Low-voltage protection circuit

The utility model discloses a low-voltage protection circuit which is characterized by comprising an input filtering protection circuit, a DC/DC drive circuit, an LED load circuit, an LDO module circuit, an MCU module circuit, an input detection circuit, a low-voltage protection ADC detection circuit and an over-temperature protection NTC detection circuit. An input power supply provides a clean power supply for the DC/DC and the LDO through the filtering protection circuit. The topological structure of the DC/DC drive circuit is a BOOST boost constant current circuit, and the enable pin and the analog dimming pin of the DC/DC chip are controlled by the MCU. The MCU controls the DC/DC driving circuit by sampling the input voltage ADC, and when the input voltage is lower than a set threshold value, the enabling pin of the DC/DC chip is closed, the DC/DC driving circuit does not work, and the LED load is extinguished, so that the purpose of protection is achieved. The circuit is simple in structure, mature in a