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LM36923

ACTIVO

Controlador LED blanco síncrono de 30 V, de cadena triple y alta eficiencia

Detalles del producto

Number of channels 3 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 29.5 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 92 Topology Boost Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, PWM control, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 3 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 29.5 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 92 Topology Boost Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, PWM control, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFF) 12 2.52000000000000018 mm² 1.4000000000000001 x 1.8
  • 1% Matched Current Sinks Across (Process, Voltage, Temp)
  • 3% Current Sink Accuracy Across (Process, Voltage, Temp)
  • 11-Bit Dimming Resolution
  • Up to 91.6% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 28 V
  • PWM Dimming Input
  • I2C Programmable
  • Selectable 500-kHz and 1-MHz Switching Frequency with Optional –12% shift
  • Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
  • Four Configurable Overvoltage Protection Thresholds (17 V, 21 V, 25 V, 29 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA, 1500 mA)
  • Thermal Shutdown Protection
  • 1% Matched Current Sinks Across (Process, Voltage, Temp)
  • 3% Current Sink Accuracy Across (Process, Voltage, Temp)
  • 11-Bit Dimming Resolution
  • Up to 91.6% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 28 V
  • PWM Dimming Input
  • I2C Programmable
  • Selectable 500-kHz and 1-MHz Switching Frequency with Optional –12% shift
  • Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
  • Four Configurable Overvoltage Protection Thresholds (17 V, 21 V, 25 V, 29 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA, 1500 mA)
  • Thermal Shutdown Protection

The LM36923 is an ultra-compact, highly efficient, threestring white-LED driver designed for LCD display backlighting. The device can power up to 8 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.

The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies and noise-free operation.

The device operates over the 2.5-V to 5.5-V input voltage range and -40°C to 85°C temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM36923 is an ultra-compact, highly efficient, threestring white-LED driver designed for LCD display backlighting. The device can power up to 8 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.

The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies and noise-free operation.

The device operates over the 2.5-V to 5.5-V input voltage range and -40°C to 85°C temperature range.

For all available packages, see the orderable addendum at the end of the data sheet.

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LM36922 ACTIVO Controlador LED blanco síncrono de 30 V, de cadena doble y alta eficiencia This product is a 3 string backlight driver with 11-bits of exponential dimming.

Documentación técnica

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Tipo Título Fecha
* Data sheet LM36923 Highly Efficient Triple-String White LED Driver datasheet (Rev. A) PDF | HTML 07 oct 2016
Application note How to use the LM3697 Device to Design a Backlight Unit in a Smartphone PDF | HTML 15 abr 2021
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020
Application note Analog PWM Dimming in White-LED Drivers 21 dic 2016
Application note Inductor Selection in Boost Converters for LCD Backlight Applications 24 oct 2016
Application note Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight 14 oct 2016
Application note Schottky Diode Selection in Asynchronous Boost Converters 06 sep 2016
EVM User's guide Using the LM36923EVM Evaluation Module 05 mar 2015

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.

Placa de evaluación

LM36923EVM — EVM de controlador LED blanco de tres cadenas de alta eficiencia LM36923EVM

The LM36923 Evaluation Module (LM36923EVM) is designed to fully evaluate the LM36923 Highly Efficient Triple-String White LED backlight driver.  The LM36923EVM consists of the LM36923 with 3p8s white LED strings with jumpers to enable 1p2s thru 3p8s led string configurations.  LED string (...)

Guía del usuario: PDF
GUI para el módulo de evaluación (EVM)

SNVC167 LM36923EVM/LM36922EVM GUI Software

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores para LED de retroiluminación
LM36922 Controlador LED blanco síncrono de 30 V, de cadena doble y alta eficiencia LM36923 Controlador LED blanco síncrono de 30 V, de cadena triple y alta eficiencia
Desarrollo de hardware
Placa de evaluación
LM36922EVM Módulo de evaluación de controlador LED blanco de dos cadenas de alta eficiencia LM36922 LM36923EVM EVM de controlador LED blanco de tres cadenas de alta eficiencia LM36923EVM
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 (...)
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YFF) 12 Ultra Librarian

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

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

Soporte y capacitación

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