Hi all,
I have a hip4080 amp in over current status.
No shorted mosfets.
tested a known working HIP4080 IC and issue persists.
Pic below of hip4080 area
dc voltage present on both positive and negative speaker terminals
Outputs - P60NF06 (used 65N06 for testing)
PSU - IRFZ44
I have a hip4080 amp in over current status.
No shorted mosfets.
tested a known working HIP4080 IC and issue persists.
Pic below of hip4080 area
dc voltage present on both positive and negative speaker terminals
Outputs - P60NF06 (used 65N06 for testing)
PSU - IRFZ44
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Are those the original output transistors?
Does it go into over-current protect without the output transistors?
Does it go into over-current protect without the output transistors?
Hi Perry,
originals were P60NF06. (amp was previously repaired by someone else)
No, it does not go into over current protect with no outputs fitted.
originals were P60NF06. (amp was previously repaired by someone else)
No, it does not go into over current protect with no outputs fitted.
4080 amps can be very finicky. Unless you know 100% for sure that those work in 4080 amps, they could be the problem.
Did you confirm that all drive signals at the FETs are good?
Did you confirm that all drive signals at the FETs are good?
Ok noted.
will confirm when I get my scope working. using the DSO150, i did see some drive signals
will confirm when I get my scope working. using the DSO150, i did see some drive signals
What signals do you have on the 4080 pins 5, 6 and 7?
Which pin of which op-amp is driving pin 7 of the 4080?
Which pin of which op-amp is driving pin 7 of the 4080?
In the 90s I designed some medium power (10~20W) class-D-amps with HIP4081. They were the most unreliable amps I ever had, failing sporadically. At the end I ditched them all and gave up designing class D - until Texas Instruments came onto this scene.
J112 removed ; pin 1&2 bridged on 5470
Pin 5 - 0v
pin 6 - triangle waveform referenced to 5.2v
pin 7 - 10v
applied audio signal, cannot find it on the 5470.
Pin 5 - 0v
pin 6 - triangle waveform referenced to 5.2v
pin 7 - 10v
applied audio signal, cannot find it on the 5470.
With pins 1 and 2 shorted, the voltage on pin 1 should match pin 3.
Do you have the proper supply voltage on pins 11 and 4?
What diagram are you using for this?
Do you have the proper supply voltage on pins 11 and 4?
What diagram are you using for this?