Purchased a D36V28F12 for a quick test and it seemed fine.
Have now purchased 10 for a project and find that it does not work well.
Here is the key data:
VIN 48V DC
OUT 12V at no load
Our 11,6V at load
Temperature of component 70°C
Shuts down after 20-30 seconds
With air cooling via fan 40°C and shutdown a little later
Power supply for VIN Meanwell IRM-90-48
Fan 0.09 amps
LED strip 0.97 amps
Relay 0.64 amps with blocking diode
Relay 0.54 amps with blocking diode
Ambient temperature 21 °C
The maximum continuous load is therefore 2.24 amps.
The 0.54 amp relay is only switched on for 50 seconds every 60 minutes to replenish the water.
The ambient temperature can rise to 35°C, depending on where the end customer uses the product.
The real continuous load 24/7 is 1.7 amps.
The leads are all soldered.
The module switches off after approx. 30 seconds.
The module did not tolerate 4 resets / restarts and is now defective.
I have also tried the D36V50F12 variant with basically the same result. The only difference is that the shutdown happens much later.
According to the description, the controller should be safe because it has overcurrent protection and short-circuit protection, a thermal shutdown function and a soft-start function that limits the inrush current and increases the output voltage at start-up and gradually raises it.
Do you have any help/explanation on this?