Intersil公司的ISL76534是集成了EEPROM的超低功耗14路可編伽瑪(Gamma)緩沖器,用于汽車娛樂和ADAS顯示器.器件包括I2C可編程的10位14路Gamma基準電壓發(fā)生器,10位可編程VCOM校準器,高輸出電流VCOM放大器和存儲所有基準電壓數據的EEPROM.模擬工作電壓6.3V-19V,數字工作電壓2.25V-3.6V,主要用在汽車娛樂系統顯示器,汽車中心娛樂系統顯示器(CID),汽車智能鏡,汽車儀表盤顯示器和汽車TFT-LCD顯示器.本文介紹了ISL76534主要特性,框圖和TFT-LCD GAMMA基準電壓發(fā)生器電路圖,以及評估板ISL76534EVAL1Z指標和主要特性,框圖,電路圖,材料清單和PCBV設計圖.

14-Channel Programmable Gamma Buffer for Infotainment and ADAS Displays Ultra-Low Power 14-Channel Programmable Gamma Buffer with Integrated EEPROM The ISL76534 is a programmable gamma buffer for TFT-LCDsfeaturing ultra-low power operaTIon. The ISL76534 contains anI2C programmable,10-bit, 14-channel gamma referencevoltage generator with buffered outputs,a 10-bitprogrammable VCOM calibrator, a high output current VCOMamplifier,and internal EEPROM to store all reference voltagedata.The EEPROM features an endurance of 10,000 writecycles and a data retenTIon of 20 years at 105℃.

Combining gamma and VCOM reference voltage generatorswith low power operaTIon and EEPROM, the ISL76534 providesa complete reference voltage soluTIon ideal for TFT-LCDdisplays.

The ISL76534 is available in a super thin (height = 0.4mmmaximum) 28 Ld 4mmx5mm X2QFN thermally enhancedpackage. The device is specified for operation across theambient temperature -40℃ to +105℃.

ISL76534主要特性:

• 14-channel gamma references, 10-bit resolution withbuffered outputs

• 1-channel VCOM calibrator with 10-bit resolution

• High output current VCOM amplifier

• Ultra-low power operation, ideal for automotive displays:Typical quiescent power, 12mW at 8V AVDD

• EEPROM data retention: 20 years at 105℃

• EEPROM endurance: 10,000 write cycles

- Read/write capable over 2.25V to 3.6V DVDD range

• 6.3V to 19V analog supply operating range

• 2.25V to 3.6V digital supply operating range

• Power Supply Rejection Ratio (PSRR): 75dB typical

• 28 Ld 4mmx5mm super thin X2QFN package

• Pb-free (RoHS compliant)

• AEC-Q100 qualified

ISL76534應用:

• Automotive infotainment display

• Automotive Center Information Display (CID)

• Automotive smart mirrors

• Automotive instrument cluster display

• Automotive TFT-LCD display

圖1.ISL76534框圖

圖2.ISL76534典型應用:TFT-LCD GAMMA基準電壓發(fā)生器

圖3.ISL76534典型應用:TFT-LCD GAMMA和VCOM基準發(fā)生器

　　圖4.ISL76534典型應用：TFT-LCD GAMMA基準發(fā)生器：VCOM放大器不能

　　評估板ISL76534EVAL1Z

　　The ISL76534EVAL1Z is a complete platform for theevaluation on all datasheet specifications and functionalitiesof the programmable gamma buffer. The ISL76534 contains anI2C programmable， 10-bit， 14-channel gamma referencevoltage generator with buffered outputs， a 10-bit programmableVCOM calibrator， a high output current VCOM amplifier and aninternal EEPROM to store all reference voltage data. TheEEPROM features an endurance of 10，000 write cycles and adata retention of 20yrs at 105℃。

　　The ISL76534EVAL1Z board is intended to provide anevaluation platform for the 4mmx5mm X2QFN ISL76534package， programmable gamma buffer.

　　評估板ISL76534EVAL1Z指標：

　　• Ambient temperature range， -40℃ to +105℃

　　• Analog supply voltage， AVDD = 6.3V to 19V

　　• Digital supply voltage， DVDD = 2.25 to 3.6V

　　• Output channels x14， OUTx = 0V to AVDD-Headroom

　　• Output channel x1， VCOM = 0V to AVDD-Headroom

　　評估板ISL76534EVAL1Z主要特性：

　　• 15-Channel reference voltage outputs， I2C programmable：

　　- 14-channel gamma references， 10-bit resolution withbuffered outputs

　　- 1-channel VCOM calibrator with 10-bit resolution

　　• High output current VCOM amplifier

　　• Ultra-low power operation， ideal for tablet and mobileapplications： typical quiescent power， 12mW at 8V AVDD

　　• EEPROM data retention： 20yrs at 105℃

　　• EEPROM endurance： 10，000 write cycles

　　- Read/write capable over 2.25V to 3.6V DVDD range

　　• 6.3V to 19V analog supply operating range

　　• 2.25V to 3.6V digital supply operating range

　　• 28 Ld 4x5mm super thin X2QFN package

　　• Pb-free （RoHS compliant）

　　• AEC-Q100 qualified

圖5.評估板ISL76534EVAL1Z外形圖

圖6.評估板ISL76534EVAL1Z框圖

圖7.評估板ISL76534EVAL1Z電路圖(1)

圖8.評估板ISL76534EVAL1Z電路圖(2)

評估板ISL76534EVAL1Z材料清單:

圖9.評估板ISL76534EVAL1Z PCB設計圖(1):頂層絲印

圖10.評估板ISL76534EVAL1Z PCB設計圖(2):頂層元件

圖11.評估板ISL76534EVAL1Z PCB設計圖(3):內層2

圖12.評估板ISL76534EVAL1Z PCB設計圖(4):內層3

圖13.評估板ISL76534EVAL1Z PCB設計圖(5):底層焊接

圖14.評估板ISL76534EVAL1Z PCB設計圖(6):底層絲印