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Controladores para LED de retroiluminación

LM3519

NO RECOMENDADO PARA NUEVOS DISEÑOS

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

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LM3519

NO RECOMENDADO PARA NUEVOS DISEÑOS
Hoja de datos Haga su pedido ahora

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 mm × 2.8 mm)
  • 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 principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM3519 High Freq Boost White LED Drvr w/High-Speed PWM Brightness Cntrl datasheet (Rev. B) 3/05/2013

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