Patent ID: 9231474
Filing Date: 2016-01-05
CPC Classification: G09G,H02M,H05B,Y02B

Claim Text:
1. A DC/DC converter comprising: an input terminal; an output terminal; an inductor whose one end is connected to the input terminal; a switching element connected between the other end of the inductor and an earth; a diode connected between the other end of the inductor and the output terminal; a capacitor connected between the output terminal and the earth; a feedback circuit connected between the output terminal and the earth, the feedback circuit outputting a feedback voltage obtained by dividing an output voltage of the DC/DC converter; an oscillating circuit to which the feedback voltage is inputted, the oscillating circuit performing an ON/OFF control of the switching element at a frequency corresponding to the feedback voltage; a detection circuit which detects an external magnetic field and outputs a signal that is different depending on whether or not the detected external magnetic field exceeds a predetermined threshold; and a control circuit to which the signal is inputted, the control circuit performing a control of the DC/DC converter according to the signal, to suppress an overcurrent of the DC/DC converter in a strong magnetic field.