industry news ♦ compound semiconductor ♦ news digest NAMBE conferences.
The award consists of a plaque and a check of $1,000. The deadline for accepting nominations is July 16, 2010.
Other awards include the ‘Outstanding Student Paper Award’. Two will be given based on the quality of the presentations, either oral or poster, made at the Conference. The student awards will be judged by a selection committee consisting of Program Committee members and Advisory Board members at the 2010 NAMBE Conference. The awards consist of a plaque and a check for $500.
A limited number of student travel awards are also available to provide financial assistance for students participating in the conference. The student’s advisor must write a brief letter of support describing how attending NAMBE would benefit the student in his or her professional interests. Priority will be given to students that submit abstracts to the conference. Applicants should email a brief request for a travel award and a letter of support to
aaron.ptak@
nrel.gov.
Fairchild shows its style with 92% efficiency LED drivers 2010-06-24
Fairchild Semiconductor’s LED Drivers Enable Design Flexibility and Extend Battery Life in Mobile Handsets.
Fairchild Semiconductor brings designers of mobile handsets, gaming devices, MP3 players and other small display applications LED drivers that deliver 92% peak efficiency, extending battery life.
The FAN5701 and FAN5702 are 1x to1.5x charge pump-based 180mA, 6-channel LED drivers that backlight TFT LCD displays in mobile electronics. Their low transition voltage from 1x to 1.5x mode allows them to operate
in 1x mode for a longer time period, achieving higher efficiency. Both LED driver products can be configured to support clamshell form factor mobile handsets that have both main and secondary displays.
The FAN5702 is a configurable, 180mA, 6-channel LED driver with I(2)C interface and provides:
-- Design flexibility, enabling it to be used in different lighting applications beyond backlight LCD displays such as Red-Green-Blue (RGB) indicator/fun lights. -- An IC interface, allowing the designer to control the LED outputs individually (2,1,1,1,1 format) and group them together or separately depending upon the design requirements. -- Greater brightness control by having each LED output supporting 64 logarithmic-dimming steps and eliminating distortion especially at lower brightness levels. -- An enable pin, providing the baseband chipset direct control to turn it on or off. -- A PWM signal input to support dynamic backlight control (DBC). DBC is a feature that automatically adjusts the brightness of the LEDs depending upon the image content, which, in turn, helps reduce power consumption. -- A DBC feature with an ambient light sensor providing both dynamic backlight and ambient light control, saving up to 50 % in power consumption.
The FAN5701 LED driver uses two PWM inputs to control the brightness of a grouping of four and two LED outputs. It is ideal for applications where there is a requirement to backlight two LCD displays or to drive a high brightness LED for low power camera flash in mobile handsets.
The FAN5701 and FAN5702 are housed in compact 16-bump WL-CSP and 16-lead UMLP packages to accommodate the slimmer and smaller form factor of today’s portable designs. In WL-CSP form factor the FAN5701 and FAN5702 occupy 2.56 square millimeters, which is claimed to be one of the smallest
July 2010
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