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Controladores LED
Controladores para LED de retroiluminación

LM3530

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Controlador LED blanco de alta eficiencia con capacidad programable de detección de luz ambiental

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LM3530

ACTIVO
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Detalles del producto

Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 500 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -30 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) 40 Type Inductive Switching frequency (max) (kHz) 500 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² (— mm × — mm) DSBGA (YFZ) 12 2.52000000000000018 mm² (— mm × — mm)
  • Drives up to 11 LEDs in series
  • 1000:1 Dimming Ratio
  • 90% Efficient
  • Programmable Dual Ambient Light Sensor Inputs
    with Internal ALS Voltage Setting Resistors
  • I2C Programmable Logarithmic or
    Linear Brightness Control
  • External PWM Input for Simple Brightness
    Adjustment
  • True Shutdown Isolation for LEDs and Ambient
    Light Sensors
  • Internal Soft-Start Limits Inrush Current
  • Wide 2.7-V to 5.5-V Input Voltage Range
  • 40-V and 25-V Overvoltage Protection Options
  • 500-kHz Fixed Frequency Operation
  • 839-mA Peak Current Limit
  • Drives up to 11 LEDs in series
  • 1000:1 Dimming Ratio
  • 90% Efficient
  • Programmable Dual Ambient Light Sensor Inputs
    with Internal ALS Voltage Setting Resistors
  • I2C Programmable Logarithmic or
    Linear Brightness Control
  • External PWM Input for Simple Brightness
    Adjustment
  • True Shutdown Isolation for LEDs and Ambient
    Light Sensors
  • Internal Soft-Start Limits Inrush Current
  • Wide 2.7-V to 5.5-V Input Voltage Range
  • 40-V and 25-V Overvoltage Protection Options
  • 500-kHz Fixed Frequency Operation
  • 839-mA Peak Current Limit

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. L) PDF | HTML 23/12/2014
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Nota sobre la aplicación Analog PWM Dimming in White-LED Drivers 21/12/2016
Nota sobre la aplicación Inductor Selection in Boost Converters for LCD Backlight Applications 24/10/2016
Nota sobre la aplicación Schottky Diode Selection in Asynchronous Boost Converters 6/09/2016
Guía del usuario AN-1991 LM3530 Evaluation Kit (Rev. A) 30/04/2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Controlador o biblioteca

LM3530SW-LINUX — Controlador Linux para LM3530

The Linux driver supports the LM3530 White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lm3530

 

Linux Source Files

The files (...)

Productos y hardware compatibles
GUI para el módulo de evaluación (EVM)

SNVC045 — LM3530 Graphical User Interface

Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YFQ) 12 Ultra Librarian
DSBGA (YFZ) 12 Ultra Librarian
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Soporte y capacitación

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