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LM3509 датащи(PDF) 1 Page - Texas Instruments |
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LM3509 датащи(HTML) 1 Page - Texas Instruments |
1 / 30 page SW IN OVP MAIN SUB/FB SCL SDA GND VIO SET RSET LM3509 Dual White LED Bias Supply 10 PH 1 PF 1 PF 30 mA per string CIN COUT 8 k: 2.7V to 5.5V 10 k: 10 k: RESET/GPIO LM3509 www.ti.com SNVS495D – FEBRUARY 2007 – REVISED MAY 2013 LM3509 High Efficiency Boost for White LED's and/or OLED Displays with Dual Current Sinks and I2C Compatible Brightness Control Check for Samples: LM3509 1 FEATURES APPLICATIONS 2 • Integrated OLED Display Power Supply and • Dual Display LCD Backlighting for Portable LED Driver Applications • Drives up to 10 LED’s at 30mA • Large Format LCD Backlighting • Drives up to 5 LED’s at 20mA and Delivers up • OLED Panel Power Supply to 21V at 40mA DESCRIPTION • Over 90% Efficient The LM3509 current mode boost converter offers two • 32 Exponential Dimming Steps separate outputs. The first output (MAIN) is a • 0.15% Accurate Current Matching Between constant current sink for driving series white LED’s. Strings The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as • Internal Soft-Start Limits Inrush Current a feedback pin to set a constant output voltage for • True Shutdown Isolation for LED’s powering OLED panels. • 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 Typical Application Circuits 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of 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. |
Аналогичный номер детали - LM3509 |
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Аналогичное описание - LM3509 |
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