LM2756 Datasheet | Texas Instruments

.ti. SNVS504C - JULY 2007 - REVISED MAY 2013 LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in DSBGA Check for Samples: LM2756 Features - 2 Drives up to 8 LEDs with up to 30m A 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 - 3 Independently Controlled LED Groups Via I2C patible 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, switchedcapacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180m A. 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. Typical Application...