Author - Dario Nurzad

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Dario Nurzad	Write for Electronic Design
Dario Nurzad is product marketing engineer for National Semiconductor Inc., Portable Power Systems, based in Germany. He holds an MSEE from the University of Florence, Italy. Email address: dario.nurzad@nsc.com Web site: http://www.nsc.com
1 results found for Dario Nurzad, displaying items 1 - 1

January 19, 2006 [Ideas For Design]
Adaptive-Gain Charge-Pump Technique Drives White LEDs
For white LEDs to maintain constant luminosity, they're typically driven with a constant dc current source. In portable applications with a single-cell lithium-ion (Li-ion) source, the sum of the voltage drop across the white LED and the current source can be lower or higher than the battery voltage. This means that whereas a single-cell Li-ion battery can directly power a red LED, a white LED sometimes requires a boosted battery voltage. The easiest way to boost the voltage is via a...