LM4040: LM4040 Rjc

Iwata Etsuji

Expert 6370 points

Part Number: LM4040

Hello team,

Could you please provide the Rjc value of LM4040?

Best regards,
Iwata Etsuji

over 6 years ago

0 Marcoo Z over 6 years ago

TI__Mastermind 19370 points

Hi Etsuji-san,

I do not have this data. I have requested it my internal team and will keep you updated.

-Marcoo Z

0 kai klaas69 over 6 years ago

Guru 140200 points

Hi Iwata,

this datasheet says 98.2°C/W:

www.ti.com/.../LM4040C25-EP

But I think 130...150°C/W is more realistic. It also heavily depends on your layout!

Kai

0 Marcoo Z over 6 years ago in reply to kai klaas69

TI__Mastermind 19370 points

Hi Etsuji,

The data I received is as below:
For the LM4040 DBZ: Theta JC, top = 102.9
For the LM4040 DBZ: Theta JB = 64.3

For the LM4040 DCK: Theta JC, top = 142.9
For the LM4040 DCK: Theta JB = 70.8

-Marcoo Z

Power management

Power management forum

LM4040: LM4040 Rjc