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Can anyone help me with an schematic for dc-dc boost converter,from 3.5-3,7V to 5V to charge a phone? Answered

Hello everyone !! I need a schematic for boost converter but with basics components,i need to find them in my country and not very much to cost. I need it for charge my phone from another cell battery with 3,7V. Like an portable charger. Please help !!

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danyelo (author)2013-12-12

Thank you so so much. But i have one question as a nobbie:
in this chematic i cant find 2SA616, can i use something else? an equivalent? http://i40.tinypic.com/i4qu03.gif

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danyelo (author)danyelo2013-12-12

But in this 2 schematic, this one and the first schematic from the header comment what is the maximum mA.
http://i44.tinypic.com/2wgwyt2.jpg

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Josehf Murchison (author)danyelo2013-12-12

These are 1 watt 500 ma transistors that will work.

SS9012 – SS9013

2N9012 – 2N9013

2N5086 – 2N5088

2N5087 – 2N5089

You can get the data sheets here:

http://www.maxim4u.com/

Joe

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iceng (author)2013-12-11

Classic inductors huh,

Here you go with a pic of the smallest inductor Ive seen :-)

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danyelo (author)2013-12-11

thank you everyone but is not what i need. a classic one with inductors? i want to learn from it too. i`m a beginner and a student !! so...

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danyelo (author)2013-12-11

I`m from romania. I want to make a boost converter from 3,7V to 5V to charge my iphone. i dont have much money so i need i cheap schematic if you know.

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MrRedBeard (author)danyelo2013-12-11

Will TI ship to you? I posted the link below but they give free samples. You will have to sign up for an account. http://www.ti.com/product/tps63002

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MrRedBeard (author)MrRedBeard2013-12-11

The schematic is detailed here https://www.sparkfun.com/products/10255

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iceng (author)2013-12-11

Here is probably the most cost effective circuit I know.
Except a joule-thief.

And you could have more money
if you stayed away from girls.

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MrRedBeard (author)2013-12-11

Here's one with free samples from TI. http://www.ti.com/product/tps61240#samplebuy or http://www.ti.com/product/tps63002

SparkFun
https://www.sparkfun.com/products/10255

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danyelo (author)2013-12-11

i had seen that, but i cant find MAX756, can you give me an equivalent for him?

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steveastrouk (author)danyelo2013-12-11

It would help if you put your actual country in your profile.

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mpilchfamily (author)2013-12-11

This article will go a long way to helping you design your own boost converter. 
http://learn.adafruit.com/minty-boost/process

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