I have a question about the MMZ25332BT1 power amplifier (PA) that we are using in our radios. Occasionally we see some PA failures that we are still not sure what they are caused by.
Basically we see a dropped current draw from the PA, reduced output power and the Pdet shows 0V (in normal operation the correct voltage is outputed from the Pdet). What can cause such a failure? On one of them we could see the 0V on the Pdet and the full output power. Since this is dual stage PA we assumed that maybe only one stage fails but still cant explain it.
Any comments will be highly appreciated.