isl24111

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DATASHEET
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9-Channel High Voltage TFT-LCD Logic Level Shifter
with Gate Shaping Function
ISL24111
Features
The ISL24111 is a nine output channel high voltage TFT-LCD
logic level shifter. The ISL24111 converts low power logic-level
input timing signals, generated by the TFT-LCD timing
controller (TCON), to high power level-shifted output signals
used to drive a Gate-In-Panel (GIP) TFT-LCD. The high voltage
level shifters can swing up to +60V, with peak output current of
+460mA (source) and -730mA (sink).
• 9-Channel Logic Level Shifter
The output channels are organized in two separate groups.
Level shifter output channels OUT1 through OUT7 are powered
from VON1 and VOFF (positive and negative supply voltage
rails, respectively), while OUT8 and OUT9 output channels are
powered from VON2 and VOFF. Each output features a low
impedance output stage and achieves fast rise and fall times
with minimal propagation delays. These features make the
device ideal for driving highly capacitive loads in TFT-LCD
applications.
• 50ns Propagation Delay (Typical Low to High)
• 60V Operating Range (VONx - VOFF)
• VON1 [OUT1-OUT7] and VON2 [OUT8, OUT9] Positive Power
Supplies, VOFF Negative Supply
• Gate Shaping Function with FCLK Input for Control
• +460mA and -730mA Peak Output Current for [OUT1-OUT7]
• 300ns Rise, 200ns Fall Time for [OUT1-OUT7]
• 520ns Rise, 350ns Fall Time for [OUT8-OUT9]
• Pb-Free (RoHS Compliant)
• -40°C to +85°C Ambient Operating Range
Applications
• Logic Level Shifter
The device features a gate shaping function that can be
utilized to reduce overall LCD system power and improve
image quality by reducing flicker. Outputs 1 through 6 can
support gate shaping, while outputs 7 through 9 precisely
track their respective input signal.
• TFT-LCD TV, Monitor, Notebook, and Tablet
- Gate-In-Panel (GIP)
- Gate-On-Array (GOA)
- Amorphous Silicon Gate (ASG)
The ISL24111 is available in a thermally enhanced 24 Ld
4x4mm TQFN package. It is specified for operation over the
-40°C to +85°C extended ambient temperature range.
Typical Application
3.3V
TFT-LCD
PANEL
TIMING CONTROL
(TCON)
GND = 0V
INx
5V/DIV
GND = 0V
FCLK
5V/DIV
3.3V
VON1
FCLK IN1~IN7
FCLK, SELx
ISL24111
OUTPUT
CHANNEL
CONTROL
IN8~IN9
OUT1
OUT2
OUT3
OUT2
OUT4
OUT3
OUT5
OUT4
OUT6
OUT5
OUT7
ISL24111
VOFF
VON2
GATE
IN
PANEL
OUT6
OUTx
10V/DIV
VON1 = 30V
VOFF = -7V
RRE to GND = 1kΩ
CL to GND = 150pF
OUT8
OUT7
OUT9
0V
RE
RRE
1µs/DIV
FIGURE 1. TFT-LCD GATE DRIVE LEVEL SHIFTER FOR GIP
July 24, 2012
FN8325.0
1
FIGURE 2. LEVEL SHIFTER WITH GATE SHAPING FUNCTION
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL24111
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accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
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2
FN8325.0
July 24, 2012