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EEVblog #828 - Siglent SPD3303X precision Lab PSU Teardown

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EEVblog:
Inside the Siglent SPD3303X Precision Programmable DC Lab Power Supply.
http://amzn.to/1m9Knp2
UPDATE: There is an even cheaper version, the SPD3303X-E which has 10mV/10mA resolution.
http://amzn.to/1jNsQRL


brutester:
At around 13:20 I would say that those diodes are for system supply for CPU, DAC, etc, not 3rd output

EEVblog:

--- Quote from: brutester on December 09, 2015, 09:54:17 am ---At around 13:20 I would say that those diodes are for system supply for CPU, DAC, etc, not 3rd output

--- End quote ---

Nope, keep watching, the CPU etc has it's own bridge and big filter caps on the front panel board. The bridge gets damn hot too.

Opticalworm:
Good news Dave, linux is probably not an option for this supply. The STM32F207VE is a cortext M3 with around 512KB of memory.

My money is on an RTOS.  :)

-Ron

rs20:
26:30 -- If you have the output physically shorted, the voltage you choose is irrelevant. It's in constant current mode. So there's no point in settings it to 1V or whatever to make it maximally stressful, you've already achieved that with the shorted outputs.
29:30 -- Is this oscillation caused by the dummy load, or by the PSU (or by the combined feedback loop)? Put another way, would we see this same oscillation with a real, physical 50W 1 ohm resistor? I'm happy to buy you the resistor if you're willing to test it  :)

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