New Siglent SPD4000X series power supply

[tautech]

Prices are up on the NA site although this page doesn't seem to show up from their front page yet.    https://siglentna.com/products/dc-power-supply/spd4000x-series/

SPD4323x is $680, SPD4121 is $780 and SPD4306X is $950.

Welcome to the forum.

Pricing is correct and official release is just a few days away.

[thm_w]

SPD4121X would have been great but not sure I understand the choice of a 12V maximum output (12V 10A x2, 15V 1.5A x2).
Usually for automotive/battery simulation you'd want around 13 or 14V.
Even for testing a 12V product, you'd sometimes want to try +/-10%.

This is why ~6.3V is somewhat standard (for use with 5V designs).

[exe]

This is why ~6.3V is somewhat standard (for use with 5V designs).

Ha-ha, I thought it's for vacuum tubes.

[KungFuJosh]

SPD4121X would have been great but not sure I understand the choice of a 12V maximum output (12V 10A x2, 15V 1.5A x2).

I don't know why they chose those specific specs, but each of the 3 models appears to be geared towards different V/A requirements. The SPD4323X would be the only version I would consider, and that has nothing to do with it being the cheapest...which doesn't hurt either.

ETA: Okay, price did matter. I just looked again at the SPD4306X, and those specs would work too, but not for the price.

[KungFuJosh]

Hmmm, this is interesting...

SPD4306X:
Weight   26.46 lbs
Dimensions   8.7 × 14.17 × 5.24 in

SPD4121X:
Weight   26.46 lbs
Dimensions   8.7 × 14.17 × 5.24 in

SPD4323X:
Weight   17.64 lbs
Dimensions   8.7 × 11.8 × 5.24 in

Seems like 2 of those might be the same hardware. I wonder what that might inspire. 🥸

[thm_w]

This is why ~6.3V is somewhat standard (for use with 5V designs).

Ha-ha, I thought it's for vacuum tubes.

For me if designing a lab PSU for use with valves (or 6V batteries) you'd probably choose ~8V.
You can look around at whats commonly available for lab PSUs: 60V, 50V, 30V, 27V, 15V, 6V, etc. Which makes sense for use on 48V, 24V, 12V, and 5V systems. 10-20% headroom.

12V - 10% gives you 10-11V, which no one uses as a standard voltage.

Hmmm, this is interesting...

SPD4306X: Weight   26.46 lbs - 15V 1.5A, 1A, 30V 6A x2
SPD4121X: Weight   26.46 lbs - 15V 1.5A x2, 12V 10A x2
SPD4323X: Weight   17.64 lbs - 6V 3.2A x2, 32V 3.2A x2

Seems like 2 of those might be the same hardware. I wonder what that might inspire. 🥸

I added the voltage specs above. Its a completely different transformer winding I would think.

[KungFuJosh]

Its a completely different transformer winding I would think.

That's certainly one possibility, but it's not the only possibility. Let's speculate! 😉

[tautech]

Released today June 28 2024.

https://int.siglent.com/products-overview/spd4000x/
https://siglentna.com/power-supplies/spd4000x-series-programmable-linear-dc-power-supply/
https://www.siglenteu.com/power-supplies/spd4000x-series-programmable-linear-dc-power-supply/

Datasheet attached.

[hpw]

Is there any SPS4000X_Service_manual seen/given yet? As the SPS5000X_Service_manual even exists already.

While the Ch1/Ch4 meter alters IMHO a bit to much as cold to warm up .. and how user calibration values alters the meters.

Hp

[tautech]

Is there any SPS4000X_Service_manual seen/given yet?

Not yet.

As the SPS5000X_Service_manual even exists already.

It's been released for 3 years.
https://www.eevblog.com/forum/testgear/siglent-sps5000x-psus-coming/

While the Ch1/Ch4 meter alters IMHO a bit to much as cold to warm up .. and how user calibration values alters the meters.

Which product ?

[Kawakneurder]

Looks like quite an interesting supply, the 4323X and 4306X especially.
Noise and load regulation are exceptional for the high current output (compared to similarly priced PSUs).

I am wondering about transient behavior (ex. time to switch from CV to CC mode, and residual energy in the output if it suddenly switches to CC mode).
@Tautech Do you have any idea how large the output capacitance is? Or do we have to wait for a teardown from Dave

[pdenisowski]

hm, keypad and 1 rotary encoder... So you want to adjust the output voltage on CH1. You turn the encoder and ooops, magic smoke. You just adjusted CH2.

Many lab power supplies have the ability to set overvoltage and overcurrent thresholds on a per channel basis - if you try to exceed the limit, the channel is disabled.  This has kept me from blowing up all kinds of things over the years

[pdenisowski]

Perhaps you are right but maybe if the people would carelessly use leads with bare metal showing in HV situations it may be advantageous in the long run to allow them to win their award. 

Does this count? It's only 40 amps at 20 volts ...

