Switching Power Supply Free Patent Search

  • Method and circuit for detecting light load mode of switching power supply system

    Switching Power Supply Abstract A method and a circuit for detecting a light load mode of a switching power supply system are provided. The switching power supply system has a first winding, a second winding, a third winding having a voltage being in...

  • Switching power supply device for suppressing an increase in ripple output voltage

    Switching Power Supply Abstract An apparatus is provided to suppress an increase in the ripple voltage inevitable in a conventional switching power supply device used at low temperatures. A switching power supply device is provided that has a DC--DC...

  • Low-noise switching power supply

    Switching Power Supply Abstract A low-noise, high-power-factor power supply includes a transformer having a primary winding connected to a pair of a.c. input terminals via a rectifier circuit, and a secondary winding connected to a pair of d.c. outpu...

  • Switching power supply

    Switching Power Supply Abstract A power supply uses a switching element of a desired voltage withstanding property to obtain a desired conversion output. The power supply includes a converter transformer having primary and secondary windings loosely...

  • Switching power supply unit and electronic apparatus using the same

    Switching Power Supply Abstract A switching power supply unit includes a control circuit including a turn-off circuit for turning of a first switch element Q1, which has been in an ON state, and an off-period control circuit for, based on a feedback...

  • Switching power supply

    Switching Power Supply Abstract A switching power supply for preventing the inflow of an electric current from an external when it stops operating. A transistor 32 is connected between a gate of a MOSFET 11 and a first terminal of a secondary winding...

  • Ultra-wide input range switching power supply for circuit protection devices

    Switching Power Supply Abstract A wide input range switching power supply for a circuit protection device includes a rectifier circuit for rectifying an AC line voltage at a supply input, and a switch-mode DC-to-DC converter coupled to the rectifier...

  • Switching power supply circuit

    Switching Power Supply Abstract A switching power supply circuit, which is small, lightweight, and highly efficient in power conversion, includes an insulating converter transformer, which is formed by a core with no gap and a primary and secondary w...

  • Intrinsically safe universal switching power supply

    Switching Power Supply Abstract A universal switching power supply for generating one or more output voltage levels wherein the power supply is operable over a range of AC and DC input supply voltages. The universal switching power supply achieves a...

  • Switching power supply device

    Switching Power Supply Abstract A switching power supply device in which a transformer, a first switch circuit, and an input power source are connected in series. A series circuit formed of a second switch circuit and a capacitor is connected to one...

  • Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying devi

    Switching Power Supply Abstract A magnetic powder core comprises a molded article of a mixture of a glassy alloy powder and an insulating material. The glassy alloy comprises Fe and at least one element selected from Al, P, C, Si, and B, and has a te...

  • Switching power supply capable of ac to dc conversion

    Switching Power Supply Abstract A switching power supply capable of translating a.c. voltage of sinusoidal waveform into d.c. voltage, comprising a rectifier circuit connected to a pair of a.c. input terminals for rectifying the incoming commercial a...

  • Switching power supply unit having a regulator circuit and electronic apparatus using the same

    Switching Power Supply Abstract A switching power supply unit includes a control output circuit, a non-control output circuit, and a regulator circuit. With this switching power supply unit, it is no longer necessary to set the voltage of the non-con...

  • Programmed isolating starting system and method of a switching power supply

    Switching Power Supply Abstract A kind of programmed isolating starting system and method of a switching power supply. A pulse width modulator (PWM) is placed in the secondary circuit of the invention. The programmed isolating starting circuit provid...

  • Switching power supply apparatus having plural outputs and plural output voltage detection

    Switching Power Supply Abstract A switching power supply apparatus comprises a transformer having primary winding and at least two secondary windings, a first switching element connected in series with the primary winding, a control circuit for contr...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit is capable of performing zero-voltage switching in the entire load region to reduce switching loss and noise and improve the voltage transmission efficiency. The switching power supply uni...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit includes first and second switching elements which are alternately turned on/off so as to perform self-excited oscillation. An inductor and a capacitor resonate during an OFF-period of the...