Hi All,
I blew one of my IRL2910 (TO-220AB) output devices (Q115-Q118) in my R channel main amp and unfortunately these are no longer available.
Can I get help with deciding which of these substitutes to select?
IRL540N and possibly STP40N10L were recommended substitutes in another post from 10 years ago. Perhaps betters substitutes are available? And more recently IRLB4030PBF works according to this post.
It seems IRL540N would be the best option, but Rds On is higher. Will this cause more heat? Is there any reason to select another one? Another possibility is IPP12CN10LG.
I am confident Vgs Threshold given in the data sheet should fall between 1-3 volts. On my working L amp ( running IRL2910s) I managed to observe the following: The output devices seem to be paired and Vgs is the same for each pair. Across all 4 devices I’ve measured a range of 0.6 Volts to 2 Volts. Vgs increases on one pair while turning VR2 CW. Apparently the range in VR2 satisfies the Vgs Threshold for all devices.
Schematics attached( page 10 of 24 shows the Main amp section). VPWRR is around +/-58 Volts. Links to data sheets below. Thank you.
IRL540N
STP40N10L
IRLB4030PBF
IPP12CN10LGXKSA1
I blew one of my IRL2910 (TO-220AB) output devices (Q115-Q118) in my R channel main amp and unfortunately these are no longer available.
Can I get help with deciding which of these substitutes to select?
IRL540N and possibly STP40N10L were recommended substitutes in another post from 10 years ago. Perhaps betters substitutes are available? And more recently IRLB4030PBF works according to this post.
It seems IRL540N would be the best option, but Rds On is higher. Will this cause more heat? Is there any reason to select another one? Another possibility is IPP12CN10LG.
I am confident Vgs Threshold given in the data sheet should fall between 1-3 volts. On my working L amp ( running IRL2910s) I managed to observe the following: The output devices seem to be paired and Vgs is the same for each pair. Across all 4 devices I’ve measured a range of 0.6 Volts to 2 Volts. Vgs increases on one pair while turning VR2 CW. Apparently the range in VR2 satisfies the Vgs Threshold for all devices.
Schematics attached( page 10 of 24 shows the Main amp section). VPWRR is around +/-58 Volts. Links to data sheets below. Thank you.
IRL540N
STP40N10L
IRLB4030PBF
IPP12CN10LGXKSA1
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I used HUF75842 with good results.
Also HUF75639 and HUF75339 seem similar.
Edit: Actually, I happen to have 4 pcs of IRL2910 in un-opened, original packaging, bought from Mouser.
Message me if you are interested. I don't need them.
Also HUF75639 and HUF75339 seem similar.
Edit: Actually, I happen to have 4 pcs of IRL2910 in un-opened, original packaging, bought from Mouser.
Message me if you are interested. I don't need them.
Thanks, I ordered IRL540N. How do you conclude IRLB4030 or IPP12CN10 are outside the SOA?
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