The PA03 is a 30A, 150V power operational amplifier capable of 500 Watts of internal power dissipation thanks to its hermetically sealed, copper MO-127 12-pin metal PowerDIP package. The superior thermal conductivity of copper allows substantially higher power ratings, while the pin count provides additional control features.
The PA03 incorporates innovative current limit circuits to minimize internal power dissipation to a curve approximating the safe operating area of the power transistors. The internal current limit of 35A is supplemented with thermal sensing which reduces the current limit as the substrate temperature rises. Furthermore, a subcircuit monitors actual junction temperatures and with a response time of less than ten milliseconds reduces the current limit further to keep the junction temperature at 175°C.
The PA03A is the A grade version to provide enhanced performance in the areas of offset voltage, bias current and offset current.