Current Regulated Switched Capacitor LED Driver With Analog Brightness Control

The LM2791 is a CMOS charge-pump voltage doubler and Regulator that provides two regulated current sources. The LM2791 is designed to drive two white (or blue) LEDs with matched currents (within 0.3%) to produce balanced light sources for Display backlights. They accept an input voltage range from 3V to 5.8V and maintain a constant current determined by an external set resistor.
The LM2791 delivers up to 36mA of load current to accommodate two high forward voltage (typically white) LEDs The switching frequency is 450kHz (min.) to keep the conducted noise spectrum away from sensitive frequencies within portable RF devices.
In the LM2791 brightness is controlled by applying a voltage between GND and 3.0V to the BRGT pin. The LM2791 is available in active high or low shutdown versions. The shutdown pin reduces the operating current to 1?A (max.).
The LM2791 is available in a 10 pin leadless leadframe (LLP) CSP package.
By National Semiconductor Corporation
LM2791 's PackagesLM2791 's pdf datasheet
LM2791LD-H LLP
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LM2791 Pinout, Pinouts
LM2791 pinout,Pin out
This is one package pinout of LM2791,If you need more pinouts please download LM2791's pdf datasheet.

LM2791 Application circuits
LM2791 circuits
This is one application circuit of LM2791,If you need more circuits,please download LM2791's pdf datasheet.


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