Summary of Teardown of a Peaktech 6225A
The Peaktech 6225A power supply offers high resolution and low noise at a competitive price. Testing confirms precision begins around 1% of full scale for both voltage (above 0.2V) and current (above 50mA). Idle power consumption is 4.2W, rising to 5.2W at 25V output. Under stress at 30V and 5A, the fan activates quickly. Mains startup reveals a voltage glitch that varies with load resistance but extinguishes over time due to filter capacitors.
Parts used in the Peaktech 6225A Test:
- Peaktech 6225A power supply
- Calibrated multimeter
- PSU burner
- 10R resistor
Intro
I got a Peaktech 6225A power supply to power some things, as it seemed like a good deal, going beyond what one might find normally in these types of supplies: more display resolution and supposedly, lower noise. For this price, this supply is a good deal compared to other similar ones on the market. Let’s see how it performs.
You can even grab one on Amazon.de or Amazon.fr through affiliate links which helps me support this website, while offering you the same low price.
Voltage and current set
For the first test, I have checked if the supply is really delivering on that 1mA / 10mV precision, using a calibrated multimeter. The results are below: for the voltage setting, the power supply seems to hold on pretty well from about 0.2V and higher, below which it is not that much control. On the current side, things are similar, current cannot be very accurately set below about 50mA. In both cases, the precision starts to be there from about 1% of the full scale and I think it is perfectly fine for this kind of product.
Burn test
First off, the power consumption test: the power supply burns 4.2W while on and with the output turned OFF. If the output is turned ON and set to 25V and no load, it consumes 5.2W, which I think is decent.
Of course, I had to grab my PSU burner to start stressing this guy out. I set the supply for 30V and 5A load and let it run for half an hour. The fan quickly started.
Mains power ON test
I checked what happens when the power supply is switched ON, from the mains switch at the back. With no load, there is a small 0.5V glitch that takes time to die down, due to the high filter capacitors. With a 10R resistor the glitch is surprisingly higher at 1V, but it extinguishes faster. Note: voltage is orange channel and current is blue channel.
Read more: Teardown of a Peaktech 6225A
- How precise is the voltage setting on the Peaktech 6225A?
The supply holds precision well from about 0.2V and higher, though control is limited below this threshold. - Can I accurately set the current below 50mA?
No, current cannot be very accurately set below about 50mA; precision starts from about 1% of the full scale. - What is the power consumption when the unit is on but the output is off?
The power supply burns 4.2W while on with the output turned OFF. - Does the fan activate during high-load testing?
Yes, the fan quickly started when the supply was set for 30V and a 5A load. - What causes the small glitch when switching the mains power ON?
The glitch is caused by high filter capacitors and takes time to die down. - How does adding a 10R resistor affect the startup glitch?
A 10R resistor makes the glitch surprisingly higher at 1V, but it extinguishes faster. - Is the Peaktech 6225A considered a good deal compared to similar supplies?
Yes, it is considered a good deal due to its display resolution and lower noise features.
