Inicio Administración de potencia Controladores LED Controladores para LED de retroiluminación
Inicio
Administración de potencia
Controladores LED
Controladores para LED de retroiluminación

LM27965

ACTIVO

Controlador LED blanco de doble pantalla con control de brillo compatible con I2C

Haga su pedido ahora
Hoja de datos

LM27965

ACTIVO
Hoja de datos Haga su pedido ahora

Detalles del producto

Number of channels 8 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) 1570 Duty cycle (max) (%) 100 LED current per channel (mA) 30 Peak efficiency (%) 91 Topology Buck Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 8 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) 1570 Duty cycle (max) (%) 100 LED current per channel (mA) 30 Peak efficiency (%) 91 Topology Buck Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • 91% Peak LED Drive Efficiency
  • No Inductor Required
  • 0.3% Current Matching
  • Drives LEDs with up to 30mA per LED
  • 180mA of total drive current
  • I2C Compatible Brightness Control Interface
  • Adaptive 1× - 3/2× Charge Pump
  • Resistor-Programmable Current Settings
  • External Chip RESET Pin
  • Extended Li-Ion Input: 2.7V to 5.5V
  • Small low profile industry standard leadless package, WQFN 24 : (4mm x 4mm x 0.8mm)
  • 25mm2 total solution size
  • Two I2C Compatible Chip Address Options: 0x36 for LM27965SQ and 0x38 for
    LM27965SQ-M
  • 91% Peak LED Drive Efficiency
  • No Inductor Required
  • 0.3% Current Matching
  • Drives LEDs with up to 30mA per LED
  • 180mA of total drive current
  • I2C Compatible Brightness Control Interface
  • Adaptive 1× - 3/2× Charge Pump
  • Resistor-Programmable Current Settings
  • External Chip RESET Pin
  • Extended Li-Ion Input: 2.7V to 5.5V
  • Small low profile industry standard leadless package, WQFN 24 : (4mm x 4mm x 0.8mm)
  • 25mm2 total solution size
  • Two I2C Compatible Chip Address Options: 0x36 for LM27965SQ and 0x38 for
    LM27965SQ-M

The LM27965 is a highly integrated charge-pump-based dual-display LED driver. The device can drive up to 9 LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three independently controlled groups. The primary group can beconfigurabled with 4 or 5 LEDs, for backlighting a larger main display and the second group can be configured with 2 or 3 LEDs, for backlighing a smaller secondary display. An additional, independently controlled led driver is provided for driving an indicator or general purpose LED. The LM27965 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

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 LM27965 is available in a small 24-pin WQFN-24 package.

The LM27965 is a highly integrated charge-pump-based dual-display LED driver. The device can drive up to 9 LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three independently controlled groups. The primary group can beconfigurabled with 4 or 5 LEDs, for backlighting a larger main display and the second group can be configured with 2 or 3 LEDs, for backlighing a smaller secondary display. An additional, independently controlled led driver is provided for driving an indicator or general purpose LED. The LM27965 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

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 LM27965 is available in a small 24-pin WQFN-24 package.
filter Buscar otro/a Controladores para LED de retroiluminación
Descargar Ver vídeo con transcripción Video

Documentación técnica

No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 4
Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM27965 Dual Display White LED Driver with I2C Compatible Brightness Control datasheet (Rev. B) 20/02/2013
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Nota sobre la aplicación LM27965 Dual Display White LED Driver w/I2C Compatible Brightness Control (Rev. B) 30/04/2013
Nota sobre la aplicación Optimizing Efficiency in White LED Backlight Applications 21/03/2007

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.

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

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 alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI. ​​​​​​​​​​​​​​

Videos