DC-DC converter
AssigneeMitsubishi Electric Corporation
InventorsFumio Wada, Hiroya Sannai
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Abstract
An object is to provide a technique enabling conversion efficiency to be increased irrespective of an operating ambient temperature. A DC-DC converter includes switching elements, a drive unit which drives the switching elements to conduct synchronous rectification, a freewheel diode connected in parallel to the switching element, and a temperature detection circuit which detects a temperature of the freewheel diode. The drive unit stops driving the switching element when the temperature detected by the temperature detection circuit is equal to or lower than a predetermined first threshold value.
Claims4
A DC-DC converter comprising:
- a high-side switching element and a low-side switching element;
- a drive unit which drives said high-side switching element and said low-side switching element to conduct synchronous rectification;
- a freewheel diode connected in parallel to said low-side switching element;
- and
- a temperature detection unit which detects a temperature of said freewheel diode,
- wherein when a temperature detected by said temperature detection unit is equal to or lower than a predetermined first threshold value, said drive unit stops driving said low-side switching element, and wherein
- a plurality of said low-side switching elements are connected in parallel to each other, and
- said drive unit changes the number of said low-side switching elements to be driven based on a temperature detected by said temperature detection unit.
Dependencies are inferred from the claim text.