G1572 Global Mixed-mode Technology Programmable 14+1 Channel Voltage Buffers with NVM for TFT LCD Features Supply Operation Range : 6.5V to 18V Applications 14+1 Channels : ---14 Channel Rail-to-Rail Programmable Gamma Buffers 10 bits Resolution for each Channel 25mA Output Current for each Channel 2 Banks Registers Using Bank_Sel to Select which Bank Data Output ---1 Channel Rail-to-Rail Vcom Buffer: 7 Bits Adjustable Output ±100mA Output Current ±260mA Output Short-Circuit Current 20V/μs Slew Rate 2-Wire I2C Slave Mode Interface Using One Control Pin Enable to Store Data into Non-Volatile Memory (NVM) Non-Volatile Memory (NVM) Store Setting (at Least 100 Re-Write Times) QFN5X5-32 Package TFT-LCD Monitors LCD Televisions General Description The G1572 consists of 14+1 channel buffers target toward the needs of thin film transistor liquid crystal display (TFT LCD). This device incorporates one Vcom buffer and 14 gamma buffers, and are programmed through I2C interface. It contains two register banks which can store two different sets of gamma reference values. Each buffer is capable of driving heavy capacitive loads and offering large current loading (Vcom: 100mA, Gammas: 25mA). The G1572 is available in the QFN5X5-32 package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G1572QA1U 1572 -40°C to 85°C QFN5X5-32 Note: QA:QFN5X5-32 1: Bonding Code U: Tape & reel Typical Application Circuit AVDD 10µF 25 SET AGND 200Ω 26 VCOM_ADJ VCOM_FB 28 27 VCOM_OUT AGND 29 30 AVDD 32 31 AVDD Pin Configuration OUT1 1 24 OUT14 OUT2 2 23 OUT13 OUT3 3 22 OUT12 OUT4 4 21 OUT11 OUT5 5 OUT6 Thermal Pad 20 OUT10 6 19 OUT9 OUT7 7 18 OUT8 AVDD 8 17 DVDD AVDD DVDD 10µF DVDD SCL SCL 15 16 3.3V SDA nWR 14 13 SCL DGND AGND 12 11 A0 BANK_SEL 9 10 STATIC_Hi SDA nWR 3.3V 4.7kΩ 10Ω OUT1 0.1µF AVDD 10µF 3.3V to Source Driver 10Ω OUT14 0.1µF BANK_SEL VCOM_FB 4.7kΩ 4.7kΩ 0.1µF 24.9kΩ G1572 QFN5X5-32 A0 STATIC_Hi SDA VCOM_OUT From T-CON * 10Ω AVDD nWR SET 10µF 200kΩ VCOM_ADJ AGND DGND 243kΩ Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. * optional TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Aug 06, 2012 1