Abstract: A compound control circuit comprises an input end, a light-load signal processing circuit, a slow response circuit and a fast response circuit. The compound control circuit is mainly used as an additional circuit of a work control chip, so that although the work control chip only has a single overcurrent protection level, a compound function control of fast and slow speed, high and low level current protection and light-load signal stabilization can be generated through the compound control circuit, so as to meet the complex application environment and compatible requirements of the current power supply.

Abstract: A control module of a power calibration circuit comprises a control unit, a main voltage feedback unit and an auxiliary voltage feedback unit, the control unit is connected to at least one power switch, the main voltage feedback unit is connected to an output terminal of the power calibration circuit and the control unit, the auxiliary voltage feedback unit is connected to the output terminal and the control unit, the auxiliary voltage feedback unit comprises a voltage dividing circuit connected to the output terminal and having at least one voltage dividing node, and a voltage limiting circuit connected to the voltage dividing node and the control unit, the voltage limiting circuit has a first state when a voltage of the voltage dividing node is not higher than a reference voltage, and a second state when a voltage of the voltage dividing node is higher than the reference voltage.

Abstract: The invention provides an output structure for a power supply, comprising a working circuit board, an output circuit board, a plurality of output connectors, a plurality of heat dissipation plates and a plurality of thermistors. The output circuit board is electrically connected with the working circuit board and is provided with at least one temperature sensing circuit, the plurality of output connectors is arranged on the output circuit board, the plurality of heat dissipation plates is arranged on the output circuit board and close to the output connectors, the plurality of heat dissipation plates senses heat of the output circuit board and at least one of the output connectors at the same time, the plurality of thermistors is arranged corresponding to the plurality of heat dissipation plates one to one and is connected with the at least one temperature sensing circuit.

Abstract: The invention provides a photoelectric energy conversion device applied to a power conversion circuit to replace a magnetic component which is widely used in a power conversion circuit. The photoelectric energy conversion device includes a shell, at least one light generator, and at least one photovoltaic generator, wherein the at least one light generator and the at least one photovoltaic generator are packaged in the shell. The at least one photovoltaic generator receives light generated in the shell by the at least one light generator and generates electric energy based on the light, and the at least one photovoltaic generator serves as a power supply source for a back-end circuit of the photoelectric energy conversion device.

Abstract: A fan driving circuit with temperature compensation comprises a power input end, a power output end connected with a fan motor, a first transistor arranged between the power input end and the power output end, a signal adjuster connected with the first transistor and connected with a signal generating circuit, a second transistor connected with the signal adjuster, and a feedback unit. The feedback unit comprises a first resistor and a second resistor connected in series, and a compensation bypass connected in parallel with the first resistor or the second resistor, wherein the compensation bypass comprises a thermistor, a resistance of the thermistor changes along with the temperature and changes a magnitude of a feedback current which is provided to the second transistor, so as to compensate a change of a common emitter current gain in the second transistor generated by the temperature.

Abstract: A fan control circuit for controlling at least one fan of a power supply device includes a load sensing unit, a temperature sensing unit, a control unit connected to the load sensing unit, the temperature sensing unit and the fan, and a mode switching unit. The load sensing unit generates a load signal according to an output condition of the power supply device. The temperature sensing unit senses the temperature in the power supply device and generates a temperature signal. The control unit comprises a low-speed operating mode for controlling the fan according to the load signal, a mute mode for controlling the fan according to the temperature signal, and a full-speed operating mode for controlling the fan to run in a rated rotational speed. The mode switching unit controls the control unit to adjust the rotational speed of the fan by one of the three modes.

Abstract: A full-bridge resonant conversion circuit comprises a full-bridge rectification unit, a resonant unit, a first transformer, a second transformer and a synchronous rectification unit, wherein the full-bridge rectification unit comprises a first connection end and a second connection end, the resonant unit comprises a first resonant inductor, a resonant capacitor and a second resonant inductor, the resonant capacitor is connected in series with the first resonant inductor or the second resonant inductor. The first transformer comprises a first primary winding connected in series with the first resonant inductor, and a first secondary winding. Also, the second transformer comprises a second primary winding connected in series with the first primary winding and connected with the second resonant inductor, and a second secondary winding connected in parallel with the first secondary winding, and the synchronous rectification unit is connected with the first secondary winding and the second secondary winding.

Abstract: The present invention provides a fan speed control method for avoiding inaccurate control caused by sudden changes in a power supply output state, including the steps of: acquiring an output current value of a power supply device; and then, determining a change of the output current value in a sampling timeframe, if a slope representing the change is positive, controlling the control signal generating unit to gradually replace the fan control signal currently output to the fan with another fan control signal on the basis of a first latency, and if the slope representing the change is negative, controlling the control signal generating unit to gradually replace the fan control signal currently output to the fan with another fan control signal on the basis of a second latency. The first latency and the second latency are determined by the output current value, respectively.

Abstract: The invention provides a power supply structure of a desktop computer, a mainboard to which the desktop computer belongs comprises a mainboard power input port. The power supply structure comprises a cabinet, a power supply device, a power adapting device and a mainboard power supply line. The cabinet comprises a cabinet inner space and a bearing plate. The cabinet inner space is divided into a mainboard mounting side provided for the mainboard to be disposed thereon and a back side. The bearing plate comprises a first through hole. The power adapting device is disposed in the cabinet and located at the back side. The power adapting device comprises a power source input port and a mainboard power supply port penetrating through the first through hole. The mainboard power supply line is connected with the mainboard power supply port and the mainboard power input port.

