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AAT1164 Schematic ( PDF Datasheet ) - Advanced Analog Technology

Teilenummer AAT1164
Beschreibung TRIPLE-CHANNEL TFT LCD POWER SOLUTION
Hersteller Advanced Analog Technology
Logo Advanced Analog Technology Logo 




Gesamt 24 Seiten
AAT1164 Datasheet, Funktion
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, 0.2Switching NMOS
Positive LDO Driver Up to 28V/5mA
www.DataSheet4U.com
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
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 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 24






AAT1164 Datasheet, Funktion
Advanced Analog Technology, Inc.
April 2007
AAT1164/AAT1164B/AAT1164C
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 = 3.3V, VDD1 = 10V.)
Negative Charge Pump (Channel 2)
PARAMETER
SYMBOL
IN2 Threshold Voltage
VIN2
IN2 Input Bias Current
IB2
OUT2 Leakage Current
wwwO.DUaTta2ShSeoeut4rcUe.coCmurrent
IOFF2
IOUT2
TEST CONDITIONS
IOUT2 = 100 µA
VIN2 = 0.25V to 0.25V
VIN2 = 0V, OUT2 = 12V
VIN2 = 0.35V, OUT2 = 10V
MIN
235
40
1
TYP MAX UNIT
250 265 mV
0 40 nA
20 50 µA
4 mA
Positive Charge Pump (Channel 3)
PARAMETER
SYMBOL
IN3 Threshold Voltage
IN3 Input Bias Current
OUT3 Leakage Current
OUT3 Sink Current
VIN3
IB3
IOFF3
IOUT3
TEST CONDITIONS
IOUT3 = 100 µA
VIN3 = 1V to 1.5V
VIN3 = 1.4V, OUT3 = 28V
VIN3 = 1.1V, OUT3 = 25V
MIN TYP MAX UNIT
1.22 1.25 1.28
V
40 0
40 nA
40 80 µA
14
mA
High Voltage Switch Controller
PARAMETER
SYMBOL
DLY Source Current
IDLY
DLY Threshold Voltage
VDLY
DLY Discharge RON
RDLY
CTL Input Low Voltage
VIL
CTL Input High Voltage
VIH
CTL Input Bias Current
IB4
Propagation Delay CTL to VGH
tPP
VOUT3 to VGH Switch R-on
RONSC
ADJ to VGH Switch R-on
RONDC
VGH to GND1 Switch R-on
RONCG
TEST CONDITIONS
VCTL = 0 to VDD
OUT3 = 25V
VDLY = 1.5V, VCTL = VDD
VDLY = 1.5V, VCTL = GND
VDLY = 1V
MIN TYP MAX UNIT
4 5 6 µA
1.22 1.25 1.28
V
8
0.5 V
2V
40 0
40 nA
100 ns
15 30
30 60
1.5 2.5 3.5 k
台灣類比科技股份有限公司
Advanced Analog Technology, Inc.
Version 1.00
Page 6 of 24

6 Page









AAT1164 pdf, datenblatt
Advanced Analog Technology, Inc.
April 2007
AAT1164/AAT1164B/AAT1164C
FUNCTION BLOCK DIAGRAM
AAT1164/AAT1164B
2
VREF
22
VDD
1.233V
Reference Voltage 1.25V
0.25V
www.DataSheet4U.com23 IN1
Error Amplifier
1. 233V
Fail Fail/ Thermal
Control
Digital Control Block
24 EO
27 IN2
25 IN3
Oscillator
6 VI1-
7 VI1+
9 VI2-
10 VI2+
12 VI3+
16 VI4-
15 VI4+
19 VI5-
18 VI5+
29 DLY
30 CTL
Comparator
0. 25V
1. 25V
Current Sense
and Limit
High Voltage Control
SW 21
GND1
4
GND 3
GND2 11
OUT2 28
OUT3 26
VO1 5
VO2 8
VO3
13
VO4 17
VO5 20
VDD1 14
31 ADJ
VGH
32
VOUT3 1
台灣類比科技股份有限公司
Advanced Analog Technology, Inc.
Version 1.00
Page 12 of 24

12 Page





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