Patent ID: 8674653
Filing Date: 2014-03-18
Classification: B60L,H02J,H02M,Y02T

Abstract:
1. A DC-DC converter comprising: a power conversion unit comprising a switching element, wherein the power conversion unit steps down a voltage of a first battery by driving the switching element, and wherein the power conversion unit supplies the stepped-down voltage to a second battery and a load; a load amount detector that detects a load amount of the power conversion unit; a charge detector that detects whether or not the first battery is being charged; a switching frequency setting unit that sets a switching frequency of the switching element based on the load amount when the charge detector detects that the first battery is not being charged, and sets the switching frequency of the switching element to a predetermined value when the charge detector detects that the first battery is being charged; and a switching controller that controls the driving of the switching element at the switching frequency set by the switching frequency setting unit.