Patent ID: 7847702
Filing Date: 2010-12-07
Classification: H03K

Abstract:
1. A power supply controller comprising: a semiconductor switching element disposed on a current supply line from a power source to a load; a control circuit configured to receive an ON signal and an OFF signal, and further configured to turn ON said semiconductor switching element based on reception of said ON signal and turn OFF said semiconductor switching element based on reception of said OFF signal; a first determination circuit configured to output a first signal if an input-to-output voltage of said semiconductor switching element is smaller than a first threshold; a second determination circuit configured to output a second signal if a control-to-output voltage of said semiconductor switching element is equal to or larger than a second threshold; and a short detecting circuit configured to output a short anomaly signal indicating a short anomaly of said semiconductor switching element if at least one of said first signal from said first determination circuit and said second signal from said second determination circuit is outputted during reception of said OFF signal.