Advanced Analog Technology, Inc.
April 2007
AAT1164/AAT1164B/AAT1164C
Product information presented is current as of p...
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
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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...