Are there any other options for an extremely low loss switching circuit with extremely low switching frequency (about 4 times per day) and voltages from 0-3V with currents <2mA.
Current ideas include:
- latching relays (<100mOhm, but use ~50mW for 5ms to switch) => would only consume power during switching, which is infrequent
- analog signal switches (have about 100mOhm resistance and leakage/quiescent current in the tens of nA range) (eg. TI ts3a24159) => continuous quiescent power consumption
Does anyone have other solutions?
FYI: the switches are used in a "rectifier" that only changes the polarity of its input voltage about 4 times per day. It will be part of a TEG (thermal energy generator) that scavenges energy from a temperature difference and stores it in a battery. Since the temperature difference can be of both polarities the TEG will also output two different voltage polarities. So basically I want to minimize the total energy loss over a long period of time.