$10 48 Volts 10 Amperes Power Supply from Aliexpress.
The power supply is rated at 48 Volts 10 A.
The output Voltage is adjustable from 44 Volts to 64 Volts.
For a power supply that can be adjusted from 44V to 64V that can do continuous 8A, although it was not able to do its 10A current rating, for the asking price it is not too bad, especially if you can grab it for $10 during a sale, promotion.
Check this Power Supply powering the Wondom TPA3255 2x300W Power Amplifier here • Testing the Wondom TPA...
Output Voltage Set to 50 Volts:
Idle Power Draw - 7.8 Watts
Power Draw by the Electronic Load - 400 Watts
Power Draw from the AC Source - 455 Watts
Efficiency - 88%
Output Voltage Set to 64 Volts:
Idle Power Draw - 10 Watts
Current pulled by the load - 8A
Power Draw by the Electronic Load - 514 Watts
Power Draw from the AC Source - 576 Watts
Efficiency - 89%
Ripple 8A Load - min. 1Vpp
Voltage Regulation @ 8A Load - Very Good Better than 1%
Power Supply Over Current Protection is set to about 8.5A.
Fan is always on.
The power supply has the minimum mains input filtering on.
Primary bridge rectifier GBU810 - Datasheet says this can do 8A @ 100℃.
Primary swithcer 2 x 2sc2625 - Datasheet says this can do 10A.
Secondary Rectifier Diode N-D92-02 - Datasheet says this is rated at 2 x 10A (20A total)
If the specs of these parts is to be believe it will be able to deliver 8A continuous at 220-240 volts input primary voltage even if the parts are derated at 40% but as always it is different with actual test , unfortunately my place is not suitable to test and run parts like this for extended period and just do not have the funds to run the test for days due to electricity cost.
Semiconductors do not like heat and most of these cheap power supplies are rated at 25°C ambient room temperature unless it specifically states otherwise..
Running the power supply at higher ambient room temp of 30 °C+ and the psu is also inside and enclosure is gonna get the temperature of the psu really high and this could shorten the life of the psu if it is also run at full rating.
Негізгі бет Worth a buy? The $10 44 Volts to 64 Volts 10A Power Supply from Aliexpress
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