Apex Microtechnology ~ High Density, High Voltage Power Amplifier ICs High Density, High Voltage Power Amplifier ICs, 220 Volts, 10 Amps PEAK The PA164, PA165 are new, high density power amplifier ICs scheduled for release in mid-2017. Featuring a very small footprint, these ICs provide 1A (PA164) and 4A (PA165) output current continuously, and up