Title:
電源装置の保護装置
Document Type and Number:
Japanese Patent JP6703577
Kind Code:
B2
Abstract:
To prevent an LED power supply unit from being destroyed when an AC power source is erroneously connected to an output side of a protection device.SOLUTION: A protection device 20 is provided between an LED power supply unit 10 and an LED load section 11. When an AC power source is erroneously connected to output ends T7 and T8 of the protection device 20, inflow current from the AC power source is prevented from flowing in the power supply unit 10 by a diode D1 for back flow prevention provided in the one output end T7 in the state that the one output end T7 of the protection device 20 is on a high potential side and the other output end T8 is on a low potential side. A switching element FET1 is made nonconductive by a control signal from a transistor Q2 and the inflow current from the AC power source is prevented from flowing in the power supply unit 10 in the state that the one output end T7 of the protection device 20 is on the low potential side and the other output end T8 is on the high potential side.SELECTED DRAWING: Figure 7
Inventors:
Ryuichi Hayashi
Takafumi Nonaka
Junji Takizawa
Takafumi Nonaka
Junji Takizawa
Application Number:
JP2018174704A
Publication Date:
June 03, 2020
Filing Date:
September 19, 2018
Export Citation:
Assignee:
Wako Institute Inc.
International Classes:
H05B45/54; H05B47/23; H05B47/24; H05B47/25; H05B47/26
Domestic Patent References:
| JP2008220055A |
Foreign References:
| US20130033181 |
Attorney, Agent or Firm:
Atsuo Mori
Masafusa Nakano
Shunichiro Mashiba
Masafusa Nakano
Shunichiro Mashiba