I have some rather esoteric requirements and wanted to see if there were any suggestions for part/designs
1) Input Voltage can range from 3 to 9 volts - 1 or 2 LIi-Ion batteries (High capacity)
2) Output power - adjustable from 2 watt to 50 watt min (client is looking to get to 100 watt eventually)
Control of this power can be accomplished by external means but a digital control would be preferred
3) Output to drive resistive load from about 2.5 ohms down to about 0.5 ohm.
4) The design must fit in a hand held unit with limited cooling but duty cycle is small; On 2 to 5 seconds Off for a minute or more.
board area is approximately 3" x 0.825" with limited height requirements, maybe 0.25" on top side and less than 0.06" bottom side
5) Cost is always a factor and I am looking at 10,000 pcs BOM and Assembly (power supply only) < $6.00
6) expected annual usage to exceed 100,000 units - This is no joke or exaggeration.
Thanks for your suggestions
Dante
Visions Engineering Services, Inc
dg@visionseng.com