Voltage band-pass enable circuit

An enable circuit includes a first detection controller with a first input terminal connected to a first input voltage and a first output terminal, a second detection controller with a second input terminal connected to the first input voltage and a second output terminal, wherein the second input terminal further connects to the first output terminal, and a enable switch with a control terminal connected to the second output terminal, a third input terminal connected to the second input voltage and a third output terminal, wherein when the first input voltage is in the range of a first set voltage and a second set voltage, the enable circuit is connected to ground via the second output terminal, and drives the enable switch to open to output an enable signal via the second input voltage from the third output terminal.