ISL24111
9-Channel High Voltage TFT-LCD Logic Level Shifter with Gate Shaping Function
Typical Diagram
Key Features
- 9-Channel Logic Level Shifter
- 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]
- 50ns Propagation Delay (Typical Low to High)
- 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
Description
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).
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.
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.
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.
Applications
- Logic Level Shifter
- TFT-LCD TV, Monitor, Notebook, and Tablet
- Gate-In-Panel (GIP)
- Gate-On-Array (GOA)
- Amorphous Silicon Gate (ASG)
