Switching power supply
AssigneeShingengen Electric Manufacturing Co., Ltd.
InventorsAtsushi Mitamura, Hideyuki Ono
Life of this patent
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Abstract
The present invention provides a switching power supply capable of limiting power supply output power with a method compatible with reduced size regardless of the modulation system. The present invention is able to provide a compact switching power supply that enables the amount of limitation of power supply output power to be regulated as desired with little inrush current and overshoot particularly in the case of adapting to power supply soft starting by providing a reset device between a switching signal generation device and switching element, applying a reset pulse signal to reset device, and changing the duty of the above reset pulse signal between 0% and 100%.
Claims4
A switching power supply comprising:
- a switching element that generates a pulse voltage by switching an input voltage,
- a smoothing device that smoothes said pulse voltage;
- a detection device that detects an output voltage, output current or both;
- a switching signal generation device that receives a signal detected by said detection device and generates a drive signal of said switching element;
- a reset device that switches off said switching element by resetting said drive signal;
- a pulse signal generation device that generates a pulse signal for performing that reset;
- and
- a control signal detection device that detects at least one of input voltage, input current, output voltage or output current to obtain a signal for controlling said pulse signal generation device.
Dependencies are inferred from the claim text.