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460EX watchdog
#1
I note that the 460EX uses the same LBA716 Dual Single-Pole OptoMOS relay as the ACC24E3. Does it have a similar design problem with an improperly sized driver gate or the excessive current due to a undersized resistor? We have had some faults with this relay.
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#2
There have been no reports of issues with the WD circuit on this CPU. It has been in production since 2008.
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#3
(04-23-2019, 10:09 AM)steve.milici Wrote: There have been no reports of issues with the WD circuit on this CPU. It has been in production since 2008.

Yet again, there were no reported problems with the ACC24E3 amp enable circuit either, but the ECO process on that one is a major headache for us right now. The CPU uses the same opto relay and I just was hoping someone could look at the schematic and verify if the same driver nand gate was used and/or the same pullup. I am just hoping we can be proactive.
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#4
This circuit has been reviewed. It has a much better pre-driver and properly sized pull-up resistors. We do not feel that there would be any issues as in the ACC-24E3.
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