Integrated White LED Driver With Organic LED Display Power Supply

The LM3520 is a dual Step-up DC/DC converter, designed to drive up to 5 white LEDs with a constant current and to power an organic LED Display with a constant voltage.
A single external resistor is used to set the maximum LED current. The LED current CAN be adjusted by applying a PWM signal to the EN pin. For higher efficiency the LM3520 operates with pulse frequency modulation (PFM) control scheme when the sub-display is enabled. When Main Display is enabled, the device is operating in PWM mode.
Overvoltage protection circuitry and a 1MHz switching frequency allow for the use of small, low cost external components.
Additional features include a low-side NFET Switch that CAN turn off the LED string with no DC current path to ground.
The LM3520 is available in a small 14-pin thermally-enchanced LLP package.
By National Semiconductor Corporation
LM3520 's PackagesLM3520 's pdf datasheet
LM3520SD LLP
LM3520SDX LLP




LM3520 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
LM3520 Application circuits
LM3520 circuits
This is one application circuit of LM3520,If you need more circuits,please download LM3520's pdf datasheet.


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