AMS微电子推出为液晶电视设计的高精准度LED驱动芯片

诠鼎集团旗下振远科技代理的AMS奥地利微电子为一全球领先的高效能类比IC设计者及制造商 (SWX股票代码：AMS),其推出两款LED驱动IC，提供最明亮鲜艳的萤幕画面。AS3695A是一款直下式(direct lighting)16通道白光LED驱动器，AS3695C则是采用侧光式(edge lighting)的16通道白光LED控制器。这两款产品扩充了奥地利微电子的新一代液晶电视LED背光模组驱动器及控制器产品线。

这两款IC在电源管理方面都有杰出的表现，并且拥有绝佳的准确度，±0.5%的卓越驱动器准确度维持了精准的亮度和色彩搭配。±0.2%的通道对通道电流匹配可产生高照明对比度，因此能实现最佳的画质和3D效果。除此之外，高度精准的AS3695A和AS3695C采用novel power feedback regulation 控制外部电源，达到最高的系统效率并降低LED背光液晶电视的功耗。

奥地利微电子面板照明部市场经理Markus Luidolt表示:“奥地利微电子一直都以制造最棒的LED背光系统驱动IC而闻名。由于性能杰出，我们生产的驱动器已被许多世界顶级电视品牌采用。长久以来建立的市场地位使我们更清楚的了解直下式和侧光式电视机，有助于我们开发出下一代的LCD驱动器。”

AS3659A和AS3695C这两款元件均可通过一个串流周边接口(SPI)连接埠进行编程，并内建安全功能，包括热断电及LED开路(open)和短路检测 。其他功能还包含通过10-bit DAC来设定线性电流、可编程的输出回转率(slew rate) 、与电视同步的H-Sync 和 V-Sync 输入、直接PWM模式、欠压自动关机、过电压自动关机、温度关机和故障中断输出。

Parts:AS3695A

AS3695A产品规格 :
- 16 channel LED driver for LED BLU
- 120 mA max current
- 30V max voltage
- Absolute current accuracy +/- 0.5%
- Channel to channel accuracy +/-0.2%
- Each channel can be controlled individually
-SPI Interface (no I2C)
- Output slew rate programmable to reduce EMI
- H-Sync, V-Sync inputs - synchronize with TV
- Two Power supply feedback lines
- Safety features:
-Undervoltage detection (Open LED )
-Overtemperature protection
-Auto-shut down
- MLF48 7x7, 0.5mm pitch

AS3695A产品特性：
• Maximum voltage 30V
• Maximum current 120mA
• Improved accuracy between channels
• +/-0.2%
• Improved DAC accuracy
• +/-0.5% at 250mV,
• +/-1% from 200-500mV
• Improved safety features
• automatic channel turn off (open LED)
• Register lock/ unlock function
• Reverse PWM feature
• 8kV ESD protection
• Significant cost down because of reduced maximum voltage & current specification

AS3695A产品应用：
LED backlighting for LCD-TV sets and monitors

 

Parts:AS3695C
AS3695C产品规格 :
- 16 channel LED controller for LED BLU
- Unique base current compensation
- Increase driving capability of BJT – 3mA
- Absolute current accuracy +/- 0.5%
- Channel to channel accuracy +/-0.2%
- Each channel can be controlled individually
-SPI Interface (no I2C)
- Output slew rate programmable to reduce EMI
- H-Sync, V-Sync inputs - synchronize with TV
- Integrated PLL
- Two Power supply feedback lines
- Safety features:
-Undervoltage detection (Open LED )
-30V PIN for LED short detection
-Overtemperature protection
- MLF64 9x9, 0.5mm pitch
- LQFP64 14x14, 0.8mm pitch

 

AS3695C产品特性：
• Unique base current compensation for external bi-polar transistors
• increased accuracy
• possibility to choose cheaper low BETA transistors
• Improved accuracy between channels
• +/-0.2%
• Improved DAC accuracy
• +/-0.5% at 250mV,
• +/-1% from 200-500mV
• Internal PLL for HSync generation
• No need for high speed uP
• Improved safety features
• automatic channel turn off (open LED)
• Short LED detection – additional detection levels
• Register lock/ unlock function

 

AS3695C产品应用：
LED backlighting for LCD-TV sets and monitors