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 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.

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.

特性 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