TMS320F28335: TMS320F28335ZHHA,getting heated up

Akhil Pillai

Hey,

I have been using TMS320F28335ZHHA, and it's being heated up very soon. I checked for all the voltage levels and they are fine. I have not put a heat sink. It is going till 90 degree in like 1 minute.

Warm Regards,

Akhil Pillai

over 7 years ago

0 Cody Watkins over 7 years ago

TI__Mastermind 42195 points

Akhil,

What is the current draw on VDD and VDDIO?
Are there any other nearby heat sources?

Regards,
Cody

0 ankita prasad over 7 years ago in reply to Cody Watkins

Prodigy 140 points

Hi Cody,

1. the current is being supplied by tps767d301 ldo. The current drawn by the dsp is approx 280 ma. This ldo is kept nearby to the dsp. If there is an email id I can send the schematics for proper understanding.

0 ankita prasad over 7 years ago in reply to ankita prasad

Prodigy 140 points

hi cody,

the pcb is getting heated up. the dsp temperature is going upto 65 degree celsius. is there any layout specs which i need to follow? my circuit is working fine but my pcb is getting heated.. suggest

0 Cody Watkins over 7 years ago in reply to ankita prasad

TI__Mastermind 42195 points

Ankita,

the "A" devices maximum operating temperature is 85C, so you are getting close to this limit. We recommend obvious things like spread out heat sources on the PCB and ensure that you have adequate thermal coupling between the device and the board to spread out the heat.

This app note is not C2000 specific, but it describes some of the factors in heat dissipation:

Regards,
Cody

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28335: TMS320F28335ZHHA,getting heated up