Power supply starting circuit and power supply module

Abstract

The utility model discloses a power supply starting circuit and a power supply module. The power supply starting circuit comprises a power supply chip, a switch module and a control module. The power supply chip comprises a high-voltage VH pin, and when the power supply chip is not connected to a working power supply, the power supply chip is connected to an external power supply based on the VH pin to start the power supply module; the switch module is arranged between an external power supply and the VH pin and is used for controlling the connection relation between the external power supply and the VH pin based on the on-off state of the switch module; the control module is connected with the switch module and used for controlling the switch module to be cut off after a working power supply is connected. The power module is used for generating working power. The switch module is arranged between the external power supply and the VH pin of the power supply chip, and after the power supply module generates the working power supply, the control module controls the switch module to cut off and disconnect the connection between the external power supply and the power supply chip, so that the voltage difference between the VH pin and the adjacent pin is reduced, and the ignition risk of the power supply chip and the standby power consumption of the power supply module are reduced.