DATASHEET
ISL45041 FN6189
Rev 6.00
Apr 22, 2016 TFT-LCD I2C Programmable VCOM Calibrator
The VCOM voltage of an LCD panel needs to be adjusted to
remove flicker. The ISL45041 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
VCOM buffer 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. Features 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. On-chip 7-Bit EEPROM The ISL45041 is available in an 8 Ld 3mmx3mm TDFN
package with a maximum thickness of 0.8mm for ultra thin
LCD panel design. Thin 8 Ld 3mmx3mm DFN (0.8mm max) 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. 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 Output adjustment SET pin Output guaranteed monotonic over-temperature Pb-free (RoHS compliant) Applications LCD panels Related Literature AN1208 “LCD screens don't flicker -or do they?” AN1275, “ISL45041EVAL1Z User’s Manual” AVDD VDD
5 SDA
SCL 6 …
