High Efficiency, Eight-String, White LED Driver for LCD Backlight Applications

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Product Details

The ADD5201 is a white LED driver for backlight applications based on high efficiency, current mode, step-up converter tech-nology. It is designed with a 0.15 Ω, 2.9 A internal switch and a pin adjustable operating frequency between 350 kHz and 1 MHz. The ADD5201 contains eight regulated current sources for uniform brightness intensity. Each current source can be driven up to 30 mA.

The ADD5201 drives up to eight parallel strings of multiple series connected LEDs with a ±1.5% current regulation accuracy. The device provides an adjustable LED driving current up to 30 mA for each channel by an external resistor. The ADD5201 provides various brightness control methods. The LED dimming control can be achieved through SMBus and/or pulse-width modulation (PWM) input. Each dimming mode is selectable with two external dimming mode selection pins. The device pro-vides a pin adjustable output dimming frequency range from 200 Hz to 10 kHz.

The ADD5201 operates over an input voltage range of 6 V to 21 V, but the device can function with a voltage as low as 5.4 V. The ADD5201 has multiple safety protection features to prevent damage during fault conditions. If any LED is open or short, the device automatically disables the faulty current regulator. The internal soft start prevents inrush current during startup. A thermal shutdown protection prevents thermal damage.

The ADD5201 is available in a low profile, thermally enhanced, 4 mm × 4 mm × 0.75 mm, 28-lead, RoHS compliant lead frame chip scale package (LFCSP) and is specified over the industrial temperature range of −25°C to +85°C.


  • Notebook PCs, UMPCs, and monitor displays

Product Lifecycle

checked Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits


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EVAL-ADD5203 Circuit Diagram

Product Details

ADD5203CP-EVALZ is the ADD5201/3 driver board and the 8 channel LED board.

ADD5203EB-EVALZ is just the ADD5201/3 driver board.

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADD5201 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.