Inicio Gestión de la energía Controladores LED Controladores para LED de retroiluminación
Inicio
Gestión de la energía
Controladores LED
Controladores para LED de retroiluminación

LM27964

ACTIVO

Sistema de controlador LED blanco con control de brillo compatible con I2C

Haga su pedido ahora
Hoja de datos

LM27964

ACTIVO
Hoja de datos Haga su pedido ahora

Detalles del producto

Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5.5 Type Capacitive Switching frequency (max) (kHz) 900 Duty cycle (max) (%) 100 LED current per channel (mA) 30 Peak efficiency (%) 87 Topology Boost Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 2.7 Vout (max) (V) 5.5 Type Capacitive Switching frequency (max) (kHz) 900 Duty cycle (max) (%) 100 LED current per channel (mA) 30 Peak efficiency (%) 87 Topology Boost Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
WQFN (RTW) 24 16 mm² 4 x 4
  • 87% Peak LED Drive Efficiency
  • 0.2% Current Matching between Current Sinks
  • Drives 6 LEDs with up to 30mA per LED in Two Distinct Groups, for Backlighting Two Displays (main LCD and sub LCD)
  • Dedicated Keypad LED Driver with up to 80mA of Drive Current
  • Independent Resistor-Programmable Current Settings
  • I2C Compatible Brightness Control Interface
  • Adaptive 1×- 3/2× Charge Pump
  • Extended Li-Ion Input: 2.7V to 5.5V
  • Small Low Profile Industry Standard Leadless Package, WQFN-24 : (4mm x 4mm x 0.8mm)
  • LM27964SQ-I LED PWM Frequency = 10kHz, LM27964SQ-C LED PWM frequency = 23kHz

All trademarks are the property of their respective owners.

  • 87% Peak LED Drive Efficiency
  • 0.2% Current Matching between Current Sinks
  • Drives 6 LEDs with up to 30mA per LED in Two Distinct Groups, for Backlighting Two Displays (main LCD and sub LCD)
  • Dedicated Keypad LED Driver with up to 80mA of Drive Current
  • Independent Resistor-Programmable Current Settings
  • I2C Compatible Brightness Control Interface
  • Adaptive 1×- 3/2× Charge Pump
  • Extended Li-Ion Input: 2.7V to 5.5V
  • Small Low Profile Industry Standard Leadless Package, WQFN-24 : (4mm x 4mm x 0.8mm)
  • LM27964SQ-I LED PWM Frequency = 10kHz, LM27964SQ-C LED PWM frequency = 23kHz

All trademarks are the property of their respective owners.

The LM27964 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. The LM27964 can drive up to 6 LEDs in parallel along with multiple keypad LEDs, with a total output current up to 180mA. Regulated internal current sources deliver excellent current matching in all LEDs.

The LED driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display and the second group (2 LEDs) can be used to backlight a secondary display. A single Keypad LED driver can power up to 16 keypad LEDs with a current of 5mA each. The LM27964 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

The LM27964 works off an extended Li-Ion input voltage range (2.7V to 5.5V). The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

The LM27964 is available in TI's small 24-pin WQFN Package (WQFN-24).

The LM27964 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. The LM27964 can drive up to 6 LEDs in parallel along with multiple keypad LEDs, with a total output current up to 180mA. Regulated internal current sources deliver excellent current matching in all LEDs.

The LED driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display and the second group (2 LEDs) can be used to backlight a secondary display. A single Keypad LED driver can power up to 16 keypad LEDs with a current of 5mA each. The LM27964 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

The LM27964 works off an extended Li-Ion input voltage range (2.7V to 5.5V). The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

The LM27964 is available in TI's small 24-pin WQFN Package (WQFN-24).
filter Buscar otro/a Controladores para LED de retroiluminación
Descargar Ver vídeo con transcripción Video

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 2
Tipo Título Fecha
* Data sheet LM27964 White LED Driver System with I2C Compatible Brightness Control datasheet (Rev. D) 02 may 2013
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020

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.

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 (...)
Solicitar
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RTW) 24 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Ver todos los temas del foro en inglés

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

Videos