Abstract: A ground point fixing device for a power supply module includes an engaging part and a fastening part. The engaging part includes an engaging body, a joining portion and an engaging portion. The engagement body has a body outer diameter and a body surface larger than a grounding hole on a power supply module circuit board. The joining portion is disposed on the body surface and has a joining portion outer diameter smaller than the grounding hole. The engagement portion is disposed on the body surface and around an outer circumference of the joining portion. The joining portion is passed through the grounding hole to be connected to the fastening part, so that the engagement portion of the engaging part is engaged in the grounding hole, and the fastening part and the engagement body of the engaging part are respectively fixed on an upper surface and a lower surface of the circuit board.

Abstract: A liquid cooling structure for being used in an electronic device is configured to wrap a heat-generating component and has a cooling plate and a circuit board. The cooling plate and the circuit board is arranged to form a space for accommodating the heat-generating component. The space is filled with a first thermal conductive medium, which is in direct contact with the cooling plate, the circuit board and the heat-generating component. A structure and assembling processes of the liquid cooling structure are simplified. Accordingly, sizes of the liquid cooling structure and the electronic device having the liquid cooling structure are also reduced.

Abstract: A power redundant system and its protection circuit is configured to have a second circuit unit receiving electricity from a first circuit unit through a power loop. An isolation switch is connected in series with the power loop. An electrical detection unit connects to the power loop to detect electrical changes and accordingly output a voltage signal to a processing unit. A first switch unit is connected in parallel to the first circuit unit and the second circuit unit. When the isolation switch is controlled to be turned off, the processing unit controls a conduction state of the first switch unit for allowing the voltage signal to change in response to the conduction state of the first switch unit. When the processing unit determines that a signal feature of the voltage signal mismatches with an isolation characteristic, the isolation switch is determined to be abnormal with an electrical leakage.

Abstract: The present invention discloses a power supply and a control method thereof. The power supply comprises a power conversion unit, a current sampling circuit, and a signal comparison unit. The power conversion unit converts a power source based on an input power source, generates an output current, has a power source output terminal, and outputs the output current from the power source output terminal. The current sampling circuit samples a transient variation of the output current and to generate an output voltage difference signal corresponding to the transient variation. The signal comparison unit is electrically connected to the current sampling circuit, receives the output voltage difference signal, and compares the output voltage difference signal with a predetermined voltage value. When the output voltage difference signal is greater than or equal to the predetermined voltage value, the signal comparison unit generates a dynamic compensating command.

Abstract: A bidirectional power converter has a dual active bridge (DAB) converter circuit and a power storage unit. The DAB converter circuit includes a primary bridge circuit, a secondary bridge circuit, a primary power storage element, and a transformer. The power storage element is connected to a primary coil or a secondary coil of the transformer in series. The power storage unit is connected to the primary coil or the secondary coil in parallel. The primary bridge circuit and the secondary bridge circuit are operated in a zero-voltage-switching (ZVS) zone, and an impedance value of the power storage unit corresponds to a size of the ZVS zone.

Abstract: A heat dissipating structure of a power supply is disposed on an inner side of a casing and has two heat dissipating covers configured to be connected with each other, and a heat dissipating sleeve annularly mounted on and around the two heat dissipating covers and disposed between the heat dissipating covers and the casing. The heat dissipating sleeve is able to be bent according to an internal structure of the casing for attaching to the casing and increasing contact area between the heat dissipating sleeve and the casing. The heat from an interior of the power supply can be conducted to the two heat dissipating covers for a first heat spreading and then to the heat dissipating sleeve for a second heat spreading. Thus, speed of heat dissipation to an exterior of the casing can be increased and temperature inside the power supply can be effectively reduced.

Abstract: A power supply has a housing, a circuit board, a wire, and a wire securing assembly. The wire securing assembly has a base plate and a securing structure. The securing structure has a first plate and a second plate. A side edge of the first plate is connected to the base plate. The second plate is spaced apart from the first plate. The wire is mounted through and between the first plate and the second plate. The wire securing assembly is modified from the current insulating part, in which the original side plate extends and forms an additional part, or a bent structure is added on the original side plate, and thus the additional structures become the securing structure. Thus, the wire is prevented from moving under vibration or external force and contacting the blades of the fan, or keeps in a position in compliance with safety requirements.

