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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

  • 1.
  • 2 Drives 2 to 4 LEDs at 20mA.
  • Up to 30kHz PWM Dimming Control Capability.
  • >80% Peak Efficiency.
  • Up to 8MHz Switching Frequency.
  • Small External Components: 1µH - 3.3µH(typ.2.2μH) Inductor and 1µF Output Capacitor.
  • True Shutdown Isolation.
  • Over-Voltage Protection.
  • Wide Input Voltage Range: 2.7V to 5.5V.
  • Small Footprint SOT-23 Package.

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Datasheet preview – LM3519

Datasheet Details

Part number LM3519
Manufacturer Texas Instruments
File Size 3.76 MB
Description High Frequency Boost White LED Driver
Datasheet download datasheet LM3519 Datasheet
Additional preview pages of the LM3519 datasheet.

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Full PDF Text Transcription

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LM3519 www.ti.com SNVS394B – AUGUST 2005 – REVISED MAY 2013 LM3519 High Frequency Boost White LED Driver with High-Speed PWM Brightness Control Check for Samples: LM3519 FEATURES 1 •2 Drives 2 to 4 LEDs at 20mA • Up to 30kHz PWM Dimming Control Capability • >80% Peak Efficiency • Up to 8MHz Switching Frequency • Small External Components: 1µH - 3.3µH(typ.2.2μH) Inductor and 1µF Output Capacitor • True Shutdown Isolation • Over-Voltage Protection • Wide Input Voltage Range: 2.7V to 5.5V • Small Footprint SOT-23 Package APPLICATIONS • LCD, White LED Backlighting on Mobile Phones • Digital Still Cameras and PDAs • General Purpose LED Lighting in Handheld Devices DESCRIPTION The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices.
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