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Home › Magazines › 2008 › July/August › Energy-efficient Backlight

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Energy-efficient Backlight

Published in issue 379, July/August 2008

The backlights used in some LCD panels are not exactly economical: typical current draws of 20 mA to 100 mA are common. Normally the current is determined by a series resistor, which leads to additional power losses. It is considerably more efficient, if a little more complex, to use a switching regulator IC.

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