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LM3519

ACTIVO

Controlador LED blanco elevador de alta frecuencia con control de brillo PWM de alta velocidad

Detalles del producto

Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 20 Type Inductive Switching frequency (max) (kHz) 5400 Duty cycle (max) (%) 95 LED current per channel (mA) 20 Peak efficiency (%) 83 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 20 Type Inductive Switching frequency (max) (kHz) 5400 Duty cycle (max) (%) 95 LED current per channel (mA) 20 Peak efficiency (%) 83 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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 SOT-23 package.

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.

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 SOT-23 package.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM3519 High Freq Boost White LED Drvr w/High-Speed PWM Brightness Cntrl datasheet (Rev. B) 03 may 2013
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020
EVM User's guide AN-1406 LM3519 Evaluation Board (Rev. A) 30 abr 2013

Diseño y desarrollo

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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Paquete Pasadores Descargar
SOT-23-THN (DDC) 6 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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