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AAT1101 Schematic ( PDF Datasheet ) - Advanced Analogic Technologies

Teilenummer AAT1101
Beschreibung TRIPLE OUTPUT TFT LCD PWM CONTROLLER
Hersteller Advanced Analogic Technologies
Logo Advanced Analogic Technologies Logo 




Gesamt 23 Seiten
AAT1101 Datasheet, Funktion
Advanced Analog Technology, Inc.
AAT1101 Series
Details are subject to change without notice
TRIPLE OUTPUT TFT LCD PWM CONTROLLER
Features
www.DataShzeet4UC.coommplete PWM Power Control Circuitry
z Precision Reference: 1.25V±1% (25 o C )
z Low Operating Voltage: 2.5V to 6.5V
z Under-Voltage Lockout Protection
z 5V or 3.3V Selectable Over Voltage
Lockout Protection (AAT1101/A only)
AAT1101/AAT1101A/AAT1101C: 500kHz Fixed
AAT1101B: 50k~1MHz Programmable
z Internal Power Up Sequence Control
z Totem Pole Output
z Output Short Circuit Protection
z Low Dissipation Current: 2.5mA
(f=500kHz, Duty=50%)
Pin Configuration
TOP VIEW
IE2
PRDB
VDD
1
2
3
OUT2
OUT3
4
5
16 SHDN
15 IE3
14 IE1
13 EO 1
12 PRDS
OUT1 6
GND
SCP
7
8
11 CHC
10 OVS (OSC) (NC)
9 VREF
(TSSOP-16 PACKAGE)
General Description
The AAT1101 series provide an integrated
triple-channel pulse width modulation (PWM) solution
for the power supply of LCD displays. These devices
offer system engineers the flexibility to tailor-make the
power supply circuitry for specific applications. Each
channel contains its own error amplifier, PWM
comparator, dead–time control (DTC) and output driver.
The under-voltage protection, over voltage protection,
power sequence control, shutdown control circuit,
oscillator, short circuit protection, and voltage reference
circuits are the common features of the three channels.
The AAT1101 series contain two exclusive boost
circuits at CH1, CH3 and an exclusive buck_boost
circuit at CH2. AAT1101’s Power Up sequence initiates
at CH1 then CH2 and finally CH3. AAT1101A/C’s
Power Up sequence acts in the order of CH2, CH3, and
then CH1. AAT1101B’s Power Up sequence starts
from CH2, CH1, and then CH3. At the completion of
the Power Up sequencing, the SCP pin stays low and
enters the Wait State of short circuit protection. Power
Up sequencing delay and short circuit protection delay
are set by connecting a capacitor to the SCP pin.
Furthermore, these devices can operate with supply
voltage ranging from 2.5V to 6.5V and function
efficiently in an environment with low power supply.
With a minimum number of external components, the
AAT1101 series offer a simple and cost effective
solution for TFT LCD.
––
Advanced Analog Technology, Inc.
Page 1 of 23
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AAT1101 Datasheet, Funktion
Advanced Analog Technology, Inc.
AAT1101 Series
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (Cont.)
Power Ready Output
Parameter
Test Condition
Min Typ Max Unit
Power Ready Threshold
Voltage
VPRTH TC
1.18 1.28 1.38 V
www.DataSheetP4Uo.wcoemr Ready Source Current IPRTH
5.2 4.0 2.8 µA
Power-Up Sequence Delay
Parameter
Test Condition
Min Typ Max Unit
( )Under Voltage Power Ready t PR t PR = 3.2 ×105 CPRDS
-
t PR - s
Under Voltage CH1 Output t PR
- t PR - s
CH1 Output CH2 Output t CH1 t CH1 = (19531.25) CSCP - t CH1 - s
CH2 Output CH3 Output
t CH2
- 0.8 t CH1 - s
CH3 Output CHC Set High t CH3
- 0.8 t CH1 - s
CH3 Output
SCP Ready to Protect
t CH3
- 0.8 t CH1 - s
SCP Enable Time
t SCP
- 32 t CH1 - s
––
Advanced Analog Technology, Inc.
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AAT1101 pdf, datenblatt
Advanced Analog Technology, Inc.
Block Diagram
AAT1101C Only
AAT1101 Series
EO1
www.DataShIeEe1t4U.com
V ref = 1.2 5V
EA1
V dtc1=0.9V
IE 2
Vr4 = 0 .7V
EA2
IE 3
Vref = 1.2 5V
EA3
EO2
V dtc2= 0.5V
E O 3 V dtc3=0.9V
V REF
V REF
V ref
CHC
PRDB
SDC
UVC
UVPR
PRDS
VDD
4µA
UVC
V P R T H = 1.2 8V
EO1
V r1 = 1.1 5V
EO3
EO2
V r2 = 0 .2 5V
PW M C1
PW M C2
PW M C3
E N 13
L atch
EN2
L atch
EN13
L atch
OUT1
OUT2
OUT3
OSC
UVC
UVLO
SDC
EN1 EN2 EN3
UVCN
L atch
SCP&
Seq C trl
VDD
UVPR
V DD
GND
2µA
V r3 = 1.2 5V
SCP
SDC
UVCN
SHDN
SH D N
––
Advanced Analog Technology, Inc.
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