Title:
ＰＷＭ調光制御を具備するＬＥＤシステム又はその他の負荷に対するインダクタ予備充電を具備する駆動システム
Document Type and Number:
Japanese Patent JP5812394
Kind Code:
B2
Abstract:
A method includes receiving a control signal associated with a load, where the control signal is to cause a load change from a perspective of a switching-mode power supply. The method also includes causing the power supply to adjust a current through an inductor of the power supply in response to the control signal. The method further includes delaying delivery of the control signal in order to delay a time of the load change, where the current through the inductor increases during the delay. The control signal could include a request to turn on one or more LEDs. The load could include a current regulator. The method could further include providing the request to the current regulator after the delay, such as after the current through the inductor reaches a specified level. Voltage spikes and audible noise in a capacitor coupled to an output of the power supply can be minimized.
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Inventors:
Riku-Kin Wong
Tse-Cowman
Tse-Cowman
Application Number:
JP2011115369A
Publication Date:
November 11, 2015
Filing Date:
May 24, 2011
Export Citation:
Assignee:
NATIONAL SEMICONDUCTOR CORPORATION
International Classes:
H05B37/02; H01L33/00; H02M3/155
Domestic Patent References:
| JP2008154052A | ||||
| JP2006262654A | ||||
| JP2006074973A | ||||
| JP2006172784A |
Foreign References:
| US20070109825 |
Attorney, Agent or Firm:
Kyozo Katayose
Masaaki Kobashi
Masaaki Kobashi