Power converter

Abstract

A power converter having a high side switching device and a low side switching device that are connected in series between a positive power supply terminal and a negative side power supply terminal for direct current, the connection point between the high side switching device and the low side switching device being set as an output terminal, and each of the high side switching device and the low side switching device being constructed by a switching device to which a current mirror device is appended, further including a high side current detecting unit for detecting current flowing in the current mirror device of the high side switching device, and a low side current detecting unit for detecting current flowing in the current mirror device of the low side switching device. A signal detected by the high side current detecting unit and a signal detected by the low side current detecting unit are differentiated from each other and set as a current value of the output terminal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing a first embodiment of a power converter according to the present invention;

FIG. 2 is a block diagram showing a second embodiment of the power converter of the present invention; and

FIG. 3 is a block diagram showing a third embodiment of the power converter of the present invention.

Claims

1. A power converter having a high side switching device and a low side switching device which are connected in series between a positive power supply terminal and a negative side power supply terminal for direct current, the connection point between the high side switching device and the low side switching device being set as an output terminal: wherein each of the high side switching device and the low side switching device is constructed by a switching device to which a current mirror device is appended, and comprising; a high side current detecting unit for detecting current flowing in the current mirror device of the high side switching device; anda low side current detecting unit for detecting current flowing in the current mirror device of the low side switching device;wherein a signal detected by the high side current detecting unit and a signal detected by the low side current detecting unit are differentiated from each other and set as a current value of the output terminal.

2. The power converter according to claim 1, further comprising an over-current protecting unit which is operated by using at least one of the signal detected by said high side current detecting unit and the signal detected by said low side current detecting unit.

3. A vehicle having the power converter according to claim 1 mounted therein.