Groups > sci.electronics.design > #436155

Re: Achieving 98% efficiency in a boost converter, datasheets

From	Winfield Hill <hill@rowland.harvard.edu>
Newsgroups	sci.electronics.design
Subject	Re: Achieving 98% efficiency in a boost converter, datasheets
Date	2016-11-18 09:13 -0800
Organization	Rowland Institute
Message-ID	<o0ncqv02ube@drn.newsguy.com> (permalink)
References	<nvvrni02lg2@drn.newsguy.com> <275abfbe-5306-41d3-a184-8b0372ca77d7@googlegroups.com> <o060su0265c@drn.newsguy.com> <o070ko0scr@drn.newsguy.com> <o0f16602t7q@drn.newsguy.com>

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Winfield Hill wrote...
>
>Winfield Hill wrote...
>>
>> Winfield Hill wrote...
>>> dagmargoodboat@yahoo.com wrote...
>>>>
>>>> Too many degrees of freedom to answer you Win [ snip ]
>>>
>>> Thanks, your comments are right on target and can kick
>>> off the discussion I was hoping to see.  I'll get into
>>> that conversation tomorrow.  But in the meantime I've
>>> updated my draft schematic and PCB layout, adding more
>>> features and items relevant to the discussion.
>>> https://www.dropbox.com/sh/aj1tlto0fa6w6ty/AADJ9BWmCQE_ed7NHp60PgMja?dl=0
>>>
>>> Here's an inducement: anyone who'd like to experiment
>>> with issues and concepts embedded in the RIS-767
>>> board, I'll send you two blank PCBs to play with.
>>> You just have to talk about what you learn, should
>>> you get around to learning anything!
>>
>> I've added a folder of datasheets to dropbox.
>
> Schematic and PCB layout further updated, adding
> a wider range of test component footprints.  

 Further update, nearly finished.  Added 2-channel
 SMU connections for quick data.  Opinions please.

> I've been concentrating on inductors lately, and
> am almost ready to order the PCB.  Anybody wants
> two blanks, let me know so I can increase my order.

 I've practically given up on commercial inductors,
 can't seem to get Qs over 25 to 40 at 300kHz.  :-(
 So I wound my own, 100uH, 20 turns of #18 wire on
 an RM8 core, gapped for A_L = 250.  Yeah, Q = 125.


-- 
 Thanks,
    - Win

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Thread

Achieving 98% efficiency in a boost converter Winfield Hill <hill@rowland.harvard.edu> - 2016-11-09 11:00 -0800
  Re: Achieving 98% efficiency in a boost converter sea moss <danluster81@gmail.com> - 2016-11-09 20:12 -0800
  Re: Achieving 98% efficiency in a boost converter "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-11-09 22:27 -0600
    Re: Achieving 98% efficiency in a boost converter bill.sloman@ieee.org - 2016-11-10 04:07 -0800
  Re: Achieving 98% efficiency in a boost converter Winfield Hill <hill@rowland.harvard.edu> - 2016-11-11 02:08 -0800
  Re: Achieving 98% efficiency in a boost converter dagmargoodboat@yahoo.com - 2016-11-11 13:44 -0800
    Re: Achieving 98% efficiency in a boost converter, inducement Winfield Hill <hill@rowland.harvard.edu> - 2016-11-11 19:05 -0800
      Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-12 04:06 -0800
        Re: Achieving 98% efficiency in a boost converter, datasheets dagmargoodboat@yahoo.com - 2016-11-12 05:40 -0800
          Re: Achieving 98% efficiency in a boost converter, datasheets dagmargoodboat@yahoo.com - 2016-11-12 05:54 -0800
          Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-12 06:33 -0800
            Re: Achieving 98% efficiency in a boost converter, datasheets Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-11-12 07:58 -0700
              Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-15 05:29 -0800
            Re: Achieving 98% efficiency in a boost converter, datasheets bill.sloman@ieee.org - 2016-11-12 20:08 -0800
              Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-13 18:29 -0800
          Re: Achieving 98% efficiency in a boost converter, datasheets Clifford Heath <no.spam@please.net> - 2016-11-13 09:08 +1100
            Re: Achieving 98% efficiency in a boost converter, datasheets dagmargoodboat@yahoo.com - 2016-11-12 16:48 -0800
              Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-16 18:00 -0800
                Re: Achieving 98% efficiency in a boost converter, datasheets bill.sloman@ieee.org - 2016-11-17 18:41 -0800
                Re: Achieving 98% efficiency in a boost converter, datasheets dagmargoodboat@yahoo.com - 2016-11-18 09:37 -0800
        Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-15 05:05 -0800
          Re: Achieving 98% efficiency in a boost converter, datasheets Winfield Hill <hill@rowland.harvard.edu> - 2016-11-18 09:13 -0800

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