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Original question:

Alternative for AL5802-7

Alternative for LT3496

Jan Bock
Expert 3025 points
Other Parts Discussed in Thread: TPS61196, TPS54201, TPS92612

Hello, 

I need a comparable TI LED driver to the LT3496 from analog devises. 

Best regards 

Jan  

  • 0
    TI__Mastermind 22745 points

    Hi Jan,

        The most similar devices from the product line are: TPS54201(Buck), TPS61196(Boost). Maybe you can also check with LPP team, maybe they have a more good choice. 

         BTW, what's the detail application? Since for LT3496, it can be configured with different topology, so what's the detail configuration for your application?

    BR

    Sean

  • 0 in reply to Sean Zhou
    TI__Expert 3025 points

    Hi Sean,

    sorry for the late response. The customer wants to drive a string of RGB Leds with the LT3496. He told me that he needs less than 100mA per string, but a supply voltage of Vout_min= 28V per color string with an input voltage of Vin=24V. The current should be controlled separately for each string. The LED driver should have a small footprint and a small power loss, because the housing is very small and not ventilated.  The application is a controller for a vending machine. I talked with the customer about the opportunity to use 3 TPS92612, because he was also looking for the BCR430U from Infineon. However, I also found the TPS92630 and the TPS92830. Do think that they will be a good choice for the application?

    Best regards,

    Jan 

  • 0 in reply to Jan Bock
    TI__Mastermind 22745 points

    Hi jan

        Yes, TPS92630 is a good solution, tps92830 is for higher output current. So I think TPS92630 is the best choice.

    BR

    Sean

  • 0 in reply to Sean Zhou
    TI__Expert 3025 points

    Hi Sean

    I suggested the TPS92630 to the customer. He ask me if this IC has a high power loss when all three color strings are driven by the same input voltage, because each color needs a different voltage level. Do have information about the power loss in this setup? 

    Best regards

    Jan 

  • 0 in reply to Jan Bock
    TI__Mastermind 22745 points

    Hi Jan,

        Since this is a linear driver, the voltage drop from the supply voltage to Vout will lead to power loss.

    BR

    Sean

  • 0 in reply to Sean Zhou
    TI__Expert 3025 points

    Hi Sean, 

    the customer wants to know how much power loss the chip can handle until it's getting overheated. He ask this because the customer can get an issue with temperature due to the small housing size of the application.

    BR

    Jan 

  • 0 in reply to Jan Bock
    TI__Mastermind 22745 points

    Hi Jan,

        You need to apply an EVM for the customer to evaluate the thermal performance, there is no simple method to estimate.

    BR

    Sean