Hi All.
I have attached a picture of a design I am working on.
As the topic states, I would like some help with expert advice on a current project.
I am designing a battery powered IoT sensor Node which will form part of a Mesh network. For my particular use case, there will be little or no human interaction with the device except possibly during installation and response. As such, a core requirement is for the batteries to last as long as possible irrespective of:
I would like the device to be semi smart by detecting the presence of a battery voltage through the "Power Good" output of a decent boost converter. This will alert the Micro-controller to turn off the P-Channel Mosfet, cutting off power to the sensors sourced from the alkaline battery.
My Dilemma:
As a relative NOOOOOB to this thing, I am still getting my head circuit analysis. I am particularly concerned that the Power Good signal alert, and Mosfet switch will not be completed before the battery voltage is seen at regulators Vout by the circuit. I am not too sure but I would imagine that could cause some interesting electronic undesired effects. That shouldnt be my only dilemma i reckon. But it is my current one.
My Question
As the topic says.....HELP!!! okay more of a request than a question. Any guidance, advice, hints, tips, tricks on whether this is a sensible solution will go a long way. Also guidance on resistor value selection for the Mosfet.
P.S: Advice on gate drivers and Mosfet modules will also help.
Thank you all in anticipation.
I have attached a picture of a design I am working on.
As the topic states, I would like some help with expert advice on a current project.
I am designing a battery powered IoT sensor Node which will form part of a Mesh network. For my particular use case, there will be little or no human interaction with the device except possibly during installation and response. As such, a core requirement is for the batteries to last as long as possible irrespective of:
- Power Demanding RF front-end
- Potential prolonged computations
- Pseudo real-time sensor measurements from relatively low rated sensors
- 2 Battery supply sources:
- 2s1p Alkaline Battery (3v): This is the Normal supply that comes default with the device. It is responsible for powering the whole device (RF, Core & Sensors) in the absence of the other power source.
- 3v Li Coin Cell: This is going to serve as the supply for the sensors power domain. The idea is for this power supply to complement the other supply by taking control of feeding power to the sensors of the device.
I would like the device to be semi smart by detecting the presence of a battery voltage through the "Power Good" output of a decent boost converter. This will alert the Micro-controller to turn off the P-Channel Mosfet, cutting off power to the sensors sourced from the alkaline battery.
My Dilemma:
As a relative NOOOOOB to this thing, I am still getting my head circuit analysis. I am particularly concerned that the Power Good signal alert, and Mosfet switch will not be completed before the battery voltage is seen at regulators Vout by the circuit. I am not too sure but I would imagine that could cause some interesting electronic undesired effects. That shouldnt be my only dilemma i reckon. But it is my current one.
My Question
As the topic says.....HELP!!! okay more of a request than a question. Any guidance, advice, hints, tips, tricks on whether this is a sensible solution will go a long way. Also guidance on resistor value selection for the Mosfet.
P.S: Advice on gate drivers and Mosfet modules will also help.
Thank you all in anticipation.
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