Integrated circuit device for power supply
AssigneeFuji Electric Co., Ltd.
InventorKenichi NISHIJIMA
Life of this patent
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Abstract
An integrated circuit device, for a power supply that is connected to an AC power source via an input circuit having a capacitor, is able to reliably discharge the capacitor when the AC power source is interrupted. The integrated circuit device includes a first discharge circuit that operates in response to an internal supply voltage and discharges the capacitor via a first switch element that is turned on when the input voltage provided via the input circuit falls below a set voltage, and a second discharge circuit having a second switch element that is turned off when receiving the internal supply voltage but is turned on in response to the input voltage when the supply of internal supply voltage is interrupted.
Claims10
An improved integrated circuit device for supplying control signals to a power supply that is connected to an AC power supply via an input circuit having a capacitor, wherein the improvement comprises:
- a first discharge circuit that operates using an internal supply voltage of the integrated circuit and is turned on to discharge the capacitor when an input voltage supplied to the integrated circuit device via the input circuit falls below a predetermined voltage;
- and
- a second discharge circuit that is turned off when receiving the internal supply voltage but is turned on to discharge the capacitor in response to the input voltage when the supply of the internal supply voltage is interrupted.
Dependencies are inferred from the claim text.