Discharging circuit with stable power and method thereof

The invention provides a discharging circuit with stable power and a method thereof, and the discharging circuit comprises a detection circuit and a node voltage discharging circuit. The detection circuit is used for sampling node voltage and performing analog-to-digital conversion on the node voltage; the node voltage discharge circuit is coupled to the detection circuit and used for selecting a corresponding discharge current according to the node voltage after analog-to-digital conversion and discharging the node voltage through the discharge current, and the smaller the node voltage is, the larger the corresponding discharge current is. In the whole discharging process, the discharging power is relatively stable, so that the phenomenon that the service life of the chip is influenced due to serious heating of the chip caused by high discharging power is avoided; and very small discharge power is not caused, and limited discharge time is not wasted. 本发明提供了一种功率稳定的放电电路及其方法，其中，放电电路包括检测电路和节点电压放电电路。检测电路用于采样节点电压，