Forums

Boost Converter Tutorial?

Started by Jim Thompson February 11, 2012
In the past I have designed boost converters in burst mode, with peak
current control, but never with a PWM-controlled loop.

Outputs: +5 @ 25mA, -5V @ 20mA

Can someone point me to a tutorial?

Thanks!

[Don't point me to an off-the-shelf part.  This has to go into a
_custom_ chip... just a little thing... 1mm x 25mm :-]
		
                                        ...Jim Thompson
-- 
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Jim Thompson wrote:
> > In the past I have designed boost converters in burst mode, with peak > current control, but never with a PWM-controlled loop. > > Outputs: +5 @ 25mA, -5V @ 20mA > > Can someone point me to a tutorial? > > Thanks! > > [Don't point me to an off-the-shelf part. This has to go into a > _custom_ chip... just a little thing... 1mm x 25mm :-]
Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, right? Cheers Phil Hobbs
On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>Jim Thompson wrote: >> >> In the past I have designed boost converters in burst mode, with peak >> current control, but never with a PWM-controlled loop. >> >> Outputs: +5 @ 25mA, -5V @ 20mA >> >> Can someone point me to a tutorial? >> >> Thanks! >> >> [Don't point me to an off-the-shelf part. This has to go into a >> _custom_ chip... just a little thing... 1mm x 25mm :-] > >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, >right? > >Cheers > >Phil Hobbs
Nope. It goes in something that virtually every person owns :-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Feb 11, 1:26=A0pm, Jim Thompson <To-Email-Use-The-Envelope-I...@On-My-
Web-Site.com> wrote:
> On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs > > > > > > > > > > <pcdhSpamMeSensel...@electrooptical.net> wrote: > >Jim Thompson wrote: > > >> In the past I have designed boost converters in burst mode, with peak > >> current control, but never with a PWM-controlled loop. > > >> Outputs: +5 @ 25mA, -5V @ 20mA > > >> Can someone point me to a tutorial? > > >> Thanks! > > >> [Don't point me to an off-the-shelf part. =A0This has to go into a > >> _custom_ chip... just a little thing... 1mm x 25mm :-] > > >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, > >right? > > >Cheers > > >Phil Hobbs > > Nope. =A0It goes in something that virtually every person owns :-) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 ...Jim Thompson
> -- > | James E.Thompson, CTO =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0| =A0 =A0mens =A0 =A0 |
> | Analog Innovations, Inc. =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 | =A0 =A0 et =A0 =A0 =A0|
> | Analog/Mixed-Signal ASIC's and Discrete Systems =A0| =A0 =A0manus =A0 =
=A0|
> | Phoenix, Arizona =A085048 =A0 =A0Skype: Contacts Only =A0| =A0 =A0 =A0 =
=A0 =A0 =A0 |
> | Voice:(480)460-2350 =A0Fax: Available upon request | =A0Brass Rat =A0| > | E-mail Icon athttp://www.analog-innovations.com| =A0 =A01962 =A0 =A0 | > > I love to cook with wine. =A0 =A0 Sometimes I even put it in the food.
Twenty questions! Is it for a tracking chip that goes into people's necks?
Jim Thompson wrote:
> > On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > > >Jim Thompson wrote: > >> > >> In the past I have designed boost converters in burst mode, with peak > >> current control, but never with a PWM-controlled loop. > >> > >> Outputs: +5 @ 25mA, -5V @ 20mA > >> > >> Can someone point me to a tutorial? > >> > >> Thanks! > >> > >> [Don't point me to an off-the-shelf part. This has to go into a > >> _custom_ chip... just a little thing... 1mm x 25mm :-] > > > >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, > >right? > > > >Cheers > > > >Phil Hobbs > > Nope. It goes in something that virtually every person owns :-) > > ...Jim Thompson
So you decided to take someone's advice about what to do with your design? Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
"Jim Thompson" <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote 
in message news:m3cdj7hc1nqt27bn08n86pjmjsdpgl8gtm@4ax.com...
> In the past I have designed boost converters in burst mode, with peak > current control, but never with a PWM-controlled loop. > > Outputs: +5 @ 25mA, -5V @ 20mA > > Can someone point me to a tutorial? > > Thanks! > > [Don't point me to an off-the-shelf part. This has to go into a > _custom_ chip... just a little thing... 1mm x 25mm :-] > > ...Jim Thompson > --
TI app notes? <http://www.ti.com/analog/docs/analogtechdoc_hh.tsp?viewType=mostuseful&rootFamilyId=64&familyId=661&docTitle=boost&docCategoryId=1> The 3525 has been around for a long time... Maybe DN-62 has what your looking for. <http://www.ti.com/product/uc3525b> cheers
On Feb 11, 10:26=A0am, Jim Thompson <To-Email-Use-The-Envelope-I...@On-
My-Web-Site.com> wrote:
> On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs > > > > > > > > > > <pcdhSpamMeSensel...@electrooptical.net> wrote: > >Jim Thompson wrote: > > >> In the past I have designed boost converters in burst mode, with peak > >> current control, but never with a PWM-controlled loop. > > >> Outputs: +5 @ 25mA, -5V @ 20mA > > >> Can someone point me to a tutorial? > > >> Thanks! > > >> [Don't point me to an off-the-shelf part. =A0This has to go into a > >> _custom_ chip... just a little thing... 1mm x 25mm :-] > > >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, > >right? > > >Cheers > > >Phil Hobbs > > Nope. =A0It goes in something that virtually every person owns :-)
What is the power source? I don't think they make batteries that thin.
On Sat, 11 Feb 2012 13:34:08 -0500, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>Jim Thompson wrote: >> >> On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >> >Jim Thompson wrote: >> >> >> >> In the past I have designed boost converters in burst mode, with peak >> >> current control, but never with a PWM-controlled loop. >> >> >> >> Outputs: +5 @ 25mA, -5V @ 20mA >> >> >> >> Can someone point me to a tutorial? >> >> >> >> Thanks! >> >> >> >> [Don't point me to an off-the-shelf part. This has to go into a >> >> _custom_ chip... just a little thing... 1mm x 25mm :-] >> > >> >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, >> >right? >> > >> >Cheers >> > >> >Phil Hobbs >> >> Nope. It goes in something that virtually every person owns :-) >> >> ...Jim Thompson > >So you decided to take someone's advice about what to do with your >design? > >Cheers > >Phil Hobbs
This is but a small portion of the whole chip. As I said, I have no experience (*) with PWM'd boost converters, though lots of those with low output current, running burst mode (they have little or no stability issues). As Larkin would snark, If you've got something technical to say, then say it, otherwise STFU :-{) (*) Unlike some posters lurking here, I readily admit areas of which I have little or no expertise. Then I listen, learn and ultimately become the expert ;-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Sat, 11 Feb 2012 13:36:38 -0500, "Martin Riddle"
<martin_rid@verizon.net> wrote:

