Abstract: A conversion device includes a primary side circuit, a secondary side circuit, a transformer, and a control circuit. The primary side circuit includes a primary side switch and is configured to receive an input voltage. The secondary side circuit outputs an output voltage to a load. The transformer comprises a primary winding and a secondary winding, the primary winding is electrically coupled to the primary side circuit and the secondary winding electrically coupled to the secondary side circuit. The control circuit is configured to control a peak value of the current of the primary side switch, to be limited in a band range.

Abstract: A rotatable module includes a first connecting member, a second connecting member, and a pivotal shaft. The first connecting member is rotatably sleeved on the pivotal shaft. The second connecting member is non-rotatably sleeved on the pivotal shaft. One of the second connecting member or the first connecting member forms a resisting portion, and the other one of the second connecting member or the first connecting member forms at least one limiting portion. Both the resisting portion and the at least one limiting portion are substantially V-shaped protrusions. An extending direction of the resisting portion is substantially parallel to an extending direction of the limiting portion. The resisting portion resists the limiting portion such that the first connecting member rotates within a predetermined angle.