I’d like to ask the TI engineers the following if they make sense?
- Is the part sensitive to power supply sequencing? We normally power up V+ first then V-; reverse for power down (V- followed by V+). However, when we abort the test, the power down sequence is V+ followed by V-.
- During an abort power down, we do see some oscillations on the output while +V supply is off and the -V supply is still discharging. From what we have captured on a “good” part (one that’s still functioning) is about a 2V-3V (with peaks to 6V-7V) while V- only is applied (~7V-8V). Is this still considered within the SOA condition? The primary windings of our transformer is only 200 mΩ of resistance.