module is used to connect or disconnect a coupling relationship between the bus positive terminal and the first control module according to whether the load device is connected to the Ethernet power supply.

Abstract: An Ethernet power supply receives a DC voltage through a bus positive terminal and a bus negative terminal, and is coupled to a load device. The Ethernet power supply includes a first control module and a second control module. The first control module is used to provide a first control signal through the bus negative terminal to confirm whether the load device is a valid load. The second control module is used to connect or disconnect a coupling relationship between the bus positive terminal and the first control module according to the load device being connected or not.

Abstract: An Ethernet power supply receives a DC voltage through a bus positive terminal and a bus negative terminal, and is coupled to a load device. The Ethernet power supply includes a first control module and a second control module. The first control module provides a first control signal through the bus negative terminal to confirm whether the load device is a valid load. The second control module is used to connect or disconnect a coupling relationship between the bus positive terminal and the first control module according to whether the load device is connected to the Ethernet power supply.

Abstract: A power source device coupled to a power device includes an output port and a controller. When the output port is coupled to a connection cable, the controller is activated to generate a handshake signal, so as to communicate with the power device. When it is determined that the power device is able to be powered according to the handshake signal, the controller controls the power supply device to power the power device through the connection cable. When the connection cable is not coupled to the output port, the controller is deactivated and thus the handshake signal is not generated.

Abstract: A power source device coupled to a power device includes an output port and a controller. When the output port is coupled to a connection cable, the controller is activated to generate a handshake signal, so as to communicate with the power device. When it is determined that the power device is able to be powered according to the handshake signal, the controller controls the power supply device to power the power device through the connection cable. When the connection cable is not coupled to the output port, the controller is deactivated and thus the handshake signal is not generated.

Abstract: A power converting device includes an AC/DC converter, a switch, and a controlling unit. The AC/DC converter converts AC power into a DC voltage, and provides the DC voltage to a load. The switch is coupled to a backup power source. The controlling unit receives the DC voltage. If the DC voltage is less than a predetermined voltage or a decrease of the DC voltage is greater than a predetermined percentage of the DC voltage and the controlling unit receives a voltage command signal of the backup power source, the controlling unit turns on the switch for providing the backup power source to the load.

Abstract: A judgement unit applied in a Power over Ethernet (PoE) device is disclosed herein. The judgement unit is configured to determine whether the PoE device is coupled to a load. If the judgement unit determines that the PoE device is not coupled to the load, a definite time handshaking activation signal is outputted for activating a definite time handshaking communication mode of the PoE device so as to communicate with the load in a definite time handshaking manner.

Abstract: A control system is provided for controlling an electrically operated device. The control system includes a first control box and a second control box. The first control box is equipped with a single button. In case that an input power is normally received and the button is pressed, a pairing process is performed. In case that the input power is interrupted, the second control box is in an emergency mode.

Abstract: A power converting device includes an AC/DC converter, a switch, and a controlling unit. The AC/DC converter converts AC power into a DC voltage, and provides the DC voltage to a load. The switch is coupled to a backup power source. The controlling unit receives the DC voltage. If the DC voltage is less than a predetermined voltage or a decrease of the DC voltage is greater than a predetermined percentage of the DC voltage and the controlling unit receives a voltage command signal of the backup power source, the controlling unit turns on the switch for providing the backup power source to the load.

Abstract: A power conversion device is disclosed herein. The power conversion device includes an AC-DC conversion unit, a switching unit and a bypass circuit. The AC-DC conversion unit is configured to receive an AC input voltage via a power input terminal, and output a DC output voltage to a power output terminal according to the AC input voltage. The switching unit is configured to be switched off according to the AC input voltage received from the power input terminal, and to be switched on according to a DC input voltage received from the power input terminal. The bypass circuit is configured to receive the DC input voltage via the switching unit, and output the DC output voltage to the power output terminal according to the DC input voltage.

Abstract: A control system is provided for controlling an electrically operated device. The control system includes a first control box and a second control box. The first control box is equipped with a single button. In case that an input power is normally received and the button is pressed, a pairing process is performed. In case that the input power is interrupted, the second control box is in an emergency mode.

Abstract: A power conversion device is disclosed herein. The power conversion device includes an AC-DC conversion unit, a switching unit and a bypass circuit. The AC-DC conversion unit is configured to receive an AC input voltage via a power input terminal, and output a DC output voltage to a power output terminal according to the AC input voltage. The switching unit is configured to be switched off according to the AC input voltage received from the power input terminal, and to be switched on according to a DC input voltage received from the power input terminal. The bypass circuit is configured to receive the DC input voltage via the switching unit, and output the DC output voltage to the power output terminal according to the DC input voltage.

Abstract: The present invention is associated with a power adapter capable of simultaneously providing a low-level DC voltage and a high-level DC voltage. The power adapter includes a transformer having a primary winding for storing energy when a main switch coupled therewith is turned on and transferring the stored energy to the secondary side of the transformer when the main switch is turned off. The transformer includes a first secondary winding and a second secondary winding connected in series with each other. A first rectifier/filter circuit is connected across the first secondary winding for generating a low-level DC voltage by rectifying and filtering the energy received by the first secondary winding, and a second rectifier/filter circuit is connected across the first secondary winding and the second secondary winding for generating a high-level DC voltage by rectifying and filtering the energy received by the first secondary winding and the second secondary winding.

Abstract: The present invention is associated with a power adapter capable of simultaneously providing a low-level DC voltage and a high-level DC voltage. The power adapter includes a transformer having a primary winding for storing energy when a main switch coupled therewith is turned on and transferring the stored energy to the secondary side of the transformer when the main switch is turned off. The transformer includes a first secondary winding and a second secondary winding connected in series with each other. A first rectifier/filter circuit is connected across the first secondary winding for generating a low-level DC voltage by rectifying and filtering the energy received by the first secondary winding, and a second rectifier/filter circuit is connected across the first secondary winding and the second secondary winding for generating a high-level DC voltage by rectifying and filtering the energy received by the first secondary winding and the second secondary winding.

Abstract: An A/D converter with adjustable internal connection and a method for operating the same are provided. The A/D converter comprises: a plurality of piezo-transforming devices for detecting an input voltage from the alternating current source and adjusting an connection of input terminals of the plurality of piezo-transforming devices based on the input voltage to obtain an input/output voltage ratio of the plurality of piezo-transforming devices inversely proportional to the input voltage.

Abstract: A single stage AC/DC converter with piezo transformer is provided. The AC/DC converter is suitable for converting an AC power into a DC power and is comprised of a rectification module, a switching module, a driving module, a piezo transformer, and an output rectification module. The present invention provides a new AC/DC converter with piezo transformer by combining the bulk circuit and the half-bridge circuit together.

Abstract: A single stage A/D converter with piezo transformer is provided. The A/D converter is suitable for converting an AC power into a DC power and is comprised of a rectification module, a switching module, a driving module, a piezo transformer, and an output rectification module. The present invention provides a new A/D converter with piezo transformer by combining the bulk circuit and the half-bridge circuit together.

Abstract: An A/D converter with adjustable internal connection and a method for operating the same are provided. The A/D converter comprises: a plurality of piezo-transforming devices for detecting an input voltage from the alternating current source and adjusting an connection of input terminals of the plurality of piezo-transforming devices based on the input voltage to obtain an input/output voltage ratio of the plurality of piezo-transforming devices inversely proportional to the input voltage.