Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
What is Vin and how much power is delivered to the load? You will haveHi All,
I'm building a boost converter now. I would like to know which IC is
suitable for doing so. For,
Vout = Vin + 10V
Any suggestions would be very appreciated. ^.^
Will
1MHz SEPIC, miniDIP, 3-40V, very nice. And the LM3488, even nicer.As Fred said, we need to know Vin. Check out National's LM3478.
Low cost, high frequency. Nice chip.
The LM3488 can be synchronized, something that opens up applications1MHz SEPIC, miniDIP, 3-40V, very nice. And the LM3488, even nicer.
http://www.national.com/pf/LM/LM3488.html DigiKey $1.90, qty 25
Besides taking some control of the EMI scene, what comes to mind?1MHz SEPIC, miniDIP, 3-40V, very nice. And the LM3488, even nicer.
http://www.national.com/pf/LM/LM3488.html DigiKey $1.90, qty 25
The LM3488 can be synchronized, something that opens up applications
beyond switch mode converters.
Isn't that a task that's better done with phase-shift controllersAlso, it could function as a drive of an RF power generator where the
output amplitude is precisely controlled via PWM and not some power-hog
scheme where the voltage of the final amp is regulated.
Yes, that would be a great chip for this but it costs four times asAlso, it could function as a drive of an RF power generator where the
output amplitude is precisely controlled via PWM and not some power-hog
scheme where the voltage of the final amp is regulated.
Isn't that a task that's better done with phase-shift controllers
like TI's ucc3895, "BiCMOS Advanced Phase Shift PWM Controller"?
Last year I made a 500W H-bridge RF generator that continuously
drives a resonant transformer + 6-feet of coax to 10kV, with an
ucc3895, an hip4081A and four FETs. Plus a bunch of other stuff
so it's precision controllable from 10V to 10kV.
Sounds like you're developing an ion-beam "cutter" or something! ;-)Joerg wrote...
Also, it could function as a drive of an RF power generator where the
output amplitude is precisely controlled via PWM and not some power-hog
scheme where the voltage of the final amp is regulated.
Isn't that a task that's better done with phase-shift controllers
like TI's ucc3895, "BiCMOS Advanced Phase Shift PWM Controller"?
Last year I made a 500W H-bridge RF generator that continuously
drives a resonant transformer + 6-feet of coax to 10kV, with an
ucc3895, an hip4081A and four FETs. Plus a bunch of other stuff
so it's precision controllable from 10V to 10kV.
You know what I think? I think we'd all better keep a sharp eyeHere is another idea: Suppose you'd run the LM3488 at 400KHz since
that's a frequency it really likes. There will be faint harmonics up
into the FM radio range, and hopefully under the FCC limits. Now you
could gently FM modulate so it comes out just right in a regular FM
radio, on every other channel. If you can afford the larger magnetics
and run at 200KHz it hits every channel. Now the switcher can 'talk'.
So nobody has to read some expensive LCD in the dark. Just wait until
there is a break during the Red Sox game, place the radio on top and the
switcher says "I am running at three point four amps and 96 Fahrenheit.
The controller reports no power outage since o-niner-zero-zero. Thank
you for trusting this fine product from Super-Duper Gizmo Corporation".
Now that would be a wacky use, wouldn't it?
Well, 1MHz is in the AM band and there are switcher chips that can evenI even went back and reviewed the thread, wondering WTF you're talking
about here - a 1 MHz chip isn't fast enough to do AM in the broadcast
band by class D, and PWM and AM are as similar as, well, PWM and AM. You
could amplitude modulate a carrier with a PWM pulse train, but that would
give you, all together now, PWM. I'm obviously confused here[0] - I guess
I simply can't parse "AM transmitter with it that is PWM modulated".
?????Hi Winfield,
The LM3488 can be synchronized, something that opens up applications
beyond switch mode converters.
Besides taking some control of the EMI scene, what comes to mind?
Oh, lots of stuff. It should, for example, be possible to design a
little AM transmitter with it that is PWM modulated. $1 might be a bit
on the pricey side for this application though.