General Description

The MX841 is a fixed frequency, constant current source step-up DC/DC converter. The output current is directly regulated making the MX841 ideal for driving series connected white light emitting diodes (LED’s) in backlight applications. The MX841 powers up to 3 series white LED’s at 1.1V, and 20 series/parallel white LED’s at 5.0V.

Features:

• 1.1V to 5.5V Input Range

• 2 Amp Peak Switch Current

• High Efficiency > 80

• 20V Maximum Output with Over-Voltage Protection

• LED Intensity Control

• 1.0 MHz Fixed Frequency Switching

• 8 Lead SOIC Package

Applications:

• White LED Display Backlighting

- Low Voltage: Mobile Phones, PDA’s, MP3 Players, Digital Cameras

- High Drive Current: Vehicle Instrumentation Panels