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PDF AAT1118A Data sheet ( Hoja de datos )
| Número de pieza | AAT1118A | |
| Descripción | ADJUSTABLE TRIPLE-CHANNEL TFT LCD DC-DC CONVERTER | |
| Fabricantes | Advanced Analog Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AAT1118A (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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AAT1118/A/B
ADJUSTABLE TRIPLE-CHANNEL TFT LCD
DC-DC CONVERTER
Features
Built in 1.6A, 0.2 Switching NMOS
Fault and Thermal Protection
Internal Soft-Start Function
Internal Power Up Sequencing
Dual Adjustable Charge Pump Output
Positive Output to 40V
Negative Output to − 40V
Power Good Output
TSSOP-16 Package
Pin Configuration
(Top View)
PGO
IN1
EO
VDD
GND
VREF
IN3
IN2
1 16
2 15
3 14
AAT1118/A/B
4 13
5 12
6 11
7 10
89
GND1
SW
GND2
VDD2 / VCH3
OUT3
VDD1
OUT2
SHDN
(TSSOP-16 Package)
General Description
The AAT1118/A/B is an adjustable triple-channel
TFT LCD DC-DC converter that provides one
current mode PWM, one positive charge pump and
one negative charge pump. Built-in functions
include soft-start and power up sequencing. When
power is turned on, soft-start avoids inrush current.
Power up sequencing feature provides
compensation for LCD panel to maintain a smooth
voltage during a turn-on cycle.
The DC-DC converter consists of an on-chip
voltage reference, error amplifier, current sense,
pulse width modulation controller, under-voltage
lockout protection, thermal detect, soft-start, and
fault protection circuit.
When the two charge pumps are in operation, the
output voltage would be doubled and the generated
VP3 and VP2 (Note 1) could switch on or off TFT
gate.
With the minimal external components, the
AAT1118/A/B offers a simple and economical
solution for TFT LCD power.
Note 1: Please refer to page 13 and 14 for VP3 and
VP2.
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Page 1 of 18
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V 1.0
1 page  
Electrical Characteristics, VDD= 3.3V, VDDH= 10V
AAT1118/A/B
Oscillator
PARAMETER
Oscillation Frequency
Maximum Duty Cycle
SYMBOL TEST CONDITION
f OSC
D MAX
MIN TYP MAX UNIT
1,100 1,320 1,600 kHz
79 85 92 %
N-Channel Switch
PARAMETER
Current Limit
On-Resistance
Leakage Current
SYMBOL TEST CONDITION
I LIM
R ON
I SWOFF
ISW =1.2A
VSW =12V
MIN
1.1
TYP
1.6
0.28
0.01
MAX
2.1
0.50
20.00
UNIT
A
A
Control Inputs Characteristics
PARAMETER
SYMBOL
Input Low Voltage
VIL
TEST CONDITION
Input High Voltage
VIH
Hysteresis
VHYS
SHDN Pull Up Current
I PH
MIN
0.7
VDD
TYP
0.1
VDD
0.001
MAX
0.3
VDD
UNIT
V
V
1.000
V
A
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5 Page 
Typical Operating Characteristics (Continued)
(VIN = 3.3V, TC = +25°C, unless otherwise noted.)
AAT1118/A/B
18.05
18
17.95
17.9
17.85
17.8
17.75
17.7
0 2 4 6 8 10 12 14 16 18 20
80
75
70
65
60
55
50
45
40
0 2 4 6 8 10 12 14 16 18 20
1.2
1.15
1.1
1.05
1
0.95
0.9
0.85
2.5 3 3.5 4 4.5 5 5.5
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Page 11 of 18
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11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AAT1118A.PDF ] | |
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