Regular Member
Joined: 17/04/2024
Location: AustraliaPosts: 75
| Posted: 09:54am 18 May 2025 |
Yep the PWM does seem a bit low but it'll be spending a lot of time over 5kW so will leave it for now and see how it behaves under load.
I used a different technique soldering the fets on the second board:
The drains and sources were soldered from the component side using the unregulated 80W iron. The fets were pushed up against the heatsink to keep them cool, and the iron was held on the leads for 8 to 10 seconds, getting both sides of the board hot enough for the solder to melt all the way through:
I'm pretty happy with the result, will do the same to the first board when I swap the gate resistors.