Voltage conversion module and bobbin

A voltage conversion module comprising:

• a front side magneto-sensitive unit;
• a voltage conversion unit having:
• a circuit board having a base portion and an expending portion connected to the base portion, wherein a penetrating hole is formed on the expending portion, and a magnetic sensitive layer is disposed on the expending portion for interacting with the front side magneto-sensitive unit;
• a rectifier disposed on the base portion;
• and
• a filter disposed on the base portion, wherein the filter and the rectifier are electrically connected;
• a core group;
• and
• a bobbin comprising:
• an accommodating part comprising:
• a first opening disposed at an entrance side of the accommodating part for accommodating the voltage conversion unit;
• and
• a second opening disposed at an opposite side which is opposite to the entrance side of the accommodating part;
• a spacer, wherein a winding part is formed between the spacer and the accommodating part;
• and
• a through channel, wherein the through channel penetrates the accommodating part and the spacer;
• wherein, the front side magneto-sensitive unit and the voltage conversion unit are accommodated in the bobbin and part of the core group penetrates the through channel and the penetrating hole.

A bobbin comprising:

• an accommodating part comprising:
• a first opening disposed at an entrance side of the accommodating part for accommodating at least one voltage conversion unit;
• and
• a second opening disposed at an opposite side which is opposite to the entrance side of the accommodating part;
• a spacer, wherein a winding part is formed between the spacer and the accommodating part;
• and
• a through channel, wherein the through channel penetrates the accommodating part and the spacer;
• wherein, the first opening and the second opening are disposed opposite to each other, and a heat dissipation channel is formed between the first opening, the second opening and an inner wall of the accommodating part.