Datasheet Summary
LM3520 Integrated White LED Driver with Organic LED Display Power Supply
PRELIMINARY
February 2005
LM3520 Integrated White LED Driver with Organic LED Display Power Supply
General Description
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....