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LM2794

Part Number	LM2794
Manufacturer	National Semiconductor
Description	Current Regulated Switched Capacitor LED Driver
Published	Mar 22, 2005
Detailed Description	LM2794/LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control May 2003 LM2794/L...
Datasheet	LM2794 PDF File

Overview

LM2794/LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control May 2003 LM2794/LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control General Description The LM2794/95 is a fractional CMOS charge-pump that provides four regulated current sources.
It accepts an input voltage range from 2.
7V to 5.
5V and maintains a constant current determined by an external sense resistor.
The LM2794/5 delivers up to 80mA of load current to accommodate four White LEDs.
The switching frequency is 325kHz.
(min.
) to keep the conducted noise spectrum away from sensitive frequencies within portable RF devices.
Brightness can be controlle...

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