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PDF AAT1168 Data sheet ( Hoja de datos )
| Número de pieza | AAT1168 | |
| Descripción | TRIPLE-CHANNEL TFT LCD POWER SOLUTION | |
| Fabricantes | Advanced Analog Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AAT1168 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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Advanced Analog Technology, Inc.
May 2008
AAT1168/1168A/1168B
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
GENERAL DESCRIPTION
Built in 3A, 0.2Ω Switching NMOS
www.DPaotasSihtieveet4LUD.cOomDriver Up to 28V/5mA
Negative LDO Driver Down to −14V/5mA
1 VCOM and 4 VGAMMA Operational Amplifiers
28V High Voltage Switch for VGH
Internal Soft-Start Function
1.2MHz Fixed Switching Frequency
3 Channels Fault and Thermal Protection
Low Dissipation Current
QFN-32 Package Available
PIN CONFIGURATION
VOUT3 1
VREF 2
GND 3
GND1 4
VO1 5
VI1- 6
VI1+ 7
VO2 8
AAT1168/
AAT1168A/
AAT1168B
24 EO
23 IN1
22 VDD
21 SW
20 VO5
19 VI5-
18 VI5+
17 VO4
The AAT1168/AAT1168A/AAT1168B is a triple-channel
TFT LCD power solution that provides a step-up PWM
controller, two LDO drivers (one for positive high 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 LDO drivers generate two regulated output voltage
set by external resistor dividers. VGH voltage does not
activate until DLY voltage exceeds 1.25V.
The AAT1168/AAT1168A/AAT1168B 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
AAT1168/A/B offers a simple and economical solution
for TFT LCD power.
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
Version 1.00
Page 1 of 22
1 page  
Advanced Analog Technology, Inc.
May 2008
AAT1168/1168A/1168B
ELECTRICAL CHARACTERISTICS
( VDD = 2.6V to 5.5V, TC = –40 ° C to 85 ° C , unless otherwise specified. Typical values are tested at 25 ° C ambient
temperature, VDD = 5V, VDD1 = 10V.)
Soft Start & Fault Detect
PARAMETER
Channel 1 Soft Start Time
Channel 2 Soft Start Time
www.CDahtaanSnheeel t34US.cooftmStart Time
Channel 1 to Channel 2 Delay
SYMBOL
t SS1
t SS2
t SS3
tD12
TEST CONDITION
AAT1168A Only
MIN TYP MAX UNIT
14 ms
14 ms
14 ms
7 ms
Channel 2 to Channel 3 Delay
tD23
During Fault Protect Trigger Time
tFP
IN1 Fault Protection Voltage
IN2 Fault Protection Voltage
IN3 Fault Protection Voltage
VF1
VF2
VF3
AAT1168A Only
AAT1168/AAT1168B
AAT1168A
AAT1168/AAT1168B
AAT1168A
7 ms
55 ms
165 ms
1.00 1.05 1.10 V
1.13 1.17 1.20 V
0.40 0.45 0.50 V
1.00 1.05 1.10 V
Error Amplifier (Channel 1)
PARAMETER
Feedback Voltage
Input Bias Current
SYMBOL
VIN1
IB1
Feedback-Voltage Line Regulation
VRI1
Transconductance
Voltage Gain
Gm
AV
TEST CONDITION
VIN1= 1V to 1.5V
Level to Produce
VEO = 1.233V
2.6V < VDD < 5.5V
∆I = 5 µ A
MIN
1.221
–40
TYP
1.233
0
MAX
1.245
40
UNIT
V
nA
0.05 0.15 %/V
105
1,500
µS
V/V
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
Version 1.00
Page 5 of 22
5 Page 
Advanced Analog Technology, Inc.
May 2008
TYPICAL APPLICATION CIRCUIT
AAT1168/1168A/1168B
Vin
3.3V To 5V C1
10µF
www.DataSheet4U.com
VADD
R10
R11
R12
R13
R14
R15
ΩR1
10
C2
0.1µF
L
6.8µH
22
VDD
SW 21
7 VI1+
AAT1168/A/B
10 VI2+
12 VI3+
GND1 4
IN1 23
15 VI4+
D
DFLS220L
C3
47µF
ΩR2
97.6k
ΩR3
10k
18 VI5+
VDD1 14
C4
0.1µF
GND2 11
SW
C5
1µF
VOUT1
13.3V/300mA
VGAMMA
C13
1µF
C14
1µF
C15
1µF
C16
1µF
VCOM
ΩR16
10
ΩR17
10
ΩR18
10
ΩR19
10
ΩR20
10
C17
10µF
6 VI1-
5 VO1
9 VI2-
8 VO2
16 VI4-
17 VO4
19 VI5-
20 VO5
13 VO3
CTL
C18
30 CTL
29 DLY
R21
31 ADJ
VGH
C19
1.8nF
ΩR22
57.6k
32 VGH
24 EO
OUT3 26
IN3 25
C6
1µF
ΩR4
6.8k
U1
BAT54S
Q1
MMBT4403
C7
1µF
SW
ΩR5
200k
ΩR6
10k
C8
1µF
U2
BAT54S
VOUT3
25V/30mA
VOUT3 1
SW
C9
0.1µF
U3
BAT54S
C10
0.1µF
GND
3
OUT2 28
IN2 27
ΩR9
10k
VREF 2
ΩR8
62k
C12
0.1µF
ΩR7
6.8k
C11
1µF
Q2
MMBT4401
VOUT2
-6V/30mA
Figure 1. Typical Application Circuit
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
Version 1.00
Page 11 of 22
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AAT1168.PDF ] | |
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