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LP5569: LED driver for 3 RGBs in I2C?

Antonio Faggio
Expert 7960 points
Part Number: LP5569
Other Parts Discussed in Thread: LP5018

Hi,

For a new deisgn I am looking for a led drivers to drive at least 3 RGB leds in I2C, but with the possibility of using more addresses (I have two on the same I2C line). Basically I have to illuminate a signal strip of about 5cm in length and I hope that three RGB LEDs are sufficient.

Is LP5569 a good fit here? Or do you have other tips? (it drives up to three RGB LEDs).
Is it a component available in the market? I see that on Mouser and Digikey IS NOT AVAILABLE.

Many Thanks,

Antonio

  • 0
    TI__Genius 9255 points

    Hi Antonio,

    the I2C of LP5569 support up to four different hardware address and it is a Nine-Channel I2C RGB LED Driver With Engine Control and Charge Pump. You can request a sample from 'www.ti.com'.

    Best Regard 

    Monet Xu

     

  • 0 in reply to Monet Xu
    TI__Expert 7960 points

    Hello,

    Ok thanks.

    By reading carefully the ds, I realized that a voltage of 1.8V must be supplied for the logic section.
    This is already a problem, because it means putting an LDO in it, but also my micro is 3V3. Do the logic signals it can receive on the I2C serial and various support a 3V3 input?
    Thanks,

    Antonio

  • 0 in reply to Antonio Faggio
    TI__Genius 9255 points

    Hi Antonio,

    The voltage of V1P8 is range from 1.65V-1.95V and an external DC/DC or LDO is necessary. 3V3 input is too high which will damage the device.

    If the programming function is not necessary, LP5018 is a good choice whose supply voltage is 3V3 and it can drive 6 RGB LEDs on one device.

    Best Regard

    Monet Xu

  • 0 in reply to Monet Xu
    TI__Expert 7960 points

    Hi Monet,

    Yes  understand the voltage of V1P8 cannot exceed two volts.
    What I ask is if I can interface with 3V signals, since you show such an application in the datasheet. But not being convinced, I wanted to be sure (p. 81 of DS for LP5569).

    LP5018 is to be evaluated. In reality the programming function is not needed.
    I take a look at the differences.
    Do you have any comparison table LP5569 vs LP5018? If so please email me> a-faggio

    Many Thanks,

    Antonio

  • 0 in reply to Antonio Faggio
    TI__Genius 9255 points

    Hi Antonio,

    Sorry for my misunderstanding. The voltage of SDL and SCL is range from 0 to Vin so it will be OK to connect with 3V voltage.

    The comparison table will be send later.

    Best Regard 

    Monet Xu