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About Chinese LLC SMPS
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Old 13th February 2019, 12:15 PM   #21
Cresnet is offline Cresnet  Jordan
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Location: AMMAN - JORDAN
About Chinese LLC SMPS
In reality, L6599 needs very low power to act to any over current event. and it has nothing to do with shorting secondary main or secondary AUX, that's as per my current design. Facing such problems with such cheap SMPS is just normal and expected, other SMPS manufactures uses fuses at the AUX output to solve this issue, and its good option.

LLC SMPS is one of the most challenging topology when designing a SMPS. In addition to the poor regulation mechanism used into that SMPS. Hope that helps
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Old 22nd February 2019, 02:51 PM   #22
hansueli is offline hansueli  Switzerland
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So, no refund. I reorder the power supply.
GHXAMP Upgrade 500W Amplifier Switch Power Supply Dual DC 80V 24V 36V 48V 60V LLC Soft Switch Technology Replace Ring Cow 1PCS

I will test it again :-D
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Old 25th March 2019, 09:03 AM   #23
hansueli is offline hansueli  Switzerland
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So I receive the new power supply. Can someone say why there is some wires from high to low side under the transformer? Is the galvanic isolation true with that thing?
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Old 29th March 2019, 09:35 AM   #24
hansueli is offline hansueli  Switzerland
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I just testet the power supply. With 8ohm resistor. The power supply handle it very easy. It got warm but not much. My 100W resistors were overloaded and gets very very hot :-)

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Power supply draws about 623W max from the 230v socket. So the efficiency is about 90% No noise or somthing like that :-)

Last edited by hansueli; 29th March 2019 at 09:38 AM.
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Old 10th May 2019, 09:48 AM   #25
hansueli is offline hansueli  Switzerland
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So I just tested the supply with two IRAUDAMP7

Works great. At max volume I have 122W at the 230v socket. Speaker is Canton Karat 709.
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Old 13th May 2019, 11:36 AM   #26
hansueli is offline hansueli  Switzerland
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Here some pictures with 8ohm load per rail
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At 230V socket i have about 600W power consumption. Supply was a bit overloaded. After testing thermal shutdown was getting in.

Ripple looks good.
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Old 13th May 2019, 02:39 PM   #27
hansueli is offline hansueli  Switzerland
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Quote:
Originally Posted by hansueli View Post
Here some pictures with 8ohm load per rail
Click the image to open in full size.

At 230V socket i have about 600W power consumption. Supply was a bit overloaded. After testing thermal shutdown was getting in.

Ripple looks good.
I made some new mesurements with and without some additional capacitor.
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I looks better. I reseted my osczillospoce for that. Could it be true only 200mV noise?

It vould be nice. Voltage drops to 44.4V with 8ohm load.

Resistor gots too hot^^
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Old 13th May 2019, 03:58 PM   #28
hansueli is offline hansueli  Switzerland
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for information.


the used power supply is:
500W 48V LLC ALIEXPRESS
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Old 15th May 2019, 08:50 AM   #29
chermann is offline chermann  Austria
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Hi Hans

you wrote:
It vould be nice.
Voltage drops to 44.4V with 8ohm load.

so your setup without load was 48v exactly? - so a trop of 3,6v is not bad.

chris
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Old 15th May 2019, 09:02 AM   #30
hansueli is offline hansueli  Switzerland
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Chermann

The mesurement are only for the power supply. No amplifier output or same.


The 44.4V are false. I remesured with Fluke Voltmeter and voltage drops to -47.4V and +47.3V

Last edited by hansueli; 15th May 2019 at 09:11 AM.
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