Many of the commercial “high volume” printers in production today are network linked, either via an ethernet port or wirelessly and feature an LCD control panel. Many are powered by wall adapters or feature an off-line AC-DC converter module proving a single fixed low DC voltage. Kinetic Technologies provide a range of solutions, not only to improve performance, such as EMI/ESD, but also power management solutions to provide protection against overvoltages, on both power and data lines, boost and Buck converters to provide additional internal voltage rails and to optimize the LED backlight of the LCD control panel.
3.0Mhz High Efficiency, Low IQ Synchronous Boost Converter
Kinetic Technologies’ EMI/ESD Suppression solution is the industry’s first of its kind, integrating ESD and Common Mode EMI suppression IC to improve EMC performance in Ethernet applications. It is built around Kinetic Technologies’ patented and proprietary Active EMC suppression technology to enable a “Design for Compliance” approach to system design right from the start. This product helps eliminate EMC compliance challenges by providing consistent EMC performance and improvements utilizing silicon-based technology as opposed to passive technologies. EMI/ESD Suppression enables system designers to comply with:
CISPR22 and FCC Part 15, Class B requirements for Radiated and Conducted Emissions.
IEC 61000-4-3/6 requirements for Radiated and Conducted Immunity, Level 3 or higher.
Quad Channel Active EMI & ESD Suppressor for Ethernet Applications
LCD Backlight LED Drivers
Printer control panels using LCD displays are illuminated by LED backlighting. White LEDs are used for color LCD displays and lower cost IP phones use monochrome displays with either white or other fixed color LEDs. Backlight LED strings are configured in series or series/parallel configurations that often require the supply voltage to be boosted from the PoE source. Multiple current sink drivers connect to long serial strings of WLEDs and therefore require a compliance voltage significantly higher than the battery voltage.
Panel size and resolution determine the number of white LEDs (WLED) required to produce the necessary screen brightness
Dimming techniques to control the brightness can range from simple linear LED brightness control to sophisticated high efficiency PWM control to achieve contrast ratios of typically 20,000:1
High accuracy current sinks to provide uniform backlight across larger panel sizes
High efficiency boost power conversion required to minimize demands on battery power consumption and maximize the battery life between charge cycles
Multiple series/parallel strings of WLED drivers to match the display panel needs
Multiple programming options from simple PWM signal control to full-featured I2C interfaces.
Advanced design, low drop-out current sinks with tight linearity characteristics to maintain constant LED current accuracy over all battery voltage extremes
High efficiency boost converters with integrated protection against LED open and short-circuit conditions
Printers often use multicolor RGB LEDs for indicator lamps. Indicator lamps show power on/off or function status. Implementing indicator lamp LED control circuits to interface LED control switching to microcontroller logic is a tedious design process and requires multiple discrete components.
RGB LED drivers allow simplified programmable control of LED color and brightness
3-channel RGB LED drivers permit custom color control
4-channel RGBW devices allow for driving a white LED in addition to the RGB LED
I2C to ease integration with a wide variety of processors and operating systems
Wide range of ramp up/down timing for slow fade in/out effects and complex repeating patterns