FEATURES

• Drives up to 8 LEDs with up to 30mA of Diode

Current Each

• 32 Exponential Dimming Steps with 800:1

Dimming Ratio for Group A (Up to 6 LEDs)

• 8 Linear Dimming States for Groups B (Up to 3

LEDs) and D1C (1 LED)

• Programmable Auto-Dimming Function switched•

3 Independently Controlled LED Groups Via

I2C Compatible Interface

• Up to 90% Efficiency

• Total Solution Size < 21mm2

• Low Profile 20 Bump DSBGA Package

(1.615mm × 2.015mm × 0.6mm)

• 0.4% Accurate Current Matching

• Internal Soft-Start Limits Inrush Current

• True Shutdown Isolation for LED’s

• Wide Input Voltage Range (2.7V to 5.5V)

• Active High Hardware Enable

APPLICATIONS

• Dual Display LCD Backlighting for Portable

Applications

• Large Format LCD Backlighting

• Display Backlighting with Indicator Light

DESCRIPTION

The LM2756 is a highly integrated, switched•

capacitor, multi-display LED driver that can drive up

to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver

excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three

independently controlled groups. The primary group

(Group A) can be configured to drive four, five or six

LEDs for use in the main phone display, while the

secondary group (Group B) can be configured to

drive one, two or three LEDs for driving secondary

displays, keypads and/or indicator LEDs. An

additional driver, D1C, is provided for additional

indicator lighting functions.