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TAS2505-Q1: I2C CLK line locked low

Part Number: TAS2505-Q1


I connect to the question asked here as we have encountered this behavior on one of our products.

During the temperature tests (over 80°C ambient temperature) we saw that, after the amplifier's supply voltage exceeds the undervoltage voltage, the I2C clock line is stuck down, creating problems in the initialization of the components present on that bus. This behavior is not seen at every rebbot but rather randomly, especially if the board has been on for a while.

We removed the component and the problem disappeared. When the component was replaced again, the problem recurred.

We also tried to reset the chip but it didn't work.

We checked that the power-on sequence is ok and the sequence is respected. Furthermore, we checked the impedance on the I2C_CLK net and compared with a golden Sample and the result are good, no difference between them.

Do you have any suggestions or workaround to resolve this issue?