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Q: TAS5142, short circuit detection
I would like clarification on the TAS5142 power stage short circuit detection. Is the short circuit detection monitoring for shorts between the differential outputs or between each output and PVDD/GND? Also, is there any other literature you can send me on how the fault is deemed short circuit as opposed to over current.
A: Re: TAS5142, short circuit detection
There is really no difference between a short circuit and over current protection in this family.
Yes, we can protect against overload conditions due to excess load current, shorts to ground, shorts to PVDD, AFTER the output filter.
TAS5342 actually has protection to find shorts upon power up, before the filter -- during manufacturing, sometimes there is a solder bridge between two pins. THe TAS53xx family can detect this and shut down prior to powering up. This prevents the chip from failing. The older parts, like TAS51xx family, will be destroyed under these conditions.
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