Abstract: A current sampling circuit for a bridgeless power factor corrector is provided. The current sampling circuit comprises a sampling resistor, a first and second current sampling modules. In the first and second current sampling modules, primary windings of transformers are respectively serially connected to a first and second fast switches of the bridgeless power factor corrector. In a positive half cycle of the AC power, a second sampled current phase switching unit is turned on to form a second sampling circuit, and a first main current freewheeling unit is turned on to form a freewheeling path of a first transformer. In a negative half cycle of the AC power, a first sampled current phase switching unit is turned on to form a first sampling circuit, and a second main current freewheeling unit is turned on to form a freewheeling path of a second transformer.

Abstract: A power supply having ORing MOSFETs mounts a voltage regulating unit between a main power module and an auxiliary power module of a secondary side of the power supply. The voltage regulating unit regulates a control voltage received by a driving unit, such that a voltage difference between a gate voltage and a source voltage of one of the ORing MOSFETs can be less than a rated voltage threshold for avoiding damaging the one ORing MOSFET.

Abstract: A power-saving charging device controls both a primary side controller and a secondary side controller to be in a shutdown state when an output terminal is not connected to the load. When the output terminal is connected to the load, the secondary side controller receives a power-on power supply from a power storage unit, performs a power-on procedure and enters a working state. The primary side controller receives a power-on signal from the power storage unit, performs the power-on procedure according to the power-on signal, and enters the working state. Accordingly, when the charging device is not connected to the load, it can enter a standby state with extremely low power consumption in which the primary side controller and the secondary side controller are both turned off, thereby achieving the effect of saving the power consumption of the controller when the charging device is in standby.

Abstract: A D-mode GaN transistor synchronous rectifier of the present invention includes a power switching module, a peak detection module, and a gate driver module. The peak detection module stores energy when the negative end of the secondary side winding of the power converter is at a high voltage. The power switching module includes a first switch and a D-mode GaN HEMT as a second switch connected in series. The energy is provided to the module gate of the power switching module through the gate driver module to keep the first switch turned on. The gate driver module conducts the module gate and the module source when the positive end of the secondary side winding is at a low voltage, such that a clamp circuit pulls the gate-source voltage of the second switch below threshold and turns it off. The synchronous rectifier replaces conventional diode rectifier, having lower conduction loss and response ringing.

Abstract: A power converter with an adjustable output voltage has an isolation DC/DC transformer, a primary side circuit connected to a primary coil of the isolation DC/DC transformer for transmitting an input AC power to the primary coil, and a secondary side circuit connected to a secondary coil of the isolation DC/DC transformer. The secondary side circuit includes a first output loop, a second output loop and a mode switch connected in the first output loop. When power consumption of a load is low, the mode switch is turned off to interrupt the first output loop so that the secondary side circuit generates a first output voltage with a low voltage level. When power consumption of a load is high, the mode switch is turned on and the secondary side circuit generates a second output voltage with a high voltage level. Without greatly increasing circuits, the power converter achieves wide-range voltage regulation.

Abstract: The power supply device with multiple outputs includes two output ports, a power converting module with two power output ends, and two switching modules connected among the two power output ends and the two output ports. The output power from the two power output ends can be independently allocated to either one or two of the two second output ports. When one of the output ports requests for a demand power, the power supply device is able to determine which one or both of the power output ends to output power to the output port, reaching a better power allocation efficiency.

Abstract: A power supply having a bidirectional gate driving impulse transformer. The power supply includes a transformer, a first Buck converter, the bidirectional gate driving impulse transformer, a primary side controller, a secondary side controller, a first optocoupler, and a second optocoupler; the transformer voltage-transforms a power input from a power inlet and generates an output voltage; the first Buck converter bucks the power input from the power inlet and generates a power voltage; the bidirectional gate driving impulse transformer is powered by either the output voltage or the power voltage; the primary side controller is powered by the power voltage, and the secondary side controller is powered by the output voltage; wherein the bidirectional gate driving impulse transformer drives the transformer according to either a primary side control signal from the primary side controller or a secondary side control signal from the secondary side controller.

