Title:
電源装置の過熱保護回路、および直流電源装置
Document Type and Number:
Japanese Patent JP4770446
Kind Code:
B2
Abstract:
In an overheat protection circuit for power supply devices in the present invention, overheat protection is provided by using a Schottky barrier diode (SBD) in place of a dedicated thermosensor. The overheat protection circuit is designed to flow reverse leakage current Ir resulting from temperatures of the SBD thermally coupled with a rectifier diode to a photocoupler inside an output-voltage detecting circuit in a direct-current power supply device. Thereby, where the reverse leakage current of the SBD is increased (where temperatures of the rectifier diode are elevated due to overload), a feedback signal of the output-voltage detecting circuit is increased to decrease the output voltage, thereby the direct-current power supply device is protected from overheat.
Inventors:
Hiroshi Usui
Kyono Yoichi
Kyono Yoichi
Application Number:
JP2005366293A
Publication Date:
September 14, 2011
Filing Date:
December 20, 2005
Export Citation:
Assignee:
Sanken Electric Co., Ltd.
International Classes:
H02M3/28; H02H5/04; H02H7/12
Domestic Patent References:
| JP2004017507A1 | ||||
| JP5300732A | ||||
| JP8084468A |
Attorney, Agent or Firm:
Tadashi Takahashi
Masatake Shiga
Masakazu Aoyama
Masatake Shiga
Masakazu Aoyama