Aim tti 3 3v 5v 1a dual power supply aim tti ql355tp sii p the aim tti ql355tp sii represents the next generation of high performance laboratory power supplies maintaining the tradition started with the pl series in 1980 and continued throughout more than two decades p p the aim tti ql355tp sii offers an unparalleled level of precision voltage and current are controlled using instrumentation quality 16 bit dacs enabling voltages to be set to 1mv resolution even at full outpu