12 volt --> 5 volt buck converter

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scaru
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12 volt --> 5 volt buck converter

Does anyone know of a place in the US that sells something that can buck 12 volts down to 5 volts at around 50 watts minimum? Efficiency is not particularly important, also anywhere from 5-9 volts should work. 

sanka
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If you are looking for a finished board, this isn’t very useful information for you. But if you want to build up from the driver chip, the Linear LT3791 driver can take in 6-36V and put out Vin minus 2V at about 20A. It can be had for about $6 in single or small quantities. I think it is rated at 94% efficiency or thereabouts.

Here is the data sheet: http://cds.linear.com/docs/en/datasheet/3741fb.pdf

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Pulsar
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http://www.ebay.com/itm/waterproof-DC-DC-Converter-Regulator-9v-35v-12V-...DOWN-to-5V-50W-10A-/271064637424?pt=US_Power_Inverters_&hash=item3f1cb61ff0

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Not US but Mouser etc might do something similar:

http://uk.rs-online.com/web/p/non-isolated-dc-dc-converters/0462013/

Woody

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scaru,
have you looked at TaskLed drivers?

scaru
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Pulsar wrote:
http://www.ebay.com/itm/waterproof-DC-DC-Converter-Regulator-9v-35v-12V-...

That should work, unless there are other suggestions I'll go with that one. 

Pulsar13
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A cheap computer PSU will provide plenty of 5V and 12V power. Why convert when you can have both for cheap.

Pulsar
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he may be trying to run it off a 12v battery

scaru
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Pulsar wrote:
he may be trying to run it off a 12v battery

Exactly. Wink

PilotPTK
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Battery Positive -> Big Diode -> Big Diode -> Big Diode -> Big Diode -> Big Diode -> Big Diode -> Big Diode -> Load -> Battery Negative

Smile

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I am currently extremely busy with work. Please do not expect a response from me quickly. I will be dropping in as time permits, but the amount of time I can dedicate to responding to topics and PMs is very limited.

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scaru wrote:
That should work, unless there are other suggestions I’ll go with that one. 

You will have to heatsink (or fan) the crap out of it to get the full 50W…

fyesilova
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link

Not in US, but it is what you want.
I do not know the quality of these but 10A is very high and it is possible to heat up.

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fyesilova
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this one may be better, it has a good heatsink, and you can screw it to a metal on your car for better heat dissipation.

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