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Test class d dwm drive board separately
Test class d dwm drive board separately
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Old 25th November 2020, 02:30 PM   #71
Achim1409 is offline Achim1409  Germany
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Ok, i have tried with the original FDA24N50F... They stay cold... I will continue now..Thanks a lot Mario and Perry
2Ch. DSO, Multimeter, Hot Air Station, Soldering Irons,
12V Server Supply, L-C-R Tester, Component tester
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Old 25th November 2020, 04:21 PM   #72
MarioRestucci is offline MarioRestucci  Italy
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Location: NAPOLI
Ok, install power diodes and the lowest you can battery voltage for the firts power up.
If i remember, gzpa10000spl HC allow the minimun battery voltage of 12v for the start-up then, it can go lower once it is turned on completely., under this point remain in protection.
Other amps (same design but lower power) accept 11 or 10.5v.
Dont forget, use only one fet per bank (fda24n50f or irfp460lc).

This allow you to perform the first start up to see the class D operation for 3seconds for each stage, so you can extend the test time to 10 seconds, 20 seconds, so, install other fets and use a speaker to try to listen 10 second of music.....
If all ok, install all, install the board in the chassis and clamp all to the heatsink.
Now you can try to power the amp at full battery voltage (14,5v) and good current reserve.
If the amp survive at this.......you can use in the car...
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