Home >  Applications >  LED TV and Monitors

LED TV and Monitors

 

LED TV and monitor applications use LED drivers for LCD backlighting and RGB LED drivers for indicator lamps.  LED TVs and LCD monitors are AC line powered products.  The AC input power is typically stepped down to a main DC system supply rail at 12V or 24V and auxiliary supplies in the 5V range.  To drive LCD backlighting and indicator lamps, specialized LED drivers must be employed.

 

+ LCD Backlight LED Drivers  

 

LED TVs and LCD monitors use white LED backlights arranged in long series strings or shorter series/parallel LED strings. 

 

  • The number of LEDs in a given string dictates this needed DC voltage level to drive the string. 
  • LED drive voltage is usually a much higher than the 12V or 24V system DC supply
  • LED drivers must provide a voltage boost function along with LED brightness current control. 
  • Kinetic Technologies provides numerous WLED driver solutions with external control.

 

Part NumberDescriptionPackagePackage Alt.Package Alt.1
KTD350 High Efficiency, Wide Voltage Range High Current, LED Controller SOIC-16    
KTD353 High Efficiency, Wide Voltage Range High Current, LED Controller SOIC-16 TQFN3x3-16  

+ RGB LED Drivers  

 

Multicolor RGB LEDs are often used for function indicator lamps in LED TVs and LCD monitors.   The indicator lamps can either be direct RGB LEDs build into the monitor bezel, or to backlight a larger plastic light diffuser.

 

  • RGB LED drivers provide programmable control of LED color and brightness in an ultra small footprint package.
  • 3-channel RGB LED drivers permit custom color and brightness control.
  • 4-channel RGBW devices allow for driving a white LED in addition to the RGB LED.
  • Programming interface options include Express Wire or I2C to ease integration with a wide variety of processors and operating systems.
Part NumberDescriptionPackagePackage Alt.Package Alt.1
KTD2021 3-Channel RGB LED Driver with ExpressWire Control TSOT23-6    
KTD2022 3-Channel RGB LED Driver with ExpressWire Control UTDFN-8 1.5x1.5mm    
KTD2023 4-Channel RGBW LED Driver with ExpressWire Control UTDFN-8 1.5x1.5mm    
KTD2026 3-Channel RGB LED Driver with I2C Control UTDFN-8 1.5x1.5mm    
KTD2027 4-Channel RGBW LED Driver with I2C Control UTDFN-8 1.5x1.5mm    

+ System Power  

 

New generations of LED TV and monitors require increasing levels of features, performance, control and smaller board space. System Power ICs increase the control, performance by integrating multiple functions in a single IC which decreases the overall board area. 

 

  • ICs focused on specfic application areas including mobile phone display power subsystems and multi-channel DC/DC converters optimized for Hi-fi audio. 
  • High efficiency power conversion.
  • Smallest board space with fewest external components for a solution.
  • Programming options cover simple PWM signal control to full-featured I2C interfaces.

 

Part NumberDescriptionPackagePackage Alt.Package Alt.1
KTZ8812 +/- Dual Output DC/DC Converter WLCSP-15 2.2x1.45-15 TDFN 3x2.5-14  

Copyright © 2017 Kinetic Technologies, a Cayman Corporation. Privacy Policy | Terms of Use