Compared with the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch, the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch is more convenient than the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch.

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Compared with the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch, the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch is more convenient than the overcurrent protection detection circuit composed of the voltage divider resistor + comparator + analog switch. [Copy link]

What are the advantages and disadvantages of this overcurrent protection detection circuit composed of voltage divider resistor + comparator + analog switch compared to the milliohm current sensing resistor Rsens + MCU ADC? Isn't the current sensing resistor Rsens + MCU ADC more concise?

xutong

advantage

1. The time required to implement analog circuits will be very short

shortcoming

1. The structure is relatively complex

at last:

Specific circuit analysis, MCU's OFFSET and GAIN ERROR may not be ideal, do you need precise protection? No, in fact, they are the same