Datasheet

ISL45041
TFT-LCD I²C Programmable V_COM Calibrator

Overview
Parametrics
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Typical Diagram

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Key Features

128-Step Adjustable Sink Current Output
2.25V to 3.6V Logic Supply Voltage Operating Range (2.6V Minimum Programming Voltage)
4.5V to 18V Analog Supply Voltage Operating Range (10.8V Minimum Programming Voltage)
I²C Interface With Addresses 100111x and 100110x
On-Chip 7-Bit EEPROM
Output Adjustment SET Pin
Output Guaranteed Monotonic Over-Temperature
Thin 8 Ld 3mm x 3mm DFN (0.8mm max)
Pb-free (RoHS compliant)

Description

The V_COM voltage of an LCD panel needs to be adjusted to remove flicker. This part provides a digital interface to control the sink-current output that attaches to an external voltage divider. The increase in output sink current lowers the voltage on the external divider, which is applied to an external V_COM buffer amplifier. The desired V_COM setting is loaded from an external source via a standard 2-wire I²C serial interface. At power up, the part automatically comes up at the last programmed EEPROM setting.

An external resistor attaches to the SET pin and sets the full-scale sink current that determines the lowest voltage of the external voltage divider.

The ISL45041 is available in an 8 Ld 3mm x 3mm TDFN package with a maximum thickness of 0.8mm for ultra thin LCD panel design.

An evaluation kit complete with software to control the DCP from a computer is available. Reference Application Note AN1275 and "Ordering Information".