250 Ti/national Semiconductor Lm3509sde/nopb High Efficiency Boosts For Led

US $377.99

Saint Peters, Missouri, United States
Jan 29th

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This is a surplus package of 250 Texas Instruments/National Semiconductor LM3509SDE/NOPB High Efficiency Boosts for White LED's and/or OLED Displays with Dual Current Sinks. Item is sealed in its original static proof packaging and comes as a full reel of 200 units. FEATURES • Integrated OLED Display Power Supply and LED Driver • Drives up to 10 LED’s at 30mA • Drives up to 5 LED’s at 20mA and Delivers up to 21V at 40mA • Over 90% Efficient • 32 Exponential Dimming Steps • 0.15% Accurate Current Matching Between Strings • Internal Soft-Start Limits Inrush Current • True Shutdown Isolation for LED’s • Wide 2.7V to 5.5V Input Voltage Range • 21V Over-Voltage Protection • 1.27MHz Fixed Frequency Operation • Low Profile 10-Pin WSON Package (3mm x 3mm x 0.8mm) • General Purpose I/O • Active Low Hardware Reset APPLICATIONS • Dual Display LCD Backlighting for Portable Applications • Large Format LCD Backlighting • OLED Panel Power Supply DESCRIPTION The LM3509 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels. When configured as a dual output white LED bias supply, the LM3509 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 32 exponential steps. When configured as a white LED + OLED bias supply the LM3509 can independently and simultaneously drive a string of up to 5 white LED’s and deliver a constant output voltage of up to 21V for OLED panels. Output over-voltage protection shuts down the device if V OUT rises above 21V allowing for the use of small sized low voltage output capacitors. The LM3509 is offered in a small 10-pin thermally- enhanced WSON package and operates over the -40°C to +85°C temperature range. We sell high-quality industrial surplus at discounted prices. While we take every effort to inspect and test each item we sell, we do not have the capability to fully evaluate many of the items we sell. All items are sold as is with no warranty (unless otherwise specified) and are non-returnable. If you don’t see the answer you are looking for in our description or photos, PLEASE ask before purchasing.

Condition	New other (see details) : A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections.
Seller Notes	“New surplus item sealed in original static guard package. Full reel of 250.”