Switching Power Supply Free Patent Search

  • Circuit and method for protecting a switching power supply from a fault condition

    Switching Power Supply Abstract A switching regulator (18) for use in a switching power supply (10) detects a fault condition by looking for asserted feedback signal during a timer period. If feedback is asserted during the timer period, then the swi...

  • Switching power supply

    Switching Power Supply Abstract A switching power supply 10 includes snubber capacitors 8Cb and 8Cc connected in parallel with rectifying devices 4b and 4c, respectively, on the secondary side of a transformer 3. A switching control circuit 7 control...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit includes first and second switching circuits which alternately turn first and second switching elements on and off with an intermediate period in which both are turned off, and energy is s...

  • Switching power supply circuit

    Switching Power Supply Abstract A power supply circuit has a so-called composite resonance type switching converter equipped with a primary resonance circuit for forming a voltage resonance type converter at a primary side, and a secondary resonance...

  • Switching power supply unit, and electronic apparatus incorporating the same

    Switching Power Supply Abstract A switching power supply unit and an electronic apparatus including the same, has a photocoupler that is used for providing feedback from the secondary side to the primary side. The photocoupler is shielded by a heat s...

  • Switching power supply circuit

    Switching Power Supply Abstract The present invention relates to a synchronous rectifying type power supply circuit as a switching power supply having a control circuit including a rectifying FET for synchronous rectifying operation in the secondary...

  • Switching power supply device

    Switching Power Supply Abstract In a switching power supply device, LATCHs (1-5) count a bottom-number, namely, the number of occurrences of a bottom of a ringing generated, FFs(1-4) store the bottom-number, EXNORs (1-4) and AND(1) compare the previo...

  • switching-power-supply-129

    Switching Power Supply Abstract A switching power supply has a bottom detection circuit (55), which judges whether or not a bottom has been reached, based on a voltage of a capacitor (C9) that determines an off time of a switching element (Q1) that g...

  • Switching power supply unit

    Switching Power Supply Abstract An RCC type switching power supply unit with a transformer having a primary winding, a secondary winding, and a feedback winding, a main switching element receiving a feedback signal from the feedback winding and for t...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit comprises: a transformer, a main switching element, a rectifying smoothing circuit, a mode switching circuit and a delay circuit. The transformer has a primary winding, a secondary winding...

  • Switching power supply

    Switching Power Supply Abstract A switching power supply comprises a transformer 3, a switching circuit 1, an output rectifier circuit, an output smoothing circuit, and a snubber circuit. A snubber capacitor 17 has one terminal connected to the one t...

  • Intermittent switching power supply circuit

    Switching Power Supply Abstract An intermittent switching power supply circuit prevents excessive output power on a secondary side of a circuit. An intermittent oscillator is alternately switched on and off to maintain output voltage and/or current r...

  • Switching-power supply unit for reducing power consumption in a stand-by-mode

    Switching Power Supply Abstract In a normal operation mode, a mode changeover controller 8 continuously operates a PWM control circuit 6 so as to operate a switching element 5 at the basic oscillation frequency. In a standby mode, the mode changeover...

  • Switching power supply circuit having constant current circuit

    Switching Power Supply Abstract A switching power supply circuit including a transformer having a primary winding, a secondary winding, and a feedback winding; a direct-current power supply of which one end is connected to one end of said primary win...

  • Self-oscillation type switching power supply unit

    Switching Power Supply Abstract A switching transistor is connected to a primary winding of a transformer, an oscillation frequency control circuit is connected to a feedback winding, the oscillation frequency control circuit controls a first control...

  • Switching power supply device

    Switching Power Supply Abstract A switching power supply device is arranged such that a switching of a main switching element is controlled by a control circuit in accordance with output voltage information fed back from the secondary winding side. O...

  • Switching power supply unit

    Switching Power Supply Abstract A switching power supply unit capable of adjusting the inductance value of a resonance circuit and outputting a rated output voltage regardless of any fluctuation in an input voltage and a load. The switching power sup...