LM2756

D1A

VIN

VOUT

D2A

D3A D4A

D53

I

2

C Control

Signals

D1B

SDIO

1 µF

1 µF

1 µF

1 µF

GND

D62

C1+

C1-

C2+

C2-

SCL

D1C

HWEN

GROUP A

GROUP B

GROUP C

ISET

Capacitors:

Murata GNM1M2R61C105ME18D 1 µF dual

capacitors, or 1 µF single capacitor equivalent

LM2756

www.ti.com

SNVS504C – JULY 2007 – REVISED MAY 2013

LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in

DSBGA

Check for Samples: LM2756

1

FEATURES

APPLICATIONS

2

•

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

•

Dual Display LCD Backlighting for Portable

Current Each

Applications

•

32 Exponential Dimming Steps with 800:1

•

Large Format LCD Backlighting

Dimming Ratio for Group A (Up to 6 LEDs)

•

Display Backlighting with Indicator Light

•

8 Linear Dimming States for Groups B (Up to 3

LEDs) and D1C (1 LED)

DESCRIPTION

The

LM2756

is

a

highly

integrated,

switched-

•

Programmable Auto-Dimming Function

capacitor, multi-display LED driver that can drive up

•

3 Independently Controlled LED Groups Via

to 8 LEDs in parallel with a total output current of

I2C Compatible Interface

180mA. Regulated internal current sources deliver

•

Up to 90% Efficiency

excellent current and brightness matching in all LEDs.

•

Total Solution Size < 21mm2

The LED driver current sinks are split into three

•

Low Profile 20 Bump DSBGA Package

independently controlled groups. The primary group

(1.615mm × 2.015mm × 0.6mm)

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

LEDs for use in the main phone display, while the

•

0.4% Accurate Current Matching

secondary group (Group B) can be configured to

•

Internal Soft-Start Limits Inrush Current

drive one, two or three LEDs for driving secondary

•

True Shutdown Isolation for LED’s

displays,

keypads

and/or

indicator

LEDs.

An

additional driver, D1C, is provided for additional

•

Wide Input Voltage Range (2.7V to 5.5V)

indicator lighting functions.

•

Active High Hardware Enable

Typical Application Circuit

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.