(Please don't try this at home)

[jjoonathan]

HC is a lot of fun, you get to throw sparks, melt things, and it isn't trying to jump through the air to kill you. Just don't forget your safety rag and fire extinguisher!

https://youtu.be/uXEPy6Za6cI?t=218

(Since it has been a decade since photonicinduction's heyday, I should probably explain the bit: the fire extinguisher was a spray bottle with water for the many times he caught the carpet on fire.)

[hpw]

I am wondering about transient behavior (ex. time to switch from CV to CC mode, and residual energy in the output if it suddenly switches to CC mode).
@Tautech Do you have any idea how large the output capacitance is? Or do we have to wait for a teardown from Dave

To change from any modes, the related output's have to be switched OFF & On again .... the given cable is rated as 3A with twisting "bunch plug". Those twisting "Bunch Plug" are a culprit of no contacts/loosing contacts.

In the custom calibration mode as for first use, all channel 's values V & I, needs to be carefully set !! Otherwise 

[mon]

AppVision now has listings up for AUD pricing:
SPD4323X $1,122.00
SPD4121X $1,287.00
SPD4306X $1,595.00

Pretty comparable to the US pricing.

Now I need to calm my itchy trigger finger and wait for Dave to take one apart... Would hate there to be a repeat of the SPD3000x's early unit issues.

[hpw]

Now I need to calm my itchy trigger finger and wait for Dave to take one apart... Would hate there to be a repeat of the SPD3000x's early unit issues.

To note:
- if you power C2 or C3 as 10V and switch on without any load, the current setting should have any value > 0.000A, otherwise no output voltage seen... setting like 0.010A shows than 10V at the meters otherwise nada.

- nice would be a simple factory copy to the user calibration table, so simple to calibrate and reset user calibration to valid state.

IMHO, to test the gear really, any dynamic test (comprehensive test) would be required using a good electronic load gear.

[tautech]

Now I need to calm my itchy trigger finger and wait for Dave to take one apart... Would hate there to be a repeat of the SPD3000x's early unit issues.

To note:
- if you power C2 or C3 as 10V and switch on without any load, the current setting should have any value > 0.000A, otherwise no output voltage seen...

Normal.

As this can bluff some ppl we always dispatch with 1V 1A settings on all channels.

[slavoy]

No info about the measurements refresh rate in the sheets   

[tautech]

No info about the measurements refresh rate in the sheets   

List time accuracy < 50 ms might be related. 

[pdenisowski]

IMHO, to test the gear really, any dynamic test (comprehensive test) would be required using a good electronic load gear.

Yes, almost all "proper" power supply testing should be done using a high-quality electronic load.

[2N3055]

No info about the measurements refresh rate in the sheets   

Could you point me to any modern PSU by likes of Keysight and R&S that specifies that parameter?
I checked 5-6 of them and not a mention...

[pdenisowski]

No info about the measurements refresh rate in the sheets   

Could you point me to any modern PSU by likes of Keysight and R&S that specifies that parameter?
I checked 5-6 of them and not a mention...

Could I ask what you mean by "measurement refresh rate"?  If it's how fast readback data can be logged, that definitely is in our spec sheet. We also specify the sampling time used for statistical measurements.

https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/NGU_dat_en_3608-6802-32_v0201.pdf

I also did an entire "technology" video explaining power supply readback and logging



and one specifically on how this is done on our NGM power supply (normal and "fast" logging)

[2N3055]

With do all respect, NGU is NOT a standard lab PSU, but an fancy/expensive SMU.
It is a source/measure unit and measuring is part of primary function of the instrument.

I checked for several Keysight and R&S standard PSU units and there is not even a single mention of how fast internal V/A meters sample values..
Or how fast is request, measure, reply cycle time for SCPI readout, on various interfaces.

[pdenisowski]

With do all respect, NGU is NOT a standard lab PSU, but an fancy/expensive SMU.

Point well taken - I just happened to have the NGU datasheet open because I was answering a question about it in another thread.  That was careless of me and I apologize for not choosing a comparable supply

I'm assuming "measurement refresh rate" refers to how fast readback data values can be logged -- there is a human-perception limit with regards to how fast they can be viewed on a power supply display.  If this definition is correct (and it may not be), then "measurement refresh rate" would have to refer to supplies that can log readback values -- I'm not sure that a "readback display update rate" value would be helpful or relevant.

It appears that the new Siglent power supply does not support logging, so I'm not surprised that no value for "measurement refresh rate" was given.  (And that's not a slam on Siglent - our comparable HMP4000 series supply also does not support logging).

Many R&S basic / entry level power supplies do however support logging, and when they do, this is specified.  It's not just the "fancy/expensive" ones

https://www.rohde-schwarz.com/us/products/test-and-measurement/dc-power-supplies/rs-ngc100-power-supply-series_334248.html

Again, my apologies for not using a better example in my original post.  Thanks for keeping me honest!