Abstract: A correction control module for a power factor correction circuit comprises a current sampling unit, an adjustment unit and a control unit. The current sampling unit generates a sampling current based on the operation of a power factor correction circuit. The adjustment unit is connected to the current sampling unit and receives the sampling current. The adjustment unit is composed of a fixed resistance branch and a variable resistance branch connected in parallel with the fixed resistance branch, and the variable resistance and fixed resistance branches receive the sampling current to generate a node voltage. The control unit controls a resistance of the variable resistance branch based on an input voltage and an output voltage of the power factor correction circuit. Thus, an equivalent resistance of the variable resistance branch and the fixed resistance branch is changed according to an operating state of the power factor correction circuit.

Abstract: The present invention provides an ATX specification power supply comprising redundant power supply architecture. A casing where the ATX specification power supply is located includes an ATX specification housing and a frame provided in the ATX specification housing. The frame is defined with a plurality of power module assembly regions and a modulation module assembly region in the ATX specification housing. The power module assembly regions are for a plurality of power modules to be provided therein, and the modulation module assembly region is for a power modulation module to be provided therein. The plurality of power modules and the power modulation module are further connected to a power integration backplate provided in the ATX specification housing, enabling the ATX specification power supply to construct redundant power supply architecture.

Abstract: A transformer structure includes a circuit board, a current bearing plate, a transformer iron core, two wire windings and two plate windings. The circuit board is provided with a rectification filter circuit at least including a filter inductor, a filter capacitor and a rectification switch. The filter inductor is formed by a current guide plate on the circuit board and an inductor iron core sleeved on the current guide plate. The current bearing plate is stacked on the circuit board and electrically connected to the rectification filter circuit. The transformer iron core is on the circuit board. The two plate windings are plate materials, and are wound for at least one turn on the transformer iron core and fixed on the circuit board. The plate windings are electrically connected to the current guide plate and the current bearing plate to jointly withstand a current flowing through the transformer structure.

Abstract: A redundant isolating switch control circuit comprises a working power supply, a power input end, a power output end, at least one field-effect transistor, a first transistor, and a second transistor. The field-effect transistor comprises a gate electrode, a source electrode connected to the power input end and a drain electrode connected to the power output end. The first transistor and the second transistor together with the associated circuits form a current mirror circuit. The redundant isolating switch control circuit further comprises a first electronic unit comprising a first connecting end connected to the first base electrode of the first transistor and a second connecting end connected to the second emitter electrode of the second transistor, and a second electronic unit comprising a third connecting end connected to the first collector of the first transistor and a fourth connecting end connected to the gate electrode.

Abstract: A power supply includes a first and second power conversion modules, changeover switch and control module. The first power conversion module provides at least one working power and generate a power good signal. The power conversion efficiency of the second power conversion module is lower than that of the first power conversion module. The second power conversion module provides a backup power permanently. The control module includes a switch control unit connected to the changeover switch, and a voltage drop adjustment unit connected to the second power conversion module. The control module is provided with a first state, in which the power good signal is not received such that the backup power is outputted continuously, and a second state, in which the changeover switch is turned on while the backup power is dropped to be replaced by the working power from the changeover switch on receiving the power good signal.

Abstract: A buck-boost power conversion circuit comprises a first active switch, a second active switch, an inductor, a center-tapped current transformation element, and a signal rectification unit. The first active switch is cascaded to the second active switch, which is connected in parallel with a power source. The inductor is connected with a capacitor. The center-tapped current transformation element includes a primary winding and a secondary winding. The primary winding are connected with the first and second active switches. The primary winding includes a tapped terminal connected with the inductor. While the first or second active switch is turned on, the primary winding supplies power to the inductor through the tapped terminal, and the secondary winding is induced magnetically to generate a magnetic induction signal. The signal rectification unit is connected with the secondary winding, receiving and rectifying the magnetic induction signal to generate a current sensation signal.

Abstract: A boost converter circuit able to sense current comprises an inductor connected with a power source; an active switch; a passive switch; a capacitor connected with one end of the passive switch, which is not connected with the active switch; a center-tapped current transformation element; and a signal rectification unit. The center-tapped current transformation element includes a primary winding and a secondary winding. Two ends of the primary winding are respectively connected with the active switch and the passive switch. The primary winding is connected with the inductor through a tapped terminal. The secondary winding is magnetically induced by the primary winding to generate a magnetic induction signal while the primary winding receives an inductor current. The signal rectification unit is connected with the secondary winding, receiving the magnetic induction signal and rectifying the magnetic induction signal to generate a sensed current signal corresponding to the inductor current.

Abstract: A totem-pole power factor correction circuit (totem-pole PFC) is connected behind an input inductor receiving electric power from an alternating current (AC) power source. The totem-pole PFC is provided, in a high-frequency working area thereof, with at least two current transformer elements or a center-tapped current transformer element. The waveform of current flowing through the totem-pole PFC during positive and negative half cycles of AC power is sensed via the current transformer elements or the center-tapped current transformer element. Thereby, current waveform for the input inductor during positive and negative half cycles may be realized via the obtained current waveform completely, such that the practical problems originating from the conventional necessity for the establishment of bulky Hall device or another current-sensing unit are solved specifically.