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TPS61185 Thermal data

tateo yamashiro
Guru 10890 points
Other Parts Discussed in Thread: TPS61185

Hi,

My customer has question about TPS61185.
Could you tell me about questoin?

[Question]
 Is there thermal data in close to under the following condition?

 - Condition -
 Vin=6V, 11V, 21V
 LED=9S8P
 Iled=20mA/ch
 fsw=1.25MHz
 L=4.7uH
 Ta=25degreeC

 My customer wants package rise temperature is less than 22 degreeC.
 They wants reference data.

Best Regards,
tateo

  • 0
    Guru 10890 points

    Hi, my customer has more questions.
    Could you help us?

    - When Rfsw is set 475k(fsw=1.26MHz), how much is the variation of the switching frequency?
      My customer wants to avoid the frequency is between 1.62MHz to 1.98MHz.

    - Can the device be set two strings configuration?

    Best Regards,
    tateo

  • 0 in reply to tateo yamashiro
    TI__Expert 3340 points
    Hi, I am afraid we don't have the thermal data for this specific operation condition. cause the final thermal number depends on many variables ( PCB layout, power loss, thermal design etc). the only thermal reference we can provide is the thermal parameter table in datasheet.