Datasheet4U Logo Datasheet4U.com

LM3509 - High Efficiency Boost

General 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.

Key Features

  • 1.
  • 2 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.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
LM350 Three-terminal Positive Voltage Regulator Motorola
LM350 3-Amp Adjustable Regulators National Semiconductor
LM350 3 Amp Positive Adjustable Regulator Linear Technology
LM350 3A Positive Voltage Regulator onsemi
LM350 Three-terminal 3A adjustable voltage regulators STMicroelectronics

Other Datasheets by Texas Instruments

Part Number Description
LM350 3-Amp Adjustable Regulator
LM350-N 3-Amp Adjustable Regulator
LM3500 Synchronous Step-up DC/DC Converter
LM3501 Synchronous Step-up DC/DC Converter
LM3502 Step-Up Converter

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 FEATURES 1 •2 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.