GUI para el módulo de evaluación (EVM)
LP8555
Controlador de retroiluminación LED de alta eficiencia para Tablet PC
Hoja de datos
LP8555
- Dual High-Efficiency DC/DC Boost Converters
- 2.7-V to 20-V VDD Range
- 12 50-mA High-Precision LED Current
Sinks With 12-Bit Brightness Control - Adaptive LED Current Sink Headroom
Controls for Maximum System Efficiency - LED String Count Auto-Detection
- Phase-Shifted PWM Mode for Reduced Audible
Noise - PWM Input Duty-Cycle and/or I2C-Register
Brightness Control - Hybrid PWM and Current Dimming for Higher LED
Drive Optical Efficiency - Flexible CABC Support
- EPROM, I2C-Register, or External Resistors
for Configuration - Improved Boost EMI Performance with Slew-Rate Control,
Spread Spectrum, and Phase-Shifted Switching - Extensive Fault Detection Schemes
The LP8555 is a high efficiency LED driver with integrated dual DC-DC boost converters. It has 12 high-precision current sinks that can be controlled by a PWM input signal, an I2C master, or both.
Dual-boost configuration of LP8555 shares the load to two inductors and allows thinner overall solution size and better efficiency compared to single-boost solutions. 12 LED strings allows driving high number of LEDs with optimal efficiency since boost conversion ratio can be kept low.
The boost converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions.
The LED string auto-detect function enables use of the same device in systems with 2 to 12 LED strings for the maximum design flexibility. Proprietary Hybrid PWM and Current dimming mode enables additional system power savings. Phase-shift PWM allows reduced audible noise and smaller boost output capacitors. Flexible CABC support combines brightness level selections based on the PWM input and I2C commands.
Documentación técnica
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 4 | Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | LP8555 High-Efficiency LED Backlight Driver for Tablet PCs datasheet | PDF | HTML | 21 feb 2014 |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 sep 2020 | ||
| Application note | Some Guidelines and Tips for the LED Driver Application | 14 ago 2019 | ||
| User guide | Using the LP8555 Evaluation Module | 21 feb 2014 |
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
LP8555EVM — Módulo de evaluación del controlador de retroiluminación LED de alta eficiencia
The Texas Instruments LP8555EVM evaluation module (EVM) helps designers evaluate the operation and performance of this device. The LP8555EVM uses the LP8555 to drive up to 12 LED strings for LCD backlighting with high efficiency. Information about output voltage and current ratings of LP8555EVM can (...)
Guía del usuario: PDF
Controlador o biblioteca
LP8550SW-LINUX — Controlador Linux para LP8550
The Linux driver supports the LP8550/1/2/3/5/6 and LP8557. The Linux driver supports communication through the I2C bus and interfaces with the backlight and PWM sub-system.
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lp8550
- lp8551
- lp8552
- (...)
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 (...)
| Paquete | Pasadores | Descargar |
|---|---|---|
| DSBGA (YFQ) | 36 | Ver opciones |
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
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.