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I am building a companion board with the Compute Module, USB & ethernet capability and running it 24/7 is part of the requirement. The standard practice would follow and use the same USB to Ethernet controller reference design from standard Pi Model A/B, LAN9512 or LAN9514 from Microchip.

As mentioned here Raspberry pi too hot ? Let’s do something about it !, I too find this chip is relatively VERY HOT (60'C)!

LAN9512 60'C

My operating environment involved running it 24/7 in a closed chassis where ventilation is usually bad. Fire hazard or chip burnt due to overheating is the last thing I want to see on my product.

My question is, is there any alternative ICs out there which dissipates much lower heat with the same functionality (USB host + Ethernet)? OR is there any 2 separate chip (USB host & Ethernet) which can archive the same end goal? I have no idea why Raspberry Pi Foundation chooses this chip in the first place, is so hot and bad for long-term operation

*Putting a small fan or bigger heatsink (I already had heatsink installed on top on both BCM2835 and LAN9512) is not the solution I am looking for, I like to seek a more energy efficient engineering solution

  • you gotta... chill out. It won't burn out. It's built to handle temps way hotter than that. – Gene May 30 '16 at 9:59
  • @PandaLion98 according the datasheet, it was design to up to 70'C (commercial version) & 85'C (industrial version), and I am living near the equator. Even after I put a heatsink, it still feels very hot when touching it – Dennis Jun 1 '16 at 3:10
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    I am living on the equator. No overheating issues here. For the sense of touch, it is very "hot", but it is very normal for the chip. – Gene Jun 1 '16 at 3:17
  • I build board with LAN9514 for Compute Module, USB & Ethernet and running it 24/7. The operation temperature is around 60 degree so that crushed computer modules raspberry pi V3.0 (I haven't got a problem on raspberry pi V1.1 ). Is there any alternative to replace LAN9514 or solution for raspberry pi V3.0? – Yadu Fitsum Feb 9 '17 at 9:21

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