tft lcd backlight driver supplier

Edge Electronics provides LCD backlighting solutions for Active (TFT) LCDs. From power products like CCFL inverters, to LED driver boards and LED rails from top manufacturers, to fully custom high bright LED backlighting enhancements, we can help with all of your LCD backlight needs.

To support these applications we have developed our own range of Smart LED Converters to provide the best control over modern LED backlights, and allow the customer to configure the backlight converter to their exact needs.

For more information on our LED Backlight Drivers please contact us today on 01480 411600 to see how we can help you find the perfect display solution.

Now, I do not have experience with backlight, but it seems to me that their choice of a driver is far from optimal. First, MIC2289 is a booster designed to drive up to 34V diodes in series, while the display has five LEDs in parallel. Second, the chip requires external components for soft-start, while many of the alternatives have that built-in.

While looking through LED drivers at digikey I realized that this particular application falls into weird "grey area" because of the way the LEDs are connected. The majority of chips are either step-ups designed to drive series of diodes from single lithium battery in mobile applications, or step-downs designed for higher voltage sources in lighting/automotive applications.

The display datasheet says backlight should be driven by constant current 100mA and "for the reference only" implies that this would require 2.8V to 3.4V. In my case there is 3.3V available from on-board DC-DC, which falls smack-dab in that range. So, any step-up seems to be wrong, for that potential 0.1V difference. Step-downs could be OK, but I don"t know if they really necessary. There are some linear chips like BCR421U that can do the job just fine with only one external resistor, while dissipating 0.05 Watt in the worst case and supporting nice 25kHz PWM dimming.

QUESTION: Which driver topology would you recommend? Do you know of any drivers better suitable for this application and requiring minimum external components?

VDC combines both our internal design capabilities and our strong supplier relationships to offer LED driver solutions for ALL off-the-shelf and custom high brightness LED Back light solutions. VDC utilizes highly efficient LED Driver ICs and PWM dimming to properly drive each LED string. The constant current circuit design also provides the capability to easily customize the maximum or minimum brightness output required for each application.

For NVIS and High bright display designs, VDC designs a dual driver IC with smart communication. The High brightness control communications with the NVIS Mode control allowing for fail-proof operation. Our LED drivers are design and made in the USA. VDC Engineering can recommend or design the proper LCD Driver for any LCD or Custom Back light system. Just let us know what you need and our Engineers or Sales teams will give you the correct LED Driver, with all of the necessary cabling.