On 08/30/2016 03:35 PM, Luke Kenneth Casson Leighton wrote: > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Tue, Aug 30, 2016 at 6:51 PM, Joseph Honold <[email protected]> wrote: >> I'm reading the eoma spec at elinux and there is limited information >> regarding the power requirements. It states "a maximum of 3.5 watts should >> be respected" and "Type II Cards should not exceed an average of 3.5 watts >> power consumption" and "must adjust accordingly and stick within the 4 watt >> heat dissipation budget". > > those are practical guidelines. if you want to do an EOMA68 module > that requires 4 to 4.5 watts you should look at flooding it with > thermal gel and sealing it. 3.5 to 4.0 watts you can get away with > using the exact same graphite paper that's used in mobile phones. > > >> Is there a minimum requirement for supply current that must be available to >> the cpu card from a housing/device/socket for compatibility with multiple >> cpu cards (3.5 or 4 watts)? > > there is no minimum requirement. the maximum requirement is 1.0 A @ > 5.0V. above that, housings are REQUIRED to CUT ALL POWER WITHOUT > WARNING, for safety reasons. >
Seems like there should be a minimum power requirement that all cpu cards and devices must meet. What happens if someone makes an ultra low power cpu card that peaks at 200mA and I design my device/housing to meet that 200mA but not higher and I try to plug the A20 card into it? It will be unstable or not work at all. >> What is the A20 cpu card power consumption (average/peak)? > > peak is around 3.5 watts. So, the minimum requirement for the A20 cpu card is ~700mA peak? _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
