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LTM8040

Linear Technology
Part Number LTM8040
Manufacturer Linear Technology
Description 1A Module LED Driver
Published Jun 6, 2009
Detailed Description Electrical Specifications Subject to Change LTM8040 36V, 1A µModule LED Driver www.datasheet4u.com n n n n n n n n FEA...
Datasheet PDF File LTM8040 PDF File

LTM8040
LTM8040

Overview
Electrical Specifications Subject to Change LTM8040 36V, 1A µModule LED Driver www.
datasheet4u.
com n n n n n n n n FEATURES True Color PWM™ Delivers Constant Color with 400:1 Dimming Ratio Wide Input Range: 4V to 36V Up to 1A LED Current Adjustable Control of LED Current High Output Current Accuracy is Maintained Over a Wide Range from 35mA to 1A Open LED and Short-Circuit Protection Grounded Cathode Connection Small Footprint, Low Profile (15mm × 9mm × 2.
82mm) Surface Mount LGA Package DESCRIPTION The LTM®8040 is a fixed frequency 1A step-down DC/DC μModule™ designed to operate as a constant current source.
Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs.
High output current accuracy is maintained over a wide current range, from 35mA to 1A, allowing a wide dimming range over an output voltage range of 2.
4V to 13V.
Unique PWM circuitry allows a dimming range of 400:1, avoiding the color shift normally associated with LED current dimming.
With its wide input range of 4V to 36V, the LTM8040 regulates a broad array of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers, lead acid batteries and distributed power supplies.
The LTM8040 is packaged in a thermally enhanced, compact (15mm × 9mm) and low profile (2.
82mm) molded Land Grid Array (LGA) package suitable for automated assembly by standard surface mount equipment.
The LTM8040 is Pb-free and RoHS compliant.
APPLICATIONS n n n n Automotive and Avionic Lighting Architectural Detail Lighting Display Backlighting Constant Current Sources , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
μModule is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 1A LED Driver μModule 100 VIN* 4V TO 36V 1μF VIN SHDN LEDA LPWR EFFICIENCY (%) TWO WHITE LEDs 6V TO 9V 1A LTM8040 ADJ PWM RT 215k 650kHz GND BIAS...


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