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TPS92692: High-Power LED Driver Alternatives

Conor
Guru 12185 points
Part Number: TPS92692

Tool/software:

Hi,

We would like to consult with you regarding high-power LED driver solutions using TI products.

Currently, we are using the ADI LT3966 under the following conditions:

  • Input voltage: 24V

  • Output voltage: 48V

  • Output current: 2A × 4 channels

When operating all 4 channels at full load, the IC itself generates significant heat, which presents challenges for our thermal design.

We are therefore looking for a more efficient solution with lower thermal stress, using TI products.
Could you please recommend the optimal solution (device selection and/or suggested architecture) that TI would propose for these requirements?

Thank you very much for your support.

Best regards,

Conor

  • 0
    TI__Expert 5790 points

    Hi Conor, 

    We don't have any 4-channel parts to my knowledge, however, we do have several options with 2-channels and top-exposed pads which will allow for optimal thermal dissipation... What features do you need? Are you attempting to run all four channels continuously or are you able to operate in multi-phase? How do you wish to communicate with the device? What is the end application? What is the maximum ambient temperature this device will have to operate in?

    Best,
    Daniel

  • 0 in reply to Daniel Louis
    Guru 12185 points

    Hi Daniel,

    I plan to use all 4 channels, but the LT3966 generates a lot of heat, so I'm considering alternatives. The final application will be a magnifying glass.
    Could you please tell me what TI solutions are available for 2 channels x 2 chips?

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Expert 5790 points

    Hi Conor, 

    My best recommendation would be the TPS92542 which is a synchronous boost leading  into a two-channel monolithic
    synchronous buck. It has a top-exposed pad which will allow for optimal thermal performance.

    Best,
    Daniel