at1731a Aimtron Technology, at1731a Datasheet
at1731a
Manufacturer Part Number
at1731a
Description
Dc-dc Power Ic For Tft Panel
Manufacturer
Aimtron Technology
Datasheet
1.AT1731A.pdf
(22 pages)
Feature
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Application
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Aimtron reserves the right without notice to change this circuitry and specifications.
Block Diagram
30 V.
2.6V to 5.5V Supply Voltage Operating Range.
1.2MHz Fixed Switching Frequency.
Current-Mode PWM Step-Up Regulator
Negative Charge-Pump Output Voltage Down
to –30 V.
Positive Charge-Pump Output Voltage Up to
Internal Power-On Sequencing , Soft-Start.
Thermal Protection , Short Circuit Protection.
1uA Shutdown Current.
1.5mA Quiescent Current.
16-pin TSSOP Package.
TFT-LCD Notebook Display
TFT-LCD Desktop Monitor Panels.
Car Navigation Systems.
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
2/8/2006 REV:1.1
Main High-Power Output up to 15V
Typical ± 1% Accuracy
Built-In N-MOS, R
Current-Limit Comparator
V
V
SWN
FBN
SWP
FBP
DDN
DDP
Charge-Pump
Charge-Pump
Negative
Positive
ds(on)
Block
Block
≒0.25Ω(Typ.)
Fax: 886-3-563-0879
Logic Control Block
/SHDN
SS
Reference
Voltage
Description
The AT1731A DC-DC converter supply a compact
and small power supply solution to provide the
regulated voltages required by thin film transistor
(TFT) LCD display. A built-in power sequence
control.
The
high-Frequency
regulator with a built-in 0.25ΩN-MOS that allows the
use of ultra-small inductors and ceramic capacitor to
generate an externally set output voltage up to 15V. It
provides fast transient response to pulsed loads while
operating with efficiencies over 85%.
The two built-in charge-pump regulators are used to
generate the TFT gate-on and gate-off supplies and
can adjust gate-on and gate-off output voltage with
external resistive divider between gate-off/on output
voltage and ground.
AT1731A is available in TSSOP- 16 package.
1
REF
main
DC-DC Power IC for TFT Panel
Preliminary Product Information
Soft-
Short-Circuit
Start
Protection
Converter Block
SCP
Main Step-Up
WWW:
step-up
Email:
1.2
Under-Voltage
http://www.aimtron.com.tw
GND
service@aimtron.com.tw
MHz
Lockout
DC-DC
Protection
Thermal
Vin
current-mode
converter
AT1731A
PGND
FB
COMP
LX
PWM
is
a
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