> >"Jim Thompson" <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote >in message news:m3cdj7hc1nqt27bn08n86pjmjsdpgl8gtm@4ax.com... >> In the past I have designed boost converters in burst mode, with peak >> current control, but never with a PWM-controlled loop. >> >> Outputs: +5 @ 25mA, -5V @ 20mA >> >> Can someone point me to a tutorial? >> >> Thanks! >> >> [Don't point me to an off-the-shelf part. This has to go into a >> _custom_ chip... just a little thing... 1mm x 25mm :-] >> >> ...Jim Thompson >> -- > >TI app notes? ><http://www.ti.com/analog/docs/analogtechdoc_hh.tsp?viewType=mostuseful&rootFamilyId=64&familyId=661&docTitle=boost&docCategoryId=1> > >The 3525 has been around for a long time... >Maybe DN-62 has what your looking for. ><http://www.ti.com/product/uc3525b> > >cheers > >
Thanks, Martin! I owe you another sip or two or... Though probably at some other location than Long Island. I sent those horse's-asses in Huntington (and only you will appreciate why I say that) an E-mail, "As I sit here in Rochester, in my _office_ (with a _door_), looking out my _window_ at the melting snow, with a _door-pass_ badge hanging around my neck, and with my laptop sitting there connected to the customer's _network_ and the _Internet_, I was thinking of you fellows at @#$%... >:-} " I doubt they'll invite me back ;-) Though you never know... I was the only one who could convey to Cadence what was needed with the "w-real" modeling. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Sat, 11 Feb 2012 11:15:48 -0800 (PST), linnix
<me@linnix.info-for.us> wrote:

>On Feb 11, 10:26&#2013266080;am, Jim Thompson <To-Email-Use-The-Envelope-I...@On- >My-Web-Site.com> wrote: >> On Sat, 11 Feb 2012 13:25:00 -0500, Phil Hobbs >> >> >> >> >> >> >> >> >> >> <pcdhSpamMeSensel...@electrooptical.net> wrote: >> >Jim Thompson wrote: >> >> >> In the past I have designed boost converters in burst mode, with peak >> >> current control, but never with a PWM-controlled loop. >> >> >> Outputs: +5 @ 25mA, -5V @ 20mA >> >> >> Can someone point me to a tutorial? >> >> >> Thanks! >> >> >> [Don't point me to an off-the-shelf part. &#2013266080;This has to go into a >> >> _custom_ chip... just a little thing... 1mm x 25mm :-] >> >> >Hmm, an inch long and a millimeter wide--it's for a robotic cockroach, >> >right? >> >> >Cheers >> >> >Phil Hobbs >> >> Nope. &#2013266080;It goes in something that virtually every person owns :-) > >What is the power source? I don't think they make batteries that >thin.
2.3-5V Battery. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.