• ADD5211


    Page one of the ADD5211 data sheet states that PWM dimming at 300 Hz, what is the maximum frequency that can be used for PWM dimming?

    Best Regards.

  • ADD5211 power on

    Dear Sir/Madam,

    I`m using the ADD5211 to drive a LCD backlight, but sometimes (very rare) it doesn´t power on.

    After connecting the EN-pin or the UVLO-pin shortly to ground it starts again.

    Unfortunately I didn´t connect the Fault-pin, so I can`t monitor…

  • ADD5211 String fail

    Hey all!

    Some time ago I was looking for a backlight driver solution and successfully use the ADD5211 now.
    We've made over 100 PCBs using the circuit and today one came back which doesn't work anymore.

    The ADD5211 goes into faulty state and stops…

  • ADD5211 Cout,inductor scream issue

    Good day,

             We use ADD5211  for four-string LED driving, input voltage is 12v, output voltage is 20.4v/89mA per string.

    All parameters follow the datasheet and tool guidance, ADD5211 can delight the LEDs but scream issue happen with Cin, Cout and boost…

  • ADD5211 design questions

    Hey all

    I'm not happy with a current backlight solution I use on a custom board, it tends to blow up the driver IC for yet unknown reasons.

    So I looked around for other LED drivers and found the ADD5211.

    I've looked into the datasheet and also…

  • 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 evalua…

  • Consumption current of ADD5211

    Dear Sir/Madam,

    Our customer is still proceeding his design by your ADD5211.

    So I got the following question from custome.

    He will put 200mA LED on each FBs.

    As for your theta-jc 3.8C/W page-6 on your datasheet, we should include each FBs' current…

  • ADD5211 LED Driver SPEC. Issue

    Dear Sir:

    I study ADD5211 LED Driver now. check ADD5211 PrA Datasheet have may question. pls see below. thanks

    Q1:The Figure 2. "dimming control". This function how to control it? not have any description in this document. can you tell me control it…

  • ADD5211 Lighting Board SPEC. Issue

    Dear All:

    Now I testing EVB-ADD5211 evb board. But I want to know If ADD5211 ISET Pin setup to 200mA at this evb board,the LED lighting board result will be how?(LED will be burned?),These LED maximum ratings current is how much ?,Can you provide lighting…

  • ADD5211 FET + Rsense heating


    I've got a small 4-string LED driver board made using AD5211.

    It's schematic is basically the 'application circuit' from current datasheet and from Eval_ADD5211_Calculation.xlsx

    Rfreq = 49.9K (default)

    Rc/Cc = 100R, 2.2uF (default…