Apparatus for controlling LED indicator of charging status at the primary control side of an AC-DC power charger
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United States of America Patent
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Apr 23, 2013
Grant Date -
Dec 23, 2010
app pub date -
Jun 23, 2009
filing date -
Jun 23, 2009
priority date (Note) -
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Abstract
The present invention relates to a charge status indicator and a charger. The charger comprises a charging power supply and a charge status indicator, wherein, the charge status indicator comprises a detecting chip for monitoring charge status connected between the primary winding of transformer and ground, and a display module used for displaying the charge status, wherein, said detecting chip for monitoring charge status comprising: a detecting module for detecting the charging state of the charge power supply; a comparing module for determining the current charge status based on the detected charging state. By employing the charger or the charge status indicator for a charger, a primary-side feedback control Flyback SMPS may be employed, just a simple and reliable circuit is needed, and higher efficient can be achieved.
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