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Simple DC to DC boost schematic

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LAN_403

Xplorer

Sun Jul 04 2010, 06:47AM

Registered Member #2416 Joined: Sun Oct 04 2009, 04:23AM
Location: Oceanside, CA
Posts: 91

I'm just wondering if anyone has any good links to a simple DC to DC boost driver schematics. I need it to accept an input voltage of about 2.5-5 volts and output 4-6 volts and handle currents of up to an amp. Truth be told I'm building a driver for a 445nm laser diode and I'd like to be able to run it off a single 3.7v battery.

Thanks

-Tony

lightlinked

Sun Jul 04 2010, 10:09AM

Registered Member #2087 Joined: Tue Apr 21 2009, 08:32AM
Location:
Posts: 115

National Semiconductor has pretty good app notes for their range of smps controllers. For a simple boost supply reference there is the minty boost. 3v in 5 v out.

and I think Sparkfun has some simple boards premade. If you want it to also limit the current you could look at some high power LED drivers

Remember that you should implement a low voltage cutoff (3 volts) for li-po/li-ion batteries so they don't get over discharged and die. li-po will be 4.2 v charged so you might need a SEPIC design if you really want 4-6v out from 3-4.2v in.

UltraMagnus

Tue Jul 06 2010, 08:51AM

Registered Member #2875 Joined: Mon May 24 2010, 08:28AM
Location: England
Posts: 42

I don't know if it is any help, but microchip have a "tips and tricks" document here

that explains how to make a uC controlled boost converter.

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