AAT1168 Datasheet, PDF (10/22 Pages) Advanced Analog Technology, Inc. – TRIPLE-CHANNEL TFT LCD POWER SOLUTION WITH OPERATIONAL AMPLIFIERS

Advanced Analog Technology, Inc.
May 2008
AAT1168/1168A/1168B
PIN NO.
QFN-32
28
29
30
31
32
NAME
OUT2
DLY
CTL
ADJ
VGH
I/O
DESCRIPTION
O Negative Charge Pump Output
I High Voltage Switch Delay Control
I High Voltage Switch Control Pin
O Gate High Voltage Fall Time Setting Pin
O Switching Gate High Voltage for TFT
FUNCTION BLOCK DIAGRAM
AAT1168
2
VREF
22
VDD
1.233V
Reference Voltage _1.25V
0.25V
23 ^IN1
Error Amplifier
1. 233V
Fail
Fail/ Thermal
Control
Digital Control Block
24 ^EO
Comparator
SW ₂₁
GND1
4
27 ^IN2
25 ^IN3
Oscillator
0. 25V
1. 25V
Current Sense
and Limit
GND ₃
GND2 ₁₁
OUT2 ₂₈
OUT3 ₂₆
6 ^VI1-
7 ^VI1+
9 ^VI2-
10 ^VI2+
12 ^VI3+
16 ^VI4-
15 ^VI4+
19 ^VI5-
18 ^VI5+
29 ^DLY
CTL
30
31 ^ADJ
High Voltage Control
2. 5k Ω
VGH
32
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Version 1.00
Page 10 of 22
VO1 ₅
VO2 ₈
VO3
13
VO4 ₁₇
VO5 ₂₀
VDD1 ₁₄
VOUT3 ₁