The HV9931 is a fixed frequency PWM controller designed to drive proprietary single-stage single-switch no-isolated topology,cascading an input power factor correction(PFC)buck-boost stage and an output buck converter power stage.

• HVV9931是一个设计用于驱动专利单级单开关非隔离拓扑,级联一个输入PFC降压-升压级和输出降压变换器级的固定频率PWM控制器。