Recent content by Sid55

It is pulling in the standard 12V DC from my old computer ATX PSU. The boost converter boosted 12V DC to (maximum) 67.5V on the output.

It's a boost converter and it's certainly not a boost-buck converter.

Non-isolated boost converter Input Voltage: DC8.5V to 50V Output Voltage: DC10V to 60V Max. Ouput Current: 12A Frequency: 150KHz

I agree. They seem to output 4 - 4.2 Watts for an extended operation with acceptable levels of heat generated on LED mounting boards. They can be pushed past 6 Watts and those mounting boards heat up to high levels within minutes, but I saw no pointing in doing that. Would you care to explain...

Wow! 24 Watts of dummy load right there. It would be super nice if I could get a light bulb of similar load that also emits same color temperature or something close to 6000K. I see some opportunity of using all these lights for photography and video work indoors in future. 5000K - 6000K light...

Those LED COBs have none. This could be the reason why my second setup generated a lot more heat while the first set up barely did. My previous setup had very long wires connecting to those LEDs but I cut 2/3 of their initial lengths for the second set up. I did not measure connecting wires...

It pretty much did the job. I have no idea how much load to put on this 12V 34A rail. Hoping that load of LEDs would bring it into regulation if I draw power to light up 10 X 5 Watt LEDs all at once as I have noticed people putting 50Watt dummy load to bring PSU into regulation.

Would have loved to do the battery pack set up as LED COBs were amazingly bright but without any current limiter my batteries were not ideal. They were pushing several times more current than rated current of LED COBs.

Some new results after this modified set up Set 1 * 2 X 5 Watt LED COB lights (rated at 9 - 11V @ 400mA each) wired in parallel * DC-DC 7-35V to 1.25-30V buck converter CC CV * DC power source: 12V from ATX 24 pin connector of PSU Set 2 * 2 X 5 Watt LED COB lights (rated at 9 - 11V @ 400mA...

Yes. constant current & constant voltage

*correction* It's 500 Watt max not 480 Watt max I incorrectly stated in my first post. You are most likely correct here. Dialing back to 800mA gave me 9.7 volts max (pic below). It never went over 8.5 volts at 900mA plus.

Its current limiter and voltage adjustment functions seem to work fairly well within buck converter's specifications and as expected voltage dropped at higher current output.

Thanks to anyone who likes to chime in and help out this newbie. :smile: I bought some CC CV buck converters to power my DIY LED panel project using a perfectly working PC power supply unit that was collecting dust inside a fairly old and unused PC but unfortunately the buck converter does not...

Lives of buck converters, boost converters, and buck-boost converters would be so empty without inductors.

I highly doubt the schematic would be drastically different from other e-cig chipset makers however components used more than likely would be.