Other Parts Discussed in Thread: TAS5611
We are using the TAS5611A (X2 to drive a dual voice coil driver, 2ohms per coil) & we have based the design on TI’s Typical Differential (2N) PBTL application with BD Modulation filters (also please note we now have INPUT_D going directly to ground)
We are finding that the TAS5611A is failing shortly after 5-10min into a 2ohm resistive dummy load & at 100Watts (after fault - 12V VDD line is shorted to ground within the device)
We also have the TI EVM board (TAS5611PHD2EVM) & have noticed that on the schematic page you have in a boxed area a note on “3ohm Load Operation” :
1) Mount Schottky diodes D24, D25, D26, D27
2) Change ROC = 22Kohm (R12)
Throughout the TAS5611A Data-sheet these above changes are not mentioned when “loads of 3ohm” (or is it <= 3ohms) are used. We want to know if we need to fit these Schottky diodes & change the ROC value accordingly to prevent the device from failing?
Can you please also suggest a part for these Schottky diodes if needed?