IIRC, only diff was a remote on/off capability, so sure --
I'd appreciate any help you can offer.

Thanks,
-Neil.




> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Tal
> Sent: Saturday, March 01, 2003 5:22 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: DC-DC converter woes?
>
>
> I have used LM2587T12.
> Is it help you? do u need any info?
>
> Tal
>
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On
> Behalf Of PicDude
> Sent: Sunday, March 02, 2003 12:10 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: DC-DC converter woes?
>
>
> Any of you folks used the LM2588 switcher (or similar) before?  I've been
> having probs w/this chip, so I whittled it down to a very small/simple
> circuit now, but I still can't get it to work.  For this, I'm
> using a fresh
> LM2588 (from a different order), so I doubt that the chip is at fault.
>
> My circuit (see attached circuit, which was created with NS's SMS tool)...
> ==========
> - Input is a 9V battery, and I have a 50-ohm load at the output.
> - Transformer is a FT50-43 toroid core wound with 9 turns of 18-gauge wire
> for the primary and 2 turns of 20-gauge wire for the secondary.
> Schottky is a 1N5822.
> - For voltage divider R1,R2 I'm using a 1.8k and a 3K.
>
> My results...
> ==========
> - Vout is 0V.  Bad.
> - At the Vin terminal on the chip I get 9.1V.  Good.
> - At the SW terminal (DMM set to DC Volts), I get 9.1V, and on AC Volts I
> get 0V.  Not good....?
> - The chip warms up very, very mildly.  Enough to know it's getting power,
> but nothing to worry about.  (The last circuit I built with one of these
> overheated till to the point of burning my finger and then smoked.)  But
> this seems good.
>
> I've tried switching the output winding polarity in case I
> accidentally got
> that wrong, but that did not help any.
>
> Unfortunately, no oscope with me here, so I really can't see what's
> happening.  Anyone have thoughts on what may be wrong here?  The
> only thing
> I I'm unsure about is if 2 turns on the toroid is enough.  Only
> other option
> (that I have with me) is a T130-3 with 34 and 9 turns for pri/sec resp.
>
> Cheers,
> -Neil.
>
>
>
>
>
>
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