Renesas Electronics ISL76534 Programmable LCD Gamma Buffer

The ISL76534 provides one V_COMm and 14 gamma channels with 10-bit resolution for fine-tuning the gamma curve. LCD panels that are not properly gamma corrected often appear bleached out or too dark. Designers can employ the ISL76534 to calibrate and store the gamma curve, guaranteeing that each LCD powers up and displays eye-pleasing images. The ISL76534's internal EEPROM stores the factory-calibrated gamma and V_COM reference values, and enables significantly higher reliability than competitive devices by offering 10,000 write cycles and 20 years of data retention at 105°C.

The low maximum output current of the ISL76534 Gammer Buffer simplifies power supply and thermal design. The device's low power dissipation also eliminates the need for heatsinks, prevents junction temperature overheating, and allows engineers to use lower cost LDOs instead of switching regulators.

The ISL76534 is available in a 0.4mm thin 28-lead 4.0mm x 5.0mm X2QFN thermally enhanced package. The device is specified for operation across the ambient temperature range of -40°C to +105°C.