Hello All,
I have built an SMPS based on MAX1523. It works but does not have the desired current, nor is it controlled by my Pro Trinket. I am in need of some design help here. My goal is as follows.
Vin: 3.7 - 4.2 (single cell 18650 battery 2500mAH 25A)
Vout: 3 - 5
maxA: 10
I will be connecting a very small heating element 2mm x 8mm these range in resistances from 0.2ohm to 1.8ohm.
I am not married to the MAX1523. Any IC with any footprint is acceptable at this point. I would however like to keep the inductor as small as possible.
Thank You, John
SMPS Needed
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Please be positive and constructive with your questions and comments.
- Franklin97355
- Posts: 23912
- Joined: Mon Apr 21, 2008 2:33 pm
Re: SMPS Needed
We do not provide design services but I will move this to the General Project forum and perhaps someone there can help.
- zener
- Posts: 4567
- Joined: Sat Feb 21, 2009 2:38 am
Re: SMPS Needed
Since you want buck AND boost, and quite a bit of current, that is not a "vanilla grade" design as my boss used to say. It is not necessarily a simple thing to do yourself. However, you can go here:
http://www.ti.com/lsds/ti/analog/webench/power.page
and plug in your parameters and it should spit out a design for you.
Good luck!
http://www.ti.com/lsds/ti/analog/webench/power.page
and plug in your parameters and it should spit out a design for you.
Good luck!
- bumba000
- Posts: 128
- Joined: Sat Sep 05, 2015 12:10 pm
Re: SMPS Needed
Oh my goodness. I just found your response and I thank you. However, I found this myself watching some youtubes by texas instruments earlier. Trouble is I don't know circuits well enough to know if it just gave me the correct answer or a line of BS. I have though for a week or so now been following along with video tutorials by a guy named Dave Jones of eevblog and chatting with folks involved there via IRC. I have just come across a DIY 0-6v lab power supply (3 vid) tut by Dave on youtube. This along side or combined with what I've built based on the max1523 seems pretty close. His DIY 0-6v supply can be driven by arduino pwm. I think I'm getting pretty close now, but have seen and heard enough that I want to dig my eyes out at this point. Sure would be nice if some really cool person would send over an schematic and parts list!
Maybe I'll have a go at that webench again on a fresh brain and some well rested eyeballs.
Thank You & Good Night, John
Maybe I'll have a go at that webench again on a fresh brain and some well rested eyeballs.
Thank You & Good Night, John
Please be positive and constructive with your questions and comments.