TL5209DR thermo issue

Jacob Hu

Prodigy 120 points

Other Parts Discussed in Thread: TL5209

Dear Sir,

Could you recommend the thermo area of PCB(high K, JESD 51-7) for TL5209DR(SOIC), Vin=6V, Vout=5V@0.5A

Thanks

Jacob

over 14 years ago

0 Ron Michallick over 14 years ago

TI__Guru**** 164726 points

Hello Jacob,

Are you asking the junction temperature for the TL5209 using the standard board at that Vin and load or are you asking for specifics about the standard board itself?

Regards,
Ron Michallick

0 Jacob Hu over 14 years ago in reply to Ron Michallick

Prodigy 120 points

Dear Michallick,

I hope need the dimension information about the standard board itself, but, if possible could you let me know the junction temperature when using this standard board.

Thanks

Jacob

0 Ron Michallick over 14 years ago in reply to Jacob Hu

TI__Guru**** 164726 points

Jacob,

I found this link that has board and trace dimensions. focus.tij.co.jp/jp/lit/an/szza017a/szza017a.pdf

The power disspation is based on quiescent current and output current.

(6V-5V) * 500mA = 500mW
6V * 8mA = 48mW (typical)
Total power 548mW
Tj = Ta + 97C/W * 0.548W or Tj = Ta + 53C

Regards,
Ron Michallick

Power management

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TL5209DR thermo issue