Current Regulated Switched Capacitor LED Supply With Analog And PWM Brightness Control

The LM2794 LM2795 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 LM2795 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 controlled by both linear and PWM techniques. A voltage between 0V and 3.0V may be applied to the BRGT pin to linearly vary the LED current. Alternatively, a PWM signal CAN be applied to the SD pin to vary the perceived brightness of the LED The SD pin reduces the operating current to 2.3?A (typ.) The LM2794 is shut down when the SD pin is low, and the LM2795 is shut down when the SD pin is high.
The LM2794 LM2795 is available in a micro SMD-14 CSP package.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM2794TLX/NOPB Texas Instruments Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control 14-DSBGA -30 to 85
LM2794TL/NOPB Texas Instruments Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control 14-DSBGA -30 to 85
LM2794EVAL Texas Instruments Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control
LM2794 's PackagesLM2794 's pdf datasheet
LM2794BL
LM2794BLX
LM2794TL
LM2794TLX




LM2794 Pinout, Pinouts
LM2794 pinout,Pin out
This is one package pinout of LM2794,If you need more pinouts please download LM2794's pdf datasheet.

LM2794 Application circuits
LM2794 circuits
This is one application circuit of LM2794,If you need more circuits,please download LM2794's pdf datasheet.


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