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Lab Power Supply Turn ON and OFF Characteristics

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Aldo22:

--- Quote from: mawyatt on October 06, 2024, 05:13:50 pm ---So ~160mA with 40mA Current Limit for 3 seconds :P

--- End quote ---

Yes. The DMM shows a Max of 174mA.

It's all about the measurement. There was no question that this PSU is bad in this respect.

That's why I asked today whether the DPS-150 is better.

mawyatt:
Here's some measurements with 50Ω and Voltage set to 8V and Current Limit set to 40mA.

#64 Siglent CH1 3303X @ 50ms/div
#65 Siglent CH1 3303X @ 100us/div
#66 Siglent CH2 3303X @ 50ms/div
#67 Siglent CH2 3303X @ 100us/div

#68 Instek CH1 GPP4323 @ 50ms/div
#69 Instek CH2 GPP4323 @ 50ms/div

#73 Korad KWR102 @ 50ms/div

#74 Korad KWR103 @ 50ms/div

BTW the Korad KWR102 is a SMPS with 30V/30A capability, and KWR103 is SMPS with 60V/15A capability.

Best

mawyatt:
Here's the Turn OFF characteristics, all 50ms/div.

#75 Siglent 3303X CH1

#76 Instek GPP 4323 CH1

#77 Korad 102

#78 Korad 103

Best

Furna:
50Ω wire wound resistor; Voltage set to 8V and Current Limit set to 40mA.

#31 Korad KA3005P @50ms/div PowerON
#32 Korad KA3005P @50ms/div PoserOFF

No "overshoot" but voltage stay at 2.09V => 0.0418A (multimeter confirms) while PSU display shows 2.07V and 0.039A.
Anyway for the price seems tollerable to me.
@mawyatt could you add measurments to your caputure? Are the KWR102/KWR103 also "lying"?

Why I insist on specifing wire wound? Because I am putting the PSU in the worst scenario.

mawyatt:

--- Quote from: Furna on October 06, 2024, 06:15:40 pm ---@mawyatt could you add measurments to your caputure? Are the KWR102/KWR103 also "lying"?

--- End quote ---

KWR102 reads 0.039A when set to 0.040A and KS34465A DMM reads 42.042mA, KWR 103 reads 0.039A when set to 0.040A and DMM reads 42.03mA.

Best

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