AAT1164C

Advanced Analog Technology, Inc. April 2007 AAT1164/AAT1164B/AAT1164C Product information presented is current as of publication date. Details are subject to change without notice. TRIPLE-CHANNEL TFT LCD POWER SOLUTION WITH OPERATIONAL AMPLIFIERS FEATURES Built in 3A, 0.2Ω Switching NMOS Positive LDO Driver Up to 28V/5mA www.DataSheet4U.com GENERAL DESCRIPTION The AAT1164/AAT1164B/AAT1164C is a triple-channel TFT LCD power solution that provides a step-up PWM controller, two high voltage LDO drivers (one for positive voltage and one for negative voltage), five operational amplifiers, and one high voltage switch up to 28V for TFT LCD display. The PWM controller consists of an on-chip voltage reference, oscillator, error amplifier, current sense circuit, comparator, under-voltage lockout protection and internal soft-start circuit. The thermal and power fault protection prevents internal circuit being damaged by excessive power. The high voltage LDO drivers generate two regulated output voltage (VOUT2 and VOUT3) set by external resistor dividers. VGH voltage does not activate until DLY voltage exceeds 1.25V. The AAT1164/AAT1164B/AAT1164C contains 4+1 operational amplifiers. VO1, VO2, VO4, and VO5 are for gamma corrections and VO3 is for VCOM. In the short circuit condition, operational amplifiers are capable of sourcing ±100mA current for VGAMMA, and ±200mA current for VCOM. With the minimal external components, the AAT1164/AAT1164B/AAT1164C offers a simple and economical s...