Hi Miki,

We confirm that the RFE1000-48-Y RFE1000-48-Y is functionally the same as the FPS1000-48 except for the differences in the packaging of these two power supplies.  We have other 1000W, 48V output power supplies, but if the FPS or RFE series work for your application, it may be best to stay with them.

Since you are located in Slovakia, you are welcome to visit our European web site at: http://www.lambda-gb.com/public/index.aspx if you want to explore other 1000W power supplies.

Kind regards,

Mel

Hi Again Miki,

You may want to look at TDK-Lambda's model SWS1000L-48 SWS1000L-48 power supplies. These are not rack mountable, but may be of interest since they have low acoustical noise. For specs and details please go to this web site: http://www.lambda-gb.com/public/product_details.aspx?cid=1&t1type=acdc&scid=281

For price and availability, here is an e-mail address you can use:

powersolutions@uk.tdk-lambda.com

Best regards,

Mel

Hello,

Any of the companies you mention above are good sources.  I ran across a novel LED driver circuit that does not use electrolytic caps (which dry out over time).  You can review this design at the following web link:

http://www.epcos.com/web/generator/Web/Sections/Components/Page,locale=en,r=263282,a=2042462.html

Also, you might consider a ready-made power supply since they come with Safety Certs that you must have when operating off the AC line.

Some suggested models are listed at this site: http://us.tdk-lambda.com/lp/products/ledsigns.htm .

Good luck with your project.

Mel

Hi Geoff,

I don't have experience with the Linkswitch 613.  But if you Google "AC-DC 5V 1W power supply" you will see some possible alternates.  Most commercial AC-DC power supplies begin at 5W of output power.  I know this is more power than you need, but it may be a more reliable solution for you.  You may want to review a 5V, 5W power supply (model KPSA5-5) at this website: http://us.tdk-lambda.com/lp/products/kpsa-series.htm

Best regards, Mel

Hi Geoff,

You should be able to get assistence with your LinkSwitch questions at this website:

http://www.powerint.com/en/products/linkswitch-family/linkswitch-ii

Yes, capacitors of all types have become scarce, due in part to the Japanese earthquake and tsunami.

Hopefully, this situation will clear up soon.

Mel

Mel,

I'm using an LMC7660 LMC7660 charge pump to provide power to an LM4562NA/NOPB. LM4562NA/NOPB. op amp in an audio EQ. The problem is the LMC7660 LMC7660 operates at 10khz and provides a whine onto Vee. My question is ;  if I use a low pass filter  to cut out the 10khz what would be the ideal choice of components to remove the hum and try to maintain some sort of efficiency. Ideally squeezing out as much power as I can. I was thinking around R=47ohm (to limit Volt drop) and changing Cr to around 33uf  and putting the same filter on the V supply to the charge pump giving good roll off but I don't know what effect this will have on the device ? Any ideas?

Hi Mel,

Please can you help me choose a suitable switching regulator? I need to step a DC42V lithium ion battery current down to 4.2V to drive a GSM modem. Most of the time the GSM modem only uses about 2mA of power but it occasionally bursts up to 2A for short 4ms periods during transmission. I need the conversion to be as efficient as possible so as not to flatten the lithium ion battery. I tried an Allegro A8499 but it kept cutting out when the 2A transission bursts happened. Do you know any switching regulators that are suitable for this kind of conversion.

Thankyou and best regards,

Harley