Sold/Expired WTB : step-up converter, input 3V, output +1W

Erasmus · Apr 30, 2007

Hi!

I'm going to upgrade someone's 2D cell flashlight. I'm going to replace the dim incandescent bulb by a Cree XR-E (plus McR reflector plus custom heatsink). I'm still looking for a step-up converter with an output of around 1 watt or upto 2 watt. Let me know what you have and a price including priority shipping to Belgium. Thank you!

goldserve · Apr 30, 2007

I can build a simplified piglet with no micro-controller. Single level, buck/boost output at around 350ma/500ma/750ma/850ma

$18 + $3 shipping.

Erasmus · Apr 30, 2007

goldserve said:
I can build a simplified piglet with no micro-controller. Single level, buck/boost output at around 350ma/500ma/750ma/850ma

$18 + $3 shipping.

Interesting! Any efficiency rates or runtime plots available? Minimum and maximum V_in?

BigBoy · Apr 30, 2007

I am looking for a reasonably priced 2.4 v ( 2 x NIMH ) input that will drive a SSC P4 at 1 amp. Any chance a piglet will do that?

goldserve · Apr 30, 2007

BigBoy, the converter is not efficient at driving such high currents. So no, it iwll not do that.

Erasmus,
@ 350ma, the low current is nice and efficient for the driver. Vmin should be around 2.4V and Vmax is 5.5V. AT 3.6V input, you get higher 85+ efficiencies. 3V should not differ too much. Estimate worst case 85% efficiency.

ace0001a · Apr 30, 2007

Sandwich Shoppe has a BadBoy NexGen 1000:
http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=730

But I don't know the shipping costs to Europe...

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Sold/Expired WTB : step-up converter, input 3V, output +1W

Erasmus

Flashlight Enthusiast

goldserve

Flashlight Enthusiast

Erasmus

Flashlight Enthusiast

BigBoy

Enlightened

goldserve

Flashlight Enthusiast

ace0001a

Flashlight Enthusiast

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