| Products > Test Equipment |
| DL24 Atorch type electronic loads: considerations on how to choose the best mosf |
| << < (3/6) > >> |
| Silicium81:
Here is the result of the RDS-on measurement on mosfet ok: 85.4 milli-ohm! The expected value being 40 milli-ohm, we are indeed in the presence of a fake IRLP260M... The test circuit used: (I made the simulation display the actual measured values) |
| elecdonia:
--- Quote from: Filippo52 on January 29, 2023, 07:51:57 pm ---I welcome you to share my thoughts on SOA and linear MOSFETs. Your idea of a resistor bank is very suggestive; but I fear that in the end it would be much more expensive than even the most expensive linear mosfet that solves all the problems with only one component --- End quote --- I agree with you. A less costly solution is to provide a modest selection of fixed high-power resistors to place in series with the MOSFET load tester. Example: Testing 48V power supply with 10A load current. 480W total dissipation. Place 4 ohm high-power resistor bank in series with MOSFET load tester. Connect + voltage sensing input of MOSFET load tester to high end of 4 ohm series resistor This permits load tester to measure total voltage drop for calculating Watts 40V across resistor = 400W 8V across MOSFET load tester = 80W 8V across MOSFET should be well within SOA |
| Filippo52:
okay but in this way you will have to prepare a type of resistor for each measurement situation, you will no longer have a flexible instrument that is valid in any load situation |
| Filippo52:
OK Silicium well done you are already a Mosfet expert. Now your hypothesis of replacing all the Mosfets with the same number of originals makes sense. Just try to find a reliable supplier. Hello and good job |
| Silicium81:
Hopefully they will be ok: |
| Navigation |
| Message Index |
| Next page |
| Previous page |