Abstract: A power supply includes a transformer, a first Buck converter, a bidirectional gate driving impulse transformer, a primary side controller, a secondary side controller, a first optocoupler, and a second optocoupler; the transformer voltage-transforms a power input from a power inlet and generates an output voltage; the first Buck converter bucks the power input from the power inlet and generates a power voltage; the bidirectional gate driving impulse transformer is powered by either the output voltage or the power voltage; the primary side controller is powered by the power voltage, and the secondary side controller is powered by the output voltage; wherein the bidirectional gate driving impulse transformer drives the transformer according to either a primary side control signal from the primary side controller or a secondary side control signal from the secondary side controller.

Abstract: A power supply device with improved current balancing mechanism includes a power supply module, and a current detecting module detecting the output current to generate a sample voltage. A compensation voltage is provided that is in superposition with the sample voltage to synthesizes a corrected sample voltage, and a current mirror unit receives the corrected sample voltage at a first end. A positive input end of a comparator unit is connected to a second end of the current mirror unit, and is connected to the first end through a voltage divider, while the comparator unit outputs the current share voltage under negative feedback control. The current share output is corrected by compensating the sampling voltage and reflecting it by a current mirror with a certain ratio, the inconvenience of manually adjusting variable resistor, or the problem of temperature influenced BJT and MOSFET, or phase delay of digital sampling is solved.

Abstract: A power supply device has a first output port, a second output port and a power delivery control module. The power delivery control module compares the first output voltage value and the second output voltage value to determine a reference voltage value, and determines the optimized voltage value according to the total output power value, the reference voltage value, and a rated output current of an AC/DC converting module. The power delivery control module controls the AC/DC converting module to convert the AC input voltage to an optimized voltage, so that when the first and second DC/DC converting modules receive the optimized voltage and convert it to the first and second output voltages respectively, the voltage drop is reduced, the conversion loss is reduced, and the conversion efficiency of the power supply device is improved.

Abstract: An integrated driving module includes an oscillator, a PWM unit, a soft start controller, a first driver, and a second driver. The oscillator is connected to a voltage input end and generates an oscillating signal. The PWM unit receives the oscillating signal and generates a first driving control signal and a second driving control signal that are respectively anti-phased. The first driver outputs a first driving output signal to a first output end according to the first driving control signal. The second driver outputs the second driving output signal to a second output end according to the second driving control signal. The integrated driving module only has four connection ends for external connection to provide the two anti-phase driving output signals, such that the circuit design and connection of the primary side of the transformer is greatly simplified. The design limitation and manufacturing cost can be both lowered.

Abstract: A power supply device includes a power output terminal, a power converter and an electronic circuit breaker. In view of operation of the electronic circuit breaker, when an electric appliance that acts as a load is connected between the power output terminal and a ground terminal, the electronic circuit breaker is activated to output voltage from the power converter to the power output terminal so as to charge the electric appliance. When the electric appliance is done with charging and is removed, the electronic circuit breaker is deactivated to prevent voltage of the power converter from being outputted to the power output terminal. Thus, even if the power output terminal is exposed, the power output terminal won't output power to result in electric shock because of users' inadvertent contact when no electric appliance is being charged, thereby enhancing operational safety.

Abstract: The redundant power supply device includes a power output port, a converter, a comparator unit and an output protection switch. The output protection switch is electrically connected between an output terminal of the converter and the power output port, and the comparator unit compares the voltage across the output protection switch and controls the output protection switch accordingly. The redundant power supply device has a control module that performs a protection control method. When the voltage of the power output port is higher than a preset voltage value and the output current is lower than a preset current value, the control module outputs a short turn-off signal to the enable terminal of the comparator unit, preventing the comparator unit from failing to perform the output protection as designed due to external abnormal slow rising voltage, and ensuring the redundant power supply unit operates normally.