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My understanding is that, contrary to GP's comment, the EU didn't 'mandate microUSB'. The original MoU required the manufacturers[1] to get together to decide o
by SEMW 13y ago
My understanding is that, contrary to GP's comment, the EU didn't 'mandate microUSB'. The original MoU required the manufacturers[1] to get together to decide on a common external power supply "to allow for full compatibility and safety of chargers and mobile phones". So while officially CENELEC decided the standard, in practice they were never going to not adopt the manufacturers' recommendation, which was microUSB.
As for amount of power, I believe the USB power delivery spec allows 5V devices to draw up to 10W of power (5V at 2A) - though it's fairly new (2012), so I don't know how widely used it is yet.
[1] Motorola, LGE, Samsung, RIM, Nokia, SonyEricsson, NEC, Apple, Qualcomm, Texas Instruments
- speleding 13y agoYes, the EU only mandated that the industry choose a common standard so they picked the cheapest of all the options they had. With the newer spec you can indeed draw more power but it requires hardware negotiation to prevent older devices catching on fire. Some of the other options on the table at the time were much more elegant and extensible to, for example, household appliances (USB is not allowed for use in the bathroom or kitchen). The other options were a few cents per connector more expensive so they never had a chance when the EU decided to leave it to the industry.