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Old 14th May 2011, 06:47 PM   #221
codegen is offline codegen  Norway
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And what is operating frequency?
 
Old 17th May 2011, 04:23 PM   #222
Cristi is offline Cristi
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Switched Mode Power Supplies (SMPS)
Quoted from the email which i sent you today, might be useful for others too till i get the manual ready:
the size of the power supply board is 264x140mm and the height is about 55 mm.
the output voltage for the current version is not adjustable, it is proportional with input voltage, +-5-10%.
the caps from the secondary side are low ESR long life electrolytics, chosen depending on the working voltage and required minimum capacitance. there are 8 capacitors for the first tier rails and another 6 caps for the second tier rails.
the output usable power in audio applications, with a crest factor of 3 or more is 3600W, for continuous operation, the maximum continuous power is about 3 times smaller. the average efficiency is around 90%, with peak efficiency of 92.5% at 40% load, for the 230V version, 2x80V output and 2x120V output. switching frequency is fixed, around 100KHz.
 
Old 21st May 2011, 04:09 PM   #223
Cristi is offline Cristi
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Switched Mode Power Supplies (SMPS)
The rectifier bridge of the SMPS3K6 is rated at 50A and can withstand the average and peak current required by the power supply. please note that this power supply is intended for audio applications where the crest factor (peak to average ratio) is at least 3. The average power consumed by an audio amplifier is at most 1/3 of its rated output power, so the power supply can be thermally designed to withstand 1/3 of this power but electrically able to sustain the nominal and maximum power. in other words, with a bigger heatsink and forced air cooling should be able to deliver the rated power. I used a E55 transformer on the current boards and on the earlier prototype ETD54. any of them can sustain the required power. Double stacked EE65 cores are only required if the output power is huge, around 6-10KW or the switching frequency is very low, 20-30KHz. i also use 6x2200uF capacitors, so in total 13200 uF as can be seen in the picture.

Last edited by Cristi; 24th May 2011 at 12:25 PM.
 
Old 21st May 2011, 08:44 PM   #224
thomaspf is offline thomaspf  United States
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Default Power supply(s) for 300W LME49810 Audio Amplifier?

Hi Cristi,

if I wanted to power 2 of your 300W LME49810 Audio Amplifier modules with switched power supplies all integrated into a single case. Which of your power supplies do you recommend?

As far as I understand the manual you need +/- 61V for the power stage and +/- 67V for the driver stage.

Can you potentially share a single PSU for the driver stages and get seperate ones for the power stage of each channel?


Cheers

Thomas
 
Old 22nd May 2011, 03:27 AM   #225
Cristi is offline Cristi
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Switched Mode Power Supplies (SMPS)
The most suitable power supply for the LME amplifiers, which can deliver the auxilliary voltage as well and has enogh power is the SMPS500R. the auxilliary voltage can be set to a slightly higher value than the main voltage. for each amplifier module one power supply is required, so for a stereo amp, 2 amplifier modules and 2 power supplies are required.
 
Old 22nd May 2011, 03:41 AM   #226
thomaspf is offline thomaspf  United States
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Thank you for the quick response. So which model of the SMPS500R would I actually need. I worked my way through all the manuals on your WEB site and I was under the impression that the SMPS5000R is a single symmetric voltage supply with an aux voltage of 5V, 10V, or 15V.

How do I get the +/- 67V for the driver stage?

Would I simply feed the same voltage to both driver and power stage and order two SMPS500R72V?

Cheers

Thomas

Last edited by thomaspf; 22nd May 2011 at 03:45 AM.
 
Old 22nd May 2011, 04:02 AM   #227
Cristi is offline Cristi
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Switched Mode Power Supplies (SMPS)
The auxilliary voltage or the SMPS500R is not regulated, thus can take several values, from +-12V up to about +-70V the exact value of this voltage depends on the auxilliary winding turns ratio, and should be multiple of volt/turns or in special cases multiple of half volt/turns + 1 for example if the main output is +-60V then the aux can be +-60V, +-65V or +-70V.
the SMPS500RS auxilliary voltage is regulated by a 78xx series linear regulator.
don't forget to mention the value of the voltages which you need when you place the order, and please consider that the transformer must be custom made, no additional charge, but it takes about one week more than the standard ones.
 
Old 22nd May 2011, 04:10 AM   #228
thomaspf is offline thomaspf  United States
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Hm, there is no SMPS500RS on your WEB site?

If I understand you correctly you basically would build a custom supply with

approx +/- 61V on the main windings and
approx +/- 67V on the aux side.

How would I go about ordering a pair?

Cheers

Thomas
 
Old 22nd May 2011, 04:55 AM   #229
Cristi is offline Cristi
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Switched Mode Power Supplies (SMPS)
this is the SMPS500RS Connexelectronic
just leave a note about the voltages which you need and will be configured for that voltages. anyway now i should recognize your name from when you place the order.
 
Old 2nd June 2011, 03:59 AM   #230
alant4321 is offline alant4321  Germany
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Cristi,

Among your 500W output SMPS, there are four choices:
1) A500SMPS
2) C500SMPS
3) SMPS500QR
4) SMPS500R

May you give a short briefing to customer about the difference for application:
For both Main and Aux. outputs:
1) Regulated or Unregulated
2) Voltage output: Norminal + tolerance(%)
3) Current output (Max)
 

 


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