ADP8140&ADD5211 Design Opportunity

Dear All:

ADD5211&ADP8140 is ADI New Power IC parts for LED backlight App.I want to know the key differences ADP8140 and ADD5211 Where,I know one is Linear type,another is Switch type ,I will design at TV LED backlighting applications and evaluated ADD5211 and ADP8140 are able to meet my specification which one is the best IC? Why is it?

Now I design  In the LCD Panel at the left-side and right-side have LED driver has its own separate control module.This module key specification is Single string output,60V/500mA.

I not find ADP8140 EVB Board information on the ADI website.can you provide ADP8140 EVB Board Schematic/PCB Layout and Gerber File reference to me it?

Thanks

Best Regards,
Jacky



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  • 0
    •  Analog Employees 
    on May 16, 2014 10:55 PM

    Hi Jacky,

    Thanks for your interest in the ADD5211 and ADP8140.  The ADD5211 is a boost LED controller.  It can drive up to 4 strings LEDs and each string can be as high as about 80V and up to 200mA.  It has a dedicated PWM (on/off) LED dimming pin. And analog dimming can be done with the ISET pin.  The ADP8140 is an LED controller.  It offers multiple analog and PWM dimming inputs as well as comprehensive protection of the LEDs and power supply.  It has 4 500mA current sinks.  The main difference between the two solutions is that the ADP8140 can be used with any topology (buck, boost, linear control, AC/DC control, etc.) as it controls a separate power delivery element.  The ADD5211 can only be used in a boost topology, but it includes the power delivery element (the boost converter).

    In conclusion, the choice between the two will depend on your Vin range, Vout (LED Vf) range, desired LED current, and how you would like to dim the LED current.  I can help you choose further if you can you give me some more information on your application.  You can also email me at jon.kraft@analog.com

    Best Regards,

    - Jon

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  • 0
    •  Analog Employees 
    on May 16, 2014 10:55 PM

    Hi Jacky,

    Thanks for your interest in the ADD5211 and ADP8140.  The ADD5211 is a boost LED controller.  It can drive up to 4 strings LEDs and each string can be as high as about 80V and up to 200mA.  It has a dedicated PWM (on/off) LED dimming pin. And analog dimming can be done with the ISET pin.  The ADP8140 is an LED controller.  It offers multiple analog and PWM dimming inputs as well as comprehensive protection of the LEDs and power supply.  It has 4 500mA current sinks.  The main difference between the two solutions is that the ADP8140 can be used with any topology (buck, boost, linear control, AC/DC control, etc.) as it controls a separate power delivery element.  The ADD5211 can only be used in a boost topology, but it includes the power delivery element (the boost converter).

    In conclusion, the choice between the two will depend on your Vin range, Vout (LED Vf) range, desired LED current, and how you would like to dim the LED current.  I can help you choose further if you can you give me some more information on your application.  You can also email me at jon.kraft@analog.com

    Best Regards,

    - Jon

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