Switching Power Supply Free Patent Search

  • Surface-mount type switching power-supply unit and mounting method for the same

    Switching Power Supply Abstract A transformer of a switching power-supply circuit is placed and mounted nearly in the middle area of a circuit board. The transformer is of a low-profile type, and a broad and flat upper surface of the transformer func...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit which contains a secondary battery for backup and a circuit for controlling the charging and discharging of the secondary battery in its enclosure and which properly manages the charging a...

  • Inductor current emulation circuit for switching power supply

    Switching Power Supply Abstract An inductor current emulation circuit for a switched-mode power supply (SMPS) which is arranged such that its inductor current (I.sub.L) goes to zero at least once per switching cycle. The emulation circuit includes an...

  • Switching power supply

    Switching Power Supply Abstract The present invention provides a switching power supply which has an overcurrent protection characteristic with a small number of components. The switching power supply includes a regulator from a drain and an auxiliar...

  • Switching power supply device

    Switching Power Supply Abstract A switching power supply such that the step-up ratio of when the power-factor is improved does not increase, and the conversion efficiency can be improved. In a case where the error voltage Ver outputted from a conduct...

  • Switching power supply circuit using a silicon based LED for feedback

    Switching Power Supply Abstract Flyback power supplies require three chip integrated circuits to control the switching cycles on the primary of a transformer including a chip that detects when a voltage threshold and optionally when a current thresho...

  • Switching power supply for discharge lamp and method for powering a lamp

    Switching Power Supply Abstract The invention concerns a method for powering a discharge lamp with a switching power supply. Said method is characterised in that it consists in: applying a voltage firing the lamp, then after the lamp has been energiz...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit of the present invention a timing generating circuit (121) which receives a first control signal formed by a rectifier-transistor driving circuit (104), forms a second control signal based...

  • 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 unit and electronic apparatus using the same

    Switching Power Supply Abstract A switching power supply unit includes a transformer including a primary winding, a secondary winding, and a feedback winding; an input power supply and a first switching element that are connected in series with the p...

  • Power supply apparatus, switching power supply apparatus, and image forming apparatus

    Switching Power Supply Abstract A power source control chip which is a high voltage controlling portion is added to an ASIC for sequence control constituting a sequence control unit. A PWM signal is sent from the high voltage controlling portion to a...

  • Switching power supply apparatus

    Switching Power Supply Abstract A switching power supply apparatus operates with less power consumption as a whole as a result of reduced power loss suffered while the switching operation of the main switching device is being stopped in burst switchi...

  • Logic controlled high voltage resonant switching power supply

    Switching Power Supply Abstract Methods and apparatuses for a low EMI power supply. The power supply may include a control circuit, a power switch connected to the control circuit, an anti-parallel diode connected to the power switch, an inductor cou...

  • Switching power supply

    Switching Power Supply Abstract In relation to a starting circuit for supplying a DC supply voltage to the gate of a main switching device at a power-on to start a switching operation, a holding circuit for holding a starting voltage obtained in the...

  • Quasi active power factor correction circuit for switching power supply

    Switching Power Supply Abstract A switching power supply AC-DC-DC or AC-DC-AC with power factor corrector function is provided. The switching power supply circuit includes a quasi active shaping function that shapes an input current of a power line....

  • Switching power supply controller

    Switching Power Supply Abstract Controller configured to control the pulse widths with respect to periods of a plurality of pulse-width-modulated switching power supplies to regulate the output from each power supply. Controller utilizes feedback inf...

  • Switching power supply

    Switching Power Supply Abstract Self-oscillating, current controlled switching power supplies, used for example, as energy storage device charging circuits, and related methods are provided herein. In one implementation, a switching power supply comp...