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UCC2897A: Maximum temperature variation

Ryotaro Fukui
Intellectual 2345 points
Part Number: UCC2897A

Hello team,

I received a question from my customer about temperature rise of UCC2897APWR and UCC27511DBVR.

Vdd=12V　frequency=200kHz
　①Active-Clamp PWM Controller　 UCC2897APWR
　②Gate Driver　UCC27511DBVR

Though the temperature rise will vary depending on electrical use conditions and implementation, their circuit is not completely defined yet.

But they would like to estimate it by knowing how much the maximum temperature rise variation will be under described conditions.

Is this information enough to guess the temperature variation? If they should provide information about the entire circuit, I would be happy to receive your comment.

Best Regards,

Ryotaro Fukui

  • 0
    TI__Guru 59505 points

    Hi,

    The temperature rise is estimated by total power dissipation on each device. You need to calculate total power dissipation of each device then use each datasheet thermal information to estimate each device temperature rise.

    So an overall completed design (including all components selected) is needed in order to make estimation. Partial circuit cannot give you temperature rise estimation.