Title:
電源装置および照明器具
Document Type and Number:
Japanese Patent JP7396219
Kind Code:
B2
Abstract:
To provide a power supply device and an illuminating fixture capable of suppressing fluctuation in output voltage of a switching circuit against fluctuation in input voltage to the switching circuit.SOLUTION: A power supply device comprises: a switching circuit that supplies power to a load by turning on and off a switching element; and a control circuit that controls the turning-on and turning-off of the switching element so that an output voltage of the switching circuit agrees with a target value. The control circuit calculates a feedback voltage by adding a voltage corresponding to a difference between the output voltage of the switching circuit and the target value to a bias voltage or by multiplying the voltage by the bias voltage, and controls the turning-on and turning-off of the switching element depending on a result of comparison between the feedback voltage and a voltage corresponding to a current flowing in the switching element. The bias voltage fluctuates depending on a voltage waveform input to the switching circuit in a steady state.SELECTED DRAWING: Figure 2
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Inventors:
Market price Akiho
Yasunori Ano
Yuya Hiramoto
Yasunori Ano
Yuya Hiramoto
Application Number:
JP2020114247A
Publication Date:
December 12, 2023
Filing Date:
July 01, 2020
Export Citation:
Assignee:
Mitsubishi Electric Corporation
Mitsubishi Electric Lighting Co., Ltd.
Mitsubishi Electric Lighting Co., Ltd.
International Classes:
H02M3/28; H05B47/10
Domestic Patent References:
| JP2007228799A | ||||
| JP2014164872A | ||||
| JP2016059169A |
Attorney, Agent or Firm:
Mamoru Takada
Hideki Takahashi
Yoshimi Kuno
Hideki Takahashi
Yoshimi Kuno