ISL45041: TFT-LCD I2C Programmable VCOM Calibrator

The VCOM 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 VCOMbuffer amplifier. The desired VCOM 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 3mmx3mm 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” on page 2.

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 3mmx3mm DFN (0.8mm max)
  • Pb-free (RoHS compliant)
Applications
  • LCD panels
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1208: LCD screens don't flicker - or do theyPDF13 Nov 2014162 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL45041 DatasheetPDF22 Apr 2016294 KB
Software
TitleTypeUpdatedSizeOther Languages
ISL4504xEval Kit Software v2.0.2EXE07 Oct 20142.49 MB
User Guides
TitleTypeUpdatedSizeOther Languages
ISL45041EVAL1Z User GuidePDF13 Nov 2014654 KB
ISL45041EVAL1 User GuidePDF13 Nov 2014812 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL45041IRZ8 Ld DFN0.02281260RoHS
ISL45041IRZ-T8 Ld DFN T+R0.02281260RoHS
ISL45041EVAL1N/A
ISL45041EVAL1ZN/ARoHS
ISL45041 Datasheet 22 Apr 2016
8 Ld DFN T+R ISL43L122
AN1208: LCD screens don't flicker - or do they 13 Nov 2014
ISL4504xEval Kit Software v2.0.2 07 Oct 2014
ISL45041EVAL1Z User Guide 13 Nov 2014
ISL45041EVAL1 User Guide 13 Nov 2014