EEVblog Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: RD Tech on July 31, 2017, 05:38:45 pm

Title: RD DPS5015 (50V/15A ) and DPS5020 (50v/20A) digital power supply rippple test
Post by: RD Tech on July 31, 2017, 05:38:45 pm
This is ripple test for DPS5015 . 

https://www.youtube.com/watch?v=QbcLtOT1IAQ&feature=youtu.be (https://www.youtube.com/watch?v=QbcLtOT1IAQ&feature=youtu.be)

Product page: https://www.aliexpress.com/item/RD-DPS5015-Constant-Voltage-current-Step-down-Programmable-digital-Power-Supply-buck-Voltage-converter-color-LCD/32702714880.html (https://www.aliexpress.com/item/RD-DPS5015-Constant-Voltage-current-Step-down-Programmable-digital-Power-Supply-buck-Voltage-converter-color-LCD/32702714880.html)
upper competer page: https://www.mediafire.com/folder/3iogirsx1s0vp/DPS_communication_upper_computer (https://www.mediafire.com/folder/3iogirsx1s0vp/DPS_communication_upper_computer)

The required instruments and requirements for test :
Oscilloscope ? Probe *1, IT6721 power supply 58V +, 20M bandwidth limitation.
Oscilloscope Vertical resolution 50mV , Controling DPS5015 by the upper computer.


we are *1 probe test , VPP is about 100mV,
we also use *10 proble to test , but *10 Probe can cause extra interference to make measurement VPP higher .

we also make ripple test for DPS5020. https://youtu.be/i62bFRMdgPw (https://youtu.be/i62bFRMdgPw)
DPS5020 page : https://www.aliexpress.com/store/product/RD-DPS5020-Constant-Voltage-current-Step-down-communication-digital-Power-Supply-buck-Voltage-converter-LCD-voltmeter/923042_32821185351.html?spm=2114.10010108.1000023.29.Up1mtg (https://www.aliexpress.com/store/product/RD-DPS5020-Constant-Voltage-current-Step-down-communication-digital-Power-Supply-buck-Voltage-converter-LCD-voltmeter/923042_32821185351.html?spm=2114.10010108.1000023.29.Up1mtg)
Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: floobydust on August 01, 2017, 02:56:39 am
That is pretty quiet  :)  No extra output filter needed. Nice.
I see 50mVpp no-load and 75mVpp at 3-10A, and 100mVpp at 15A, f=90kHz (I believe but not sure).

Ordered a DPS3005 (30V 5A) and look forward to trying it out.

The communication -C option with USB and Bluetooth boards looks very good. I should have ordered it.
It might be possible to make voltage waveforms, ramp,  pulse with the PC software?


Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: alm on August 01, 2017, 03:55:21 am
Your links do not work: the part after the ellipsis (...) is missing.
Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: floobydust on August 01, 2017, 03:59:35 am
Mods, suggest merging this thread with this one about the DPS5015:
https://www.eevblog.com/forum/testgear/testreview-of-power-supply-frontend-dps5015-50v15a/ (https://www.eevblog.com/forum/testgear/testreview-of-power-supply-frontend-dps5015-50v15a/)
Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: RD Tech on August 01, 2017, 05:23:10 pm
That is pretty quiet  :)  No extra output filter needed. Nice.
I see 50mVpp no-load and 75mVpp at 3-10A, and 100mVpp at 15A, f=90kHz (I believe but not sure).

Ordered a DPS3005 (30V 5A) and look forward to trying it out.

The communication -C option with USB and Bluetooth boards looks very good. I should have ordered it.
It might be possible to make voltage waveforms, ramp,  pulse with the PC software?
the result will be different for different test device.
did you buy communication version? if yes, you can show your test result
about the voltage wave , I don't know what you want to do. you can try
Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: RD Tech on August 01, 2017, 05:29:21 pm
sorry, it is some mistakes, I fixed it , you can check it again
Title: Re: RD DPS5015 digital power supply rippple test 50v15A
Post by: RD Tech on August 01, 2017, 05:31:09 pm
Mods, suggest merging this thread with this one about the DPS5015:
https://www.eevblog.com/forum/testgear/testreview-of-power-supply-frontend-dps5015-50v15a/ (https://www.eevblog.com/forum/testgear/testreview-of-power-supply-frontend-dps5015-50v15a/)
yes, this is our friends test too
because many friend need ripple test , but we don't have much time ,. so we only a video for riplle
it should be very clear