RoHS Compliance Information	Size in Kbytes	Date
LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in micro SMD	511 Kbytes	5-Dec-07	Download

Part Number

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Samples & Electronic Orders

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RoHS Report

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$US each

LM2756TMEV

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

Full production

N/A

1+

$100.00

1

-

6 weeks

N/A

LM2756TM

MICRO SMD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.80

reel of 250

XYTT I DK

6 weeks

N/A

LM2756TMX

MICRO SMD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.80

reel of 3000

XYTT I DK

6 weeks

N/A

General 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.

The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

The LM2756 is available in National’s tiny 20-bump, 0.4mm pitch, thin micro SMD package.

Application Notes

Title	Size in Kbytes	Date
AN-1779: Application Note 1779 LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in µSMD	2288 Kbytes	31-Mar-08	Download
AN-1777: Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions	156 Kbytes	27-Feb-08	Download
AN-1777 (Chinese): Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions	306 Kbytes

More Application Notes

Title	Size in Kbytes	Date
AN-1269: Application Note 1269 LM2750-5.0 Evaluation Board	233 Kbytes	2-Oct-03	Download
AN-1302: Application Note 1302 LM2750-ADJ Evaluation Board	194 Kbytes	26-Mar-04	Download
AN-1998: Application Note 1998 How to Meet the HDMI 5V Source Requirement	117 Kbytes	28-Aug-09	Download
AN-1546: Application Note 1546 LM2754 Evaluation Board	927 Kbytes	3-Nov-06	Download
AN-1546 (Chinese): Application Note 1546 LM2754 Evaluation Board	393 Kbytes
AN-1778: Application Note 1778 LM2755 Charge Pump LED Controller with I2C Compatible Interface in µSMD	4110 Kbytes	30-Apr-08	Download
AN-1695: Application Note 1695 LM2758 Flash LED Driver Evaluation Board	347 Kbytes	9-Apr-08	Download
AN-1731: Application Note 1731 LM2757 Evaluation Board	573 Kbytes	19-Feb-08	Download