Wide voltage adaptable drive and control circuit for hairdryers

A wide voltage adaptable drive and control circuit for hairdryers, comprising a main control-motor driver chip U2, a main power module, a voltage sampling module, and a rectification mode switching module, wherein

• the main power module comprises an input and protection sub-module, an electromagnetic compatibility (EMC) filter sub-module, a bridge rectifier sub-module, a pulse-width modulator (PWM) controller U1 and a low-voltage DC output sub-module which are connected in sequence;
• signal transmission in between the voltage sampling module, the rectification mode switching module and the main control-motor driver chip U2 is configured;
• the voltage sampling module is used to detect a voltage of at least one node in the main power module and provide feedback to the main control-motor driver chip U2;
• and
• the main control-motor driver chip U2 is used to drive the rectification mode switching module to run based on the voltage fed back by the voltage sampling module, and to switch a running mode of a bridge rectifier sub-module BR1 between a full-wave rectification mode and a voltage doubling rectification mode.