Renesas Electronics Corporation

Takahiro Nomiyama

Koji Tateno

Yoshinao Miura

Daisuke Kondo

Hideo Ishii

A switching loss is reduced by reducing a deviation from the operational principle of zero-volt switching (ZVS). A semiconductor integrated circuit includes high-side switch elements Qand Q, a low-side switch element Q, and a controller CNT. A decoupling capacitance Cin is coupled between one end of a high-side element and an earth potential, and the high-side element includes the first and second transistors Qand Qcoupled in parallel. In changing the high-side elements from an on-state to an off-state, CNT controls Qfrom an on-state to an off-state by delaying Qrelative to Q. Qand Qare divided into a plurality of parts inside a semiconductor chip Chip, a plurality of partial first transistors formed by dividing Qand a plurality of partial second transistors formed by dividing Qare alternately arranged in an arrangement direction of Qand Q, inside the semiconductor chip Chip

Semiconductor integrated circuit and method for operating the same

Disclosed is a power conversion circuit that suppresses the flow of a through current to a switching element based on a normally-on transistor. The power conversion circuit includes a high-side transistor and a low-side transistor, which are series-coupled to each other to form a half-bridge circuit, and two drive circuits, which complementarily drive the gate of the high-side transistor and of the low-side transistor. The high-side transistor is a normally-off transistor. The low-side transistor is a normally-on transistor.

Growing community of inventors

Kanagawa, Japan

Takahiro Nomiyama