公开(公告)号：US12282056B2

公开(公告)日：2025-04-22

申请号：US18347137

申请日：2023-07-05

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Noboru Inomata

IPC: G01R31/28

Abstract: A disconnection detector circuit that can favorably inspect a connection state of a wire without increase in parasitic capacitance is provided. A semiconductor device includes, in one package, a first integrated circuit including a transformer including a primary coil and a secondary coil, and a second integrated circuit connected to a midpoint and one end of the secondary coil. The second integrated circuit includes a reference line and a detector circuit. The reference line connects the midpoint of the secondary coil and a reference potential. On basis of a potential at a predetermined reference point of the first power supply line, the detector circuit detects whether a connection state between the second integrated circuit and the secondary coil is normal or abnormal.

公开(公告)号：US11575319B2

公开(公告)日：2023-02-07

申请号：US17138881

申请日：2020-12-30

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Masayuki Ida ,  Yasuhiko Kokami ,  Hideyuki Tajima ,  Hiroyuki Inoue ,  Noboru Inomata

IPC: H02M3/158 ,  G05F1/46 ,  H02M1/00 ,  H03K17/687 ,  H03K19/20

Abstract: A DC-DC converter includes a high-side switch coupled between a first power supply and an output terminal, a low-side switch coupled between a second power supply and the output terminal, an inductor coupled to the output terminal, and a reverse current monitoring circuit that determines that a reverse current from the inductor to the output terminal occurs when the output terminal becomes a high voltage during a state in which the high-side switch and the low-side switch are in a dead time.