Patent ID: 8686700

Claim:
A boost type power converting apparatus, comprising: a boost type power converting circuit, having an output terminal, receives an input voltage and generates an output signal at the output terminal according to the input voltage, the boost type power converting circuit outputs the output signal to a load; and a protection circuit, coupled between the boost type power converting circuit and the load to form an electrical loop, and turning on or turning off the electrical loop according to the output signal, wherein the protection circuit comprises: a high-end detecting circuit, coupled to the load and the boost type power converting circuit, for receiving the output signal and accordingly generating a stop signal according to the output signal, and transmitting the stop signal to the boost type power converting circuit to disable a pulse width modulation (PWM) signal generated in the boost type power converting circuit; and a switch module, coupled between the load and a ground voltage in series, and coupled to the boost type power converting circuit, for receiving the PWM signal, and being turned on or off according to the PWM signal.