Products > Test Equipment
New Siglent SPD4000X series power supply
mawyatt:
Thanks Furna, interesting results!!
Think starting a new thread on Power Supply Turn ON and OFF characteristics might be in order to consolidate the various efforts of folks on this issue.
Best,
Furna:
Setup: SPD4121X
- Generic Blue LED (see IMG_20241006_151727.png)
- CH1 12V - 0.010A
- CH2 12V - 0.010A
Results:
- CH1 overshot to 3.48V => PSU shows 2.840V 0.0.10A in long run (see CH1-12V-10mA-BlueLED-10msec.png and CH1-12V-10mA-BlueLED-50msec.png)
- CH2 no overshot => PSU shows 2.840V 0.0.10A in long run (CH2-12V-10mA-BlueLED-10msec.png and CH2-12V-10mA-BlueLED-50msec.png and CH2-12V-10mA-BlueLED-500msec.png)
Awaiting comments
PS SPD4121X CH2 max voltage is 12V
For this reason I choose to use 12V for all tests with Blue LED
mawyatt:
Thanks Furna :-+
Interesting how the two channels differ in details!!
Edit: BTW we don't see this with the SPD3303X, see link below.
Note the thread started here.
https://www.eevblog.com/forum/testgear/lab-power-supply-turn-on-and-off-characteristics/
Best
MildInductor:
--- Quote from: Furna on October 06, 2024, 01:35:54 pm ---Setup: SPD4121X
- Generic Blue LED (see IMG_20241006_151727.png)
- CH1 12V - 0.010A
- CH2 12V - 0.010A
Results:
- CH1 overshot to 3.48V => PSU shows 2.840V 0.0.10A in long run (see CH1-12V-10mA-BlueLED-10msec.png and CH1-12V-10mA-BlueLED-50msec.png)
- CH2 no overshot => PSU shows 2.840V 0.0.10A in long run (CH2-12V-10mA-BlueLED-10msec.png and CH2-12V-10mA-BlueLED-50msec.png and CH2-12V-10mA-BlueLED-500msec.png)
Awaiting comments
PS SPD4121X CH2 max voltage is 12V
For this reason I choose to use 12V for all tests with Blue LED
--- End quote ---
Is this overshoot likely to damage any general IC circuitry? Say if I was supplying 3.3V to a general purpose IC that was only rated to operate up to 3.3V. Would the spill over be enough to damage it generally speaking?
Furna:
--- Quote from: MildInductor on October 07, 2024, 02:58:19 am ---
--- Quote from: Furna on October 06, 2024, 01:35:54 pm ---Setup: SPD4121X
- Generic Blue LED (see IMG_20241006_151727.png)
- CH1 12V - 0.010A
- CH2 12V - 0.010A
Results:
- CH1 overshot to 3.48V => PSU shows 2.840V 0.0.10A in long run (see CH1-12V-10mA-BlueLED-10msec.png and CH1-12V-10mA-BlueLED-50msec.png)
- CH2 no overshot => PSU shows 2.840V 0.0.10A in long run (CH2-12V-10mA-BlueLED-10msec.png and CH2-12V-10mA-BlueLED-50msec.png and CH2-12V-10mA-BlueLED-500msec.png)
Awaiting comments
PS SPD4121X CH2 max voltage is 12V
For this reason I choose to use 12V for all tests with Blue LED
--- End quote ---
Is this overshoot likely to damage any general IC circuitry? Say if I was supplying 3.3V to a general purpose IC that was only rated to operate up to 3.3V. Would the spill over be enough to damage it generally speaking?
--- End quote ---
It depends on the circuitry; some components are more tollerant than others.
Also it is not the voltage to damage a circuit; it's the current. And SPD4000X is not the worst in the class (note CH2 didn't overshoot).
Anyway here we are in a very corner case where we are testing different PSU (see https://www.eevblog.com/forum/testgear/lab-power-supply-turn-on-and-off-characteristics/) deliberating pushing a high voltage and limiting the current to check how fast the over current protection kicks in.
IMHO this is not a factor to keep in consideration while choosing a PSU; it's a fact to be aware while using the PSU.
As a general rule: you should be aware of what you are going to supply current to and how tollerant it is and set up your PSU accordingly.
Sure we are human and here the over current protection ... but if you are powering a super expensive prototype circuit you will double take any precaution.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version