Author Topic: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.  (Read 10281 times)

0 Members and 1 Guest are viewing this topic.

Offline nctnico

  • Super Contributor
  • ***
  • Posts: 28429
  • Country: nl
    • NCT Developments
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #25 on: October 18, 2021, 10:47:15 am »
Using a supply that misbehaves when entering or leaving CC is also a recipe for disaster, as is voltage overshoot on startup or shut down. The only supply I'll comment on is the ones we selected for the critical use in the on-going development project, which is the Siglent SDP3303X-E. These have been tested, augmented to 3303X and calibrated and behave well.
Great you like your Siglent PSU but don't think the GW Instek is anything less. Siglent probably learned everything there is to know about PSU design from GW Instek. They (Siglent and GW Instek) released at least one PSU which is 100% identical and GW Instek has been in test equipment business (first specialising in power supplies) a lot longer compared to Siglent.
« Last Edit: October 18, 2021, 01:55:45 pm by nctnico »
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline Jan Audio

  • Frequent Contributor
  • **
  • Posts: 820
  • Country: nl
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #26 on: October 18, 2021, 03:44:10 pm »
Siglent SDP3303X-E says you dont have short circuits on your 5v ( digital section ) anytime.
Bad design, same with the Rigol.

Edit : me happy GW fanboy.
Just reading this topic : https://www.eevblog.com/forum/testgear/rigol-dp832-random-reboots/
« Last Edit: October 18, 2021, 03:46:03 pm by Jan Audio »
 

Offline mawyatt

  • Super Contributor
  • ***
  • Posts: 4117
  • Country: us
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #27 on: October 18, 2021, 04:11:33 pm »
Using a supply that misbehaves when entering or leaving CC is also a recipe for disaster, as is voltage overshoot on startup or shut down. The only supply I'll comment on is the ones we selected for the critical use in the on-going development project, which is the Siglent SDP3303X-E. These have been tested, augmented to 3303X and calibrated and behave well.
Great you like your Siglent PSU but don't think the GW Instek is anything less. Siglent probably learned everything there is to know about PSU design from GW Instek. They (Siglent and GW Instek) released at least one PSU which is 100% identical and GW Instek has been in test equipment business (first specialising in power supplies) a lot longer compared to Siglent.

Earlier stated "Haven't used any of the GPP stuff you and others have, but from what you've posted and others this seems like superb equipment", the GPP was referring to GW Instek Power Supplies :-+

Best,
Curiosity killed the cat, also depleted my wallet!
~Wyatt Labs by Mike~
 

Offline Jan Audio

  • Frequent Contributor
  • **
  • Posts: 820
  • Country: nl
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #28 on: October 18, 2021, 04:24:18 pm »
You can still buy them.
If china invades taiwan first thing they do is downgrade the GPP4323 to fixed amperes on the extra channels.
 

Offline mawyatt

  • Super Contributor
  • ***
  • Posts: 4117
  • Country: us
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #29 on: October 18, 2021, 04:27:34 pm »
Siglent SDP3303X-E says you dont have short circuits on your 5v ( digital section ) anytime.
Bad design, same with the Rigol.

Edit : me happy GW fanboy.
Just reading this topic : https://www.eevblog.com/forum/testgear/rigol-dp832-random-reboots/

Yes aware and we don't use the 5v section for any critical work, always for critical use the two variable voltage and current limit sections. We have 3 SDP3303X-E and they are good down to low voltage and currents as mentioned on those 2 outputs. One unfortunately isn't usable because of the current limit offset mentioned caused by my improper calibration, which makes for a risk for critical use and not acceptable to us.

GW seems like a good alternative, we'll definitely be looking at those for any future power supply needs.

BTW not a bad design by Siglent, they chose a simple linear regulator to keep within a cost budget....likely why the GW costs more ;)

Best,
Curiosity killed the cat, also depleted my wallet!
~Wyatt Labs by Mike~
 

Offline Jan Audio

  • Frequent Contributor
  • **
  • Posts: 820
  • Country: nl
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #30 on: October 18, 2021, 04:31:21 pm »
Well it cost not to much, R&Spricing are off the charts.
Not much choise left.
 

Offline mawyatt

  • Super Contributor
  • ***
  • Posts: 4117
  • Country: us
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #31 on: October 18, 2021, 04:32:17 pm »
You can still buy them.
If china invades taiwan first thing they do is downgrade the GPP4323 to fixed amperes on the extra channels.

Nope, first thing they'll do is claim TSMC as a Chinese "asset" and "claim" China invented all the sub-micron semiconductor technology :o

Best,
Curiosity killed the cat, also depleted my wallet!
~Wyatt Labs by Mike~
 

Offline mawyatt

  • Super Contributor
  • ***
  • Posts: 4117
  • Country: us
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #32 on: October 18, 2021, 04:35:37 pm »
Well it cost not to much, R&Spricing are off the charts.
Not much choise left.

GW price is reasonable.

Like R&S, Keysight is very expensive too :-\

Best,
Curiosity killed the cat, also depleted my wallet!
~Wyatt Labs by Mike~
 

Offline Jan Audio

  • Frequent Contributor
  • **
  • Posts: 820
  • Country: nl
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #33 on: October 18, 2021, 04:36:28 pm »
By the way 2 of that other brand are more expensive then.
 

Offline DeadlyErnest

  • Newbie
  • Posts: 1
  • Country: au
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #34 on: May 31, 2023, 01:09:29 am »
Siglent SDP3303X-E says you dont have short circuits on your 5v ( digital section ) anytime.
Bad design, same with the Rigol.

Edit : me happy GW fanboy.
Just reading this topic : https://www.eevblog.com/forum/testgear/rigol-dp832-random-reboots/

Yes aware and we don't use the 5v section for any critical work, always for critical use the two variable voltage and current limit sections. We have 3 SDP3303X-E and they are good down to low voltage and currents as mentioned on those 2 outputs. One unfortunately isn't usable because of the current limit offset mentioned caused by my improper calibration, which makes for a risk for critical use and not acceptable to us.

GW seems like a good alternative, we'll definitely be looking at those for any future power supply needs.

BTW not a bad design by Siglent, they chose a simple linear regulator to keep within a cost budget....likely why the GW costs more ;)

Best,

Siglent 3303C has current limiting on 3rd 5/3.3/2.5 volt output.
 

Offline nctnico

  • Super Contributor
  • ***
  • Posts: 28429
  • Country: nl
    • NCT Developments
Re: Just bought a GW-Instek GPP-4323 power supply-First impressions etc.
« Reply #35 on: May 31, 2023, 03:35:01 pm »
Siglent SDP3303X-E says you dont have short circuits on your 5v ( digital section ) anytime.
Bad design, same with the Rigol.

Edit : me happy GW fanboy.
Just reading this topic : https://www.eevblog.com/forum/testgear/rigol-dp832-random-reboots/

Yes aware and we don't use the 5v section for any critical work, always for critical use the two variable voltage and current limit sections. We have 3 SDP3303X-E and they are good down to low voltage and currents as mentioned on those 2 outputs. One unfortunately isn't usable because of the current limit offset mentioned caused by my improper calibration, which makes for a risk for critical use and not acceptable to us.

GW seems like a good alternative, we'll definitely be looking at those for any future power supply needs.

BTW not a bad design by Siglent, they chose a simple linear regulator to keep within a cost budget....likely why the GW costs more ;)

Best,

Siglent 3303C has current limiting on 3rd 5/3.3/2.5 volt output.
But not adjustable! And that is precisely the point... Without adjustable current limiting, the extra output is a gimmick with very little practical use.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf