I have designed a PCB used in a low battery powered application. The device sleeps most of the time so power consumption is very important. I have an issue on the part of the circuit that reads from a couple of sensors. The power to the circuit is controlled by a SBC847 transistor that is switched on and off by the MCU. For some reason, when the transistor is switched off, some of the components on the sensor circuit is still pulling 0.5V instead of 0V which is causing the battery to deplete faster than it should. I have breadboarded the circuit and do not experience the same issue as I do on the PCB. I am seeking guidance from someone to review the specific part of the circuit, not the entire PCB and help find the issue. This will not require any schematic or PCB design. Just a review of my existing schematic for the specific section and then a recommendation. The circuit was designed in Kicad so I can provide a schematic and/or PCB drawing. Thanks.
Posted On: November 22, 2020 23:17 UTC
Category: Electronic Engineering
Country: United States
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