In-vehicle electronic control unit

An in-vehicle electronic control unit comprising:

• a circuit board having a front surface and a rear surface opposite to the front surface and equipped with a power supply circuit that performs voltage conversion, wherein a coil constituting the power supply circuit is mounted on the front surface of the circuit board;
• a resin member covering the circuit board to protect the circuit board, wherein an outer surface of the resin member has an upper surface and a lower surface opposite to the upper surface, wherein the upper surface of the resin member is located on a front surface side of the circuit board and the lower surface of the resin member is located on a rear surface side of the circuit board, wherein the outer surface of the resin member further has a side surface that connects the upper surface and the lower surface;
• and
• a metal bracket for attaching the circuit board to a vehicle, wherein the metal bracket is fixed to the resin member,
• wherein the metal bracket includes:
• a first shield portion arranged to only a part of the upper surface of the resin member so that when projected in a winding axis direction of the coil, the first shield portion overlaps at least a part of the coil;
• and
• a second shield portion extending from the first shield portion in the winding axis direction of the coil and arranged to only a part of the side surface of the resin member,
• wherein the metal bracket is to be electrically connected to a body of the vehicle.