Patent ID: 9252664
Filing Date: 2016-02-02
CPC Classification: H02M

Claim Text:
1. A DC-DC converter comprising: an input terminal to which a positive electrode of a DC power supply is connected; an output terminal to which a load is connected; a power supply line of the DC power supply extending from the input terminal to the output terminal; a voltage converter circuit that is disposed between the input terminal and the output terminal, has a first switching element having one end connected to the power supply line, and boosts or steps down a voltage of the DC power supply depending on an on/off-operation of the first switching element to supply the voltage to the load; and a capacitor having one end connected to the power supply line, and further comprising: a short-circuit protection second switching element connected in series with the first switching element on the other end side of the first switching element; and a detector that detects a short-circuit failure in the first switching element or the capacitor to turn off the second switching element, wherein the other end of the capacitor is connected to a connection point between the first switching element and the second switching element, and the detector detects a failure on the basis of a voltage at the connection point.