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Hi Everybody, Here's my ideas Here they are again as modified
in the last teleconference: a.
Life
expectancy of 10 years, hopefully more Yes- must have.
This adapter will be more expensive than a standard adapter. It should survive
at least few product cycles. b.
Same
connector for All device and adapter connections if detached cable A 130W (12V, >10A) connector
will not be small, while for a 10W application a customer does not want to see
a bulky connector c.
Power
range >10W – 130W delivered power to device and is brand, model, and year
agnostic d.
First
adapter must work with last device and last adapter with first device. Standard
Compatibility. Yes, but a device must be able to
recognize the adapter and decide if the adapter is suitable e.
Adapter<->Mobile
Device communications required for higher power safety >0.7W (down from 7W ie
12-14v@50ma) Keep communication simple: no
regulation loops via the device. Communication via 1 wire. (multiple wires will only make it more
expensive) Maybe two communication methods: - connect a resistor between communication wire and ground=> the
adapter regulates to a voltage dependent on the connected resistor. For low
cost devices without micro's - connect a smart device that can identify the adapter, set the output
voltage, maximum output current, etcetera A smart adapter can also inform the device about the capabilities.
Not all universal adapters need to be able to supply 130W. Via the communication wire it can say for example: 'I can do 15V, 18V
and 20V. My current limit can be set by steps of 500mA to a maximum of 4A.' Then the device can decide if this adapter is suitable or adapt the
power consumption. e.g. do not charge the battery at full rate when the device
is in full operation. f.
Standard
designed to support Certification testing of adapter and device (and cable) g.
Continuous
communications growth to support growth of UPAMD capability. h.
Basic
power delivery mechanism i.
Must
support regular non-battery and battery powered devices
Yes i.
Device
may be capable of being a source as well as a sink of power No, just a power source, no power sink. i.
To
supply power other devices beyond the USB 10W power range ii. Able to share power
for mission critical or business critical applications if willing Only if this does not make
the adapter more complicated. j.
Make
independent of rapidly changing technology i.
Multiple
battery technologies currently used – no common adapter or battery voltage ii.
Consider
isolation to meet medical power needs No, I do not
believe that medical will use universal adapters. Also this will make all
adapters more expensive for just a few medical applications. Maybe a special version universal adapter that can identify itself
as being suitable for medical applications. k.
Consider
future mobile device design options i. Smaller profiles,
headed for 10mm to 5mm? Different shape devices, non-edge usage Adapter shape and size does not need to have restrictions. I
want to have an adapter that looks like a banana or any other fruit. ;-) l.
Connector
must not mate with any current designs – product Safety issue – no confusion Yes m.
Apply
KISS principle – Keep It Simple Stupid within the other goals.Yes must have. Keep it simple and don't make it much more
expensive than current adapters. With regards, 阿勇 Arjan
Strijker IC architect, Product Line Power & Lighting Solutions (PLS) NXP Semiconductors Gerstweg 2, Room BZ0.103, 6534AE
Nijmegen, The Netherlands Tel: +31 24 353 4661 E-mail: arjan.strijker@xxxxxxx,
www.nxp.com |