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LP8555 - 产品图解：
LP8555-用于平板电脑 PCS 的 LP8555 高效率 LED 背光驱动器
LP8555-背光-LED驱动器-电源管理
LP8555-LP8555 High-Efficiency LED Backlight Driver for Tablet PCs
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TI产品 - LP8555介绍

LP8555 - 用于平板电脑 PCS 的 LP8555 高效率 LED 背光驱动器

LP8555是TI德州仪器公司的一款背光产品，LP8555是用于平板电脑 PCS 的 LP8555 高效率 LED 背光驱动器，本站介绍了LP8555的封装应用图解、特点和优点、功能等，并给出了与LP8555相关的TI元器件型号供参考。

LP8555 - 用于平板电脑 PCS 的 LP8555 高效率 LED 背光驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性
  • 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
产品应用
  • Tablet LCD Display LED Backlight
产品说明

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.

Device Information
ORDER NUMBERPACKAGEBODY SIZE
LP8555YFQRDSBGA (36)2,478mm x 2,478mm
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