LMZ31710: Thermal resistance

Hirotsugu Kobayashi

Part Number: LMZ31710
Other Parts Discussed in Thread: LMZ31707, LMZ31704

Hi team,

The thermal resistance of LMZ31710 does not match the notes.
LMZ31704 and LMZ31707 in the same series are defined by Θja, Ψjt, and Ψjb.
What is the correct thermal resistance for the LMZ31710?

Best Regards,

over 1 year ago

0 Eileen Hernandez Hernandez over 1 year ago

TI__Intellectual 2998 points

Hi Hirotsugu,

Please see the thermal resistance graph for LMZ31710 below:

https://www.ti.com/lit/an/snva848a/snva848a.pdf#page=6

Regards,

Eileen

0 Hirotsugu Kobayashi over 1 year ago in reply to Eileen Hernandez Hernandez

Mastermind 8915 points

Hi Eileen,

No, my question is the correct value of Ψjt.
The datasheet notes RΘjb as Ψjt and Ψjt as Ψjb.
Other products have Ψjt of 1.6°C/W.
Isn't it a typo?

0 Eileen Hernandez Hernandez over 1 year ago in reply to Hirotsugu Kobayashi

TI__Intellectual 2998 points

Hi Hirotsugu,

The correct values are in the LMZ31707 and LMZ31704 datasheet. LMZ31710 seems to have a typo on thermal section. Ψjt should be 1.6°C/W.

Regards,

Eileen

0 Hirotsugu Kobayashi over 1 year ago in reply to Eileen Hernandez Hernandez

Mastermind 8915 points

Hi Eileen,

Please correct the datasheet.

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LMZ31710: Thermal resistance