Revision as of 21:02, 25 June 2008

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Multi Channel Battery Charger

==

AC In: IEC for 120/220VAC
DC In: 10VDC to 28VDC 2 Pin connector that mates with whats on the GP solar blanket.
USB B connector (Its a USB device)
2 cables with XO DC jacks on them

The CPU is an Atmel At91SAM7x family part.
- See http://www.atmel.com/dyn/products/product_card.asp?part_id=3754
The per battery DC-DC charger is a SEPIC design based around a MicroChip MCP1631 part

@@ Line 29: / Line 29: @@
 * http://dev.laptop.org/git?p=projects/supercharger;a=summary
-== Mechanical ==
-* '''Density'''.  Getting as many batteries as possible in as small a footprint is a goal.
-* '''Physical Safety'''.  Its got to be stable and hold lots of heavy batteries but not be able to fall over on top of a child who might be trying to climb on it to get his battery.
-* '''Stackable'''.  More vertical space is available than floor sq footage so an idea was to make them stackable.  But see above point.
-* '''Heat dissipation'''.  Input stage power supply is about 85% (DC/DC may be higher). 2nd stage is 82%. So while on DC heat dissipation will be around 64 Watts and on AC around 98 Watts.  (Calculated.  Not yet measured)
-* '''Enclosure'''. Metal. Except perhaps for some plastic for the battery holder.   Having metal available to heatsink to should help in keeping the electronics from burning up in hot countries.
 == Datasheets ==