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Patent Searching and Data


Title:
サージ保護装置の使用量をモニタすることが可能なドライバ回路
Document Type and Number:
Japanese Patent JP6530493
Kind Code:
B2
Abstract:
A driver circuit comprises a mains input and a switch mode power converter for delivering an output derived from the mains input by switching using a pulse width modulation signal. The switch mode power converter comprises a pulse width controller for controlling the pulse width of the pulse width modulation signal. A monitor is used for monitoring the pulse width of the pulse width modulation signal and for detecting a surge event from the pulse width, wherein the monitor is for detecting the surge event from changes in the pulse width and/or duty cycle over time, and comprises a monitor circuit for detecting a surge event based on the pulse width and/or duty cycle reducing to correspond to a first pulse from a second pulse, remaining at the first pulse for a time period falling within a first threshold range and then returning to the second pulse, wherein the width of the first pulse is narrower than the second pulse.

Inventors:
Chen Hong
Chen Hong Shin
Application Number:
JP2017536816A
Publication Date:
June 12, 2019
Filing Date:
January 28, 2016
Export Citation:
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Assignee:
SIGNIFY HOLDING B.V.
International Classes:
H02M3/00; H01L33/00; H02H9/04; H05B33/08; H05B37/02
Domestic Patent References:
JP2011019069A
Foreign References:
US20110096445
US20150022103
US20130049589
Attorney, Agent or Firm:
Sakiko Shibata