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LM2793

Part Number	LM2793
Manufacturer	National Semiconductor
Description	Low Noise White LED Driver
Published	Mar 22, 2005
Detailed Description	LM2793 Low Noise White LED Constant Current Supply with Dual Function Brightness Control February 2003 LM2793 Low Nois...
Datasheet	LM2793 PDF File

Overview

LM2793 Low Noise White LED Constant Current Supply with Dual Function Brightness Control February 2003 LM2793 Low Noise White LED Constant Current Supply with Dual Function Brightness Control General Description The LM2793 is a highly efficient, semi-regulated 1.
5x CMOS charge pump that provides dual constant current outputs.
The LM2793 has an input voltage range of 2.
7V to 5.
5V.
To control LED brightness, the amount of current driven to the current-mode outputs can be adjusted with an analog voltage and/or a pulse-width-modulated (PWM) square wave.
Pre-regulation of the charge pump minimizes conducted noise on the input.
Combined with a fixed switching frequency of 500kHz, the LM2793 is a...

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