Hey all,
I've got a PHD5 Earthquake that suffered partial output failure. Amp is using HIP4080AIP and TLC271 in the output section. I replaced all output fets P50NE1 with IRF3710 (16). I also replaced the HIP4080 with a HIP4081 which I had available. The amp powers on and ONLY draws 0.25A and with green power LED, produced rail voltage of 80v. I briefly see ~10vDC on both speaker terminals then it goes down to 0v. Regulated voltage seems to be 5 to +13vDC on the opamps.
The HIP4081 is different than the HIP4080. When I put the original HIP4080AIP back in, the amp seems to work OK. Idles at 1A and passes audio.
HIP4080AIP includes a comparator that I guess this amp is needing to use.
I dont have any new HIP4080.
How can I be assured the original HIP4080 will work reliably, or should I wait and order new HIP080? These are very high rate failure components... but the original is some odd 20 years old and seems to be working. Apparently Newark is getting new stock of HIP4080AIP by 8/17/22 but then chatting with Newark online support they're saying 375 days. Farnell in the UK appears to have stock but I cant seem to have them shipped to the USA.
I've got a PHD5 Earthquake that suffered partial output failure. Amp is using HIP4080AIP and TLC271 in the output section. I replaced all output fets P50NE1 with IRF3710 (16). I also replaced the HIP4080 with a HIP4081 which I had available. The amp powers on and ONLY draws 0.25A and with green power LED, produced rail voltage of 80v. I briefly see ~10vDC on both speaker terminals then it goes down to 0v. Regulated voltage seems to be 5 to +13vDC on the opamps.
The HIP4081 is different than the HIP4080. When I put the original HIP4080AIP back in, the amp seems to work OK. Idles at 1A and passes audio.
HIP4080AIP includes a comparator that I guess this amp is needing to use.
I dont have any new HIP4080.
How can I be assured the original HIP4080 will work reliably, or should I wait and order new HIP080? These are very high rate failure components... but the original is some odd 20 years old and seems to be working. Apparently Newark is getting new stock of HIP4080AIP by 8/17/22 but then chatting with Newark online support they're saying 375 days. Farnell in the UK appears to have stock but I cant seem to have them shipped to the USA.
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Did the 3701s have the Z suffix?
Is there a rush to get it out? If not, I'd wait.
If the new 4080 wasn't available, if it wasn't running really hot and was producing good drive signals, it would probably be OK.
Keep the original 4080. There is sometimes a problem with the non-Z 3710s and the newer 4080s.
Is there a rush to get it out? If not, I'd wait.
If the new 4080 wasn't available, if it wasn't running really hot and was producing good drive signals, it would probably be OK.
Keep the original 4080. There is sometimes a problem with the non-Z 3710s and the newer 4080s.
If the amp does strange things with the new 4080, using the old 4080 may be the best option. Test thoroughly.