Datasheet4U Logo Datasheet4U.com

LM3519 - High Frequency Boost White LED Driver

Datasheet Summary

Description

The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices.

The LED current is internally set to 20mA.

The series connection allows the LED current to be identical for uniform brightness and minimizes the number of traces to the LEDs.

Features

  • a proprietary PFM regulation architecture with switching frequencies between 2MHz to 8MHz, minimizing inductor size. Over-voltage protection circuitry and high frequency operation permit the use of low-cost small output capacitors. During shutdown, the output is disconnected from the input in order to avoid leakage current path through the LEDs to ground. The LM3519 is available in a tiny 6-pin SOT23 package. Features n n n n n n n n n Drives 2 to 4 LEDs at 20mA Up to 30kHz PWM Dimming Control.

📥 Download Datasheet

Datasheet preview – LM3519

Datasheet Details

Part number LM3519
Manufacturer National Semiconductor
File Size 1.35 MB
Description High Frequency Boost White LED Driver
Datasheet download datasheet LM3519 Datasheet
Additional preview pages of the LM3519 datasheet.

📁 Similar Datasheet

  • LM3519 - High Frequency Boost White LED Driver (Texas Instruments)
  • LM351A - 3535 Middle Power LED (Samsung)
  • LM35 - Precision Centigrade Temperature Sensor (Texas Instruments)
  • LM350 - Three-terminal Positive Voltage Regulator (Motorola)
  • LM350 - 3-Amp Adjustable Regulator (Texas Instruments)
  • LM350 - 3 Amp Positive Adjustable Regulator (Linear Technology)
  • LM350 - 3A Positive Voltage Regulator (onsemi)
  • LM350 - Three-terminal 3A adjustable voltage regulators (STMicroelectronics)
  • LM350 - 3-Terminal 3A Positive Adjustable Regulator (Fairchild Semiconductor)
  • LM350-N - 3-Amp Adjustable Regulator (Texas Instruments)
Other Datasheets by National Semiconductor
  • LM351 - Dual Peripheral Drivers
  • LM35 - Precision Centigrade Temperature Sensors
  • LM350 - 3-Amp Adjustable Regulators
  • LM3501 - Synchronous Step-up DC/DC Converter
  • LM3502 - Step-Up Converter
  • LM3503 - Dual-Display Constant Current LED Driver
  • LM350A - 3-Amp Adjustable Regulators
  • LM3520 - Integrated White LED Driver

Full PDF Text Transcription

Click to expand full text
LM3519 High Frequency Boost White LED Driver with High-Speed PWM Brightness Control September 2005 LM3519 High Frequency Boost White LED Driver with High-Speed PWM Brightness Control General Description The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices. The LED current is internally set to 20mA. The series connection allows the LED current to be identical for uniform brightness and minimizes the number of traces to the LEDs. Brightness control is achieved by applying a PWM signal on enable with frequencies up to 30kHz. The LM3519 features a proprietary PFM regulation architecture with switching frequencies between 2MHz to 8MHz, minimizing inductor size.
Published: |