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Topic: looking for a DC-DC 12v boost converter (Read 1 time) previous topic - next topic

sirbow2

im looking for a DC DC boost converter for a car's battery ~10-15v to my laptops charger output (19v, 2.15A when charging). it doesn't make sense to use an inverter to: 12v DC -> 120V AC -> 19v.

im thinking:
Vin: 0-20v
Vout: 10-20V or so.
Aout: <=10A

i was looking at: http://www.linear.com/product/LTC3786 or http://www.ti.com/product/tps55340 or http://www.ti.com/product/tps61175 but all the ones i have seen use transformers. anyway around this, or to get it slimmed downed?
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mauried

By transformers , do you mean inductors?
If so, its not possible to make a boost converter without an inductor or transformer.

sirbow2

http://dduino.blogspot.com all my Arduino/electronic projects!!!

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mauried

These types of converters are quite common.
Heres an example.
http://www.bixnet.com/12vdcto19vdc.html

They are tricky to build unless you can get the proper ferrites for the inductors,
so I wouldnt recommend building your own.

sirbow2

good info. id probably be better off doing something more universal like: http://www.radiolocman.com/shem/schematics.html?di=61516
then i can use anything 120v ac
http://dduino.blogspot.com all my Arduino/electronic projects!!!

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majenko

Buy a universal laptop car power supply off the shelf.  They are cheap, they work well, and they come with a guarantee.  i.e., they're unlikely to blow up your laptop.

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