An LED related "How To" article has been posted on the site - How to design dimmers for multiple LEDs
Written by Michael Bairanzade, application engineer and Marie-Therese Capron, director, low voltage power management at ON Semiconductor.
They write about how an embedded gradual dimming function provides an easy way to generate the special illumination sequences being requested by portable goods manufacturers. This provides a way, they say, that they could differentiate themselves from their rivals.
Written by Michael Bairanzade, application engineer and Marie-Therese Capron, director, low voltage power management at ON Semiconductor.
They write about how an embedded gradual dimming function provides an easy way to generate the special illumination sequences being requested by portable goods manufacturers. This provides a way, they say, that they could differentiate themselves from their rivals.
It begins:
Not only will the LED peak current I tend to be fully programmable, but it will be expected that each LED can be dimmed to any value between zero and its maximum specified level.Read the full article >>
Generally speaking, LED drivers provide a constant current to bias the LED in appropriate conditions. In a typical portable system, the power source is a battery with an output voltage ranging from 2.8 V to 4.2 V (assuming a standard Li-Ion battery is used).
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