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This question is about protection features that should be present on PCB.It is not about power integrity.
These features should be present on the power delivery system, either using discrete components or ICs that contain these features:
1. Overvoltage protection: Protect the circuit components in the primary power input into the design is above a threshold.
2. Reverse polarity protection: Protect the circuit if the primary power input polarity is reversed.
3. Overcurrent protection: Shutdown power to the all loads in the circuit if the current exceeds a certain level.
4. Thermal protection: Shutdown voltage regulators if the voltage regulator itself goes above certain temperature threshold.
5. Short circuit protection: This is tied to 3, if there is short circuit, the power supply to all loads must be siezed.
6. Undervoltage protection: This is specific to circuit components, if supply voltage falls below certain threshold the component IC must be put into reset state, this reset signal is removed only when the power rail has become stable again.
These should be present on PCB signal I/O pins:
7. ESD protection: The IC pins that connect to external connectors must have ESD protection. I do not think that the voltage regulator pins need ESD protection but I could be wrong.
8. Overvoltage protection: There must be clamp diodes on the signal I/O lines so that signals going into ICs are clamped to protect the IC.
Are there any other features that must be designed into the PCB circuit that have no function other than protecting the system from damage besides what I mentioned in the list?
These features should be present on the power delivery system, either using discrete components or ICs that contain these features:
1. Overvoltage protection: Protect the circuit components in the primary power input into the design is above a threshold.
2. Reverse polarity protection: Protect the circuit if the primary power input polarity is reversed.
3. Overcurrent protection: Shutdown power to the all loads in the circuit if the current exceeds a certain level.
4. Thermal protection: Shutdown voltage regulators if the voltage regulator itself goes above certain temperature threshold.
5. Short circuit protection: This is tied to 3, if there is short circuit, the power supply to all loads must be siezed.
6. Undervoltage protection: This is specific to circuit components, if supply voltage falls below certain threshold the component IC must be put into reset state, this reset signal is removed only when the power rail has become stable again.
These should be present on PCB signal I/O pins:
7. ESD protection: The IC pins that connect to external connectors must have ESD protection. I do not think that the voltage regulator pins need ESD protection but I could be wrong.
8. Overvoltage protection: There must be clamp diodes on the signal I/O lines so that signals going into ICs are clamped to protect the IC.
Are there any other features that must be designed into the PCB circuit that have no function other than protecting the system from damage besides what I mentioned in the list?
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