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STM32F407 running temperature.

Question asked by pirie.russell on Dec 2, 2012
Latest reply on Dec 2, 2012 by Clive One
I have made a custom pcb using the stm32f407. the pcb is very small 50mm x 28mm. I have noticed the stm32 runs quite warm though.

Its cooler when in dfu mode. but when running my program its quite warm not hot like hard to touch but just feels a little bit hot.

Is this normal? 

the same program running on the stm32f4 discovery board seams to run slightly cooler (maybe bigger pcb more heat dissipation?)

Im running it at 3.3v with a 8mhz cystal

My program basically had 4 timers running one at 50us that triggers a SPI1 DMA transfer of 128bits. Whist receiving usb packages of 2048bytes 60 times a second.

Should i be worried by this? or does it just run a bit warm due to running at 168mhz

Thanks :)

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