electronica 2016
Intersil unveils 14-channel programmable gamma buffer for infotainment and ADAS displays
I
ntersil Corporation, a leading provider of innovative power management and precision analog solutions, has announced the industry’s lowest power 14-channel programmable gamma buffer for automotive TFT-LCD displays. The automotive-grade ISL76534 delivers the highest accuracy gamma calibration to ensure consistent brightness and colour matching of every LCD panel inside a vehicle. The ISL76534 is ideal for next generation LCDs designed for infotainment displays, advanced driver assistance system (ADAS) smart mirrors and instrument cluster displays. The robust ISL76534 provides engineers with one Vcom 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. Engineers 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 Vcom 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 ISL76534 circuit architecture makes it easier to use than competitive solutions. No power-supply sequencing is required – either analog or digital power supplies can startup first. At initialisation, all gamma buffer and Vcom output channels monotonically start up together in a controlled fashion preventing any possibility of an LCD panel lock-up. This adds another layer of reliability for ADAS and safety systems, such as backup cameras that rely on LCD panels to startup immediately and work flawlessly. In
addition, the ISL76534’s high 75 dB PSRR prevents power supply noise from reaching the gamma buffer outputs and becoming visible in the LCD panel.
The ISL76534 also provides the
industry’s lowest power consumption at 56.6mW, which is 5x lower than the closest competitor. Its low maximum output current for analog, digital, and Vcom supplies 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. “Carmakers are continuing to leverage a variety of displays to enable new features in next generation vehicles,” said Philip Chesley, senior vice president of Precision Products at Intersil. “Our 14-channel programmable gamma buffer ensures every vehicle’s LCD panels offer consistent rich colour and a uniform, visually appealing appearance drivers have come to expect from their electronics.” Key features and specifications of ISL76534 ● I2
C programmable, 15-channel reference voltage outputs 14-channel gamma references, 10-bit resolution, buffered outputs with 60mA Iout and 5V/µs slew rate
1-channel Vcom calibrator, 10-bit resolution, 100mA (max) Iout and 5V/µs slew rate
● Analog supply operating range from 6.3V to 19V
Non-isolated digital point-of-load standard for 60 A current range published by Architects of Modern Power
T
he Architects of Modern Power (AMP Group) consortium has announced an additional standard aimed at establishing common mechanical and electrical specifications for the development of advanced power conversion technology for distributed power systems. The ‘gigaAMP’ standard, introduced to provide a higher current option in a land-grid array (LGA) footprint, builds on the previously- released ‘picoAMP’ standard, published in September 2015, which defined standards for a lower range of non-isolated platforms ranging from 6 A to 18 A. The 60 A ‘gigaAMP’ standard defines a compact footprint of 25.1 x 14.1 mm in an LGA format.
The new ‘gigaAMP’ standard also adds to the
previously released ‘teraAMP’ standard for non- isolated digital point-of-load (POL) dc-dc converters, released in February 2015, and the
14 CIE electronica 2016
‘microAMP’ and ‘megaAMP’ standards released during electronica in November 2014. The first products to meet with this new ‘gigaAMP’ standard will be announced by AMP Group members later in the year. “The ‘gigaAMP’ standard is a continuation of the AMP Group’s efforts to establish industry standards that cover every aspect of board-level digital power technology,” stated Martin Hägerdal, president of Ericsson Power Modules. “And the addition of this new standard at 60 A helps to further address the growing demands on performance, complexity and flexibility in intelligent power supply infrastructures,” added Steve Pimpis, president and CEO of Murata Power Solutions. The Architects of Modern Power consortium formed in October 2014 is an alliance between CUI, Ericsson Power Modules and Murata with
the objective of providing the most technically advanced, end-to-end solutions with a complete ecosystem of hardware, software and support. Whereas other power supply standards groups are only focused on the mechanical specifications of board mount power supplies, the AMP Group has realised that the standardisation of monitoring, control and communications functions, and the creation of common configuration files for plug-and-play interoperability will define the future of intelligent distributed power systems.
www.cui.com
www.ericsson.com/ourportfolio/ products/power-modules
www.murata.com
● Digital supply operating range from 2.25V to 3.6V
● Ultra-low power consumption of 56.6mW simplifies power supply and thermal design Analog AVDD max current of 2.5mA, amp AVDD max current of 1.2mA, and digital DVDD max current of 0.33mA
● Typical quiescent current power of 12mW at 8V
● High PSRR of 75dB typical at DC ● EEPROM data retention of 20 years at +105°C for extreme robustness and reliability
● EEPROM endurance of 10,000 write cycles ● Over-temperature protection against excessive die temperature
● AEC-Q100 Grade-2 qualified for operation from -40°C to +105°C
Hall A4, Booth 507
www.intersil.com
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