Patent ID: 11336155

Abstract:
To improve the EMC performance of an electronic device on which a motor is mounted. A circuit board (12) comprises a substrate (130), lands (P4, P5) that are formed on a main surface (131) of the substrate (130) and are for connecting a coil (17) of the motor (11), a magnetic detection element (122) that outputs a detection signal corresponding to a position of a rotor (14) of the motor (11), and a motor drive control IC (121) that generates drive signals (VOUTA, VOUTB) for driving the motor (11) based on the detection signal, wherein the magnetic detection element (122) and the motor drive control IC (121) are arranged in a region (AR1) on a side of a minor angle (θ) formed by a first straight line (a) and a second straight line (b) among regions that are on the main surface and are defined by the first straight line and the second straight line when viewing the substrate (130) from the main surface side, the first straight line connecting the land (P4) and an axis of an output shaft of the motor (11), the second straight line connecting the land (P5) and the axis of the motor (11).