ISL45041

TFT-LCD I2 C Programmable VCOM Calibrator

Product Status: Mass Production

OVERVIEW

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 I2 C 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)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL45041
Basic Information
生产状态
Mass Production
VS (最小值)
4.5 V
VS (最大值)
18 V
分辨率位
7
EEPROM
Yes
总线/输出接口
I2C
资质级别
Standard
CAN 采样
YES
温度范围
-40 to +85

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