Inductor for class D power amplifier and manufacturing method thereof
A manufacturing method and inductor technology, which is applied in the direction of inductors, fixed inductors, fixed signal inductors, etc., can solve the problems of not absorbing materials, low production efficiency, and complicated alignment, so as to reduce the process, realize automatic feeding, cost reduction effect
Active Publication Date: 2018-02-27
SHENZHEN SUNLORD ELECTRONICS
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Problems solved by technology
The alignment of the whole production process is complicated, time-consuming and low in production efficiency
And the combined product is not a complete closed plane at the top, there are gaps
This gap leads to the problem that the material cannot be picked up by the vacuum nozzle during the automatic placement process.
Method used
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Embodiment Construction
[0032] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0033] refer to Figure 3 to Figure 7 , in one embodiment, a class D power amplifier inductor, comprising a cap core 1, two rod cores 21, 22, two coil windings 31, 32 and a base 5, cap core 1 The top surface of the cap magnetic core 1 is closed, and the bottom surface of the cap magnetic core 1 is opened to form two cavities 1a, 1b, and the two cavities 1a, 1b are separated by an intermediate wall. The two rod magnetic cores 21 , 22 are independent of the cap magnetic core 1, two rod magnetic cores 21, 22 are inserted into two coil windings 31, 32 respectively, and the two coil windings 31, 32 inserted with the rod magnetic cores 21, 22 are respectively inserted into In the two cavities 1a, 1b, the base 5 covers the bottom surface of the cap magnetic ...
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Abstract
The invention discloses an inductor used for a class D power amplifier. The inductor comprises a cap body magnetic core, two rod magnetic cores, two coil windings and a base. The top face of the cap body magnetic core is closed. An opening is formed in the bottom face of the cap body magnetic core so that two cavities can be formed. The two cavities are separated through a middle wall. The two rod magnetic cores are independent of the cap body magnetic core. The two rod magnetic cores are inserted in the two coil windings respectively and arranged in the two cavities respectively. The bottom face of the cap body magnetic core is sealed by and covered with the base. Terminals of coils are led out of electrode holes in the base. The invention further discloses a manufacturing method of the inductor. By means of the inductor, the production cycle can be effectively shortened, cost is reduced, and efficient and automatic production is achieved.
Description
technical field [0001] The invention relates to a magnetic electronic component, in particular to an inductor for a class D power amplifier and a manufacturing method thereof. Background technique [0002] In the audio field, there are four types of common audio amplifier circuits: Class A, Class B, Class AB and Class D. Compared with other circuits, the class D power amplifier circuit has the main advantages: (1) small size; (2) high efficiency; (3) low cost. In the current class D 2-in-1 structure design, it is usually composed of 3 or 4 magnetic cores + coil + base. The existing inductor structure for class D power amplifier is as follows: figure 1 As shown, the schematic diagram of its explosion is shown in figure 2 shown. [0003] In the actual production process of this structure, the magnetic core coil needs to be positioned and assembled multiple times. The assembly process requires many fixing tools for fastening, and the fastening tools cannot be removed durin...
Claims
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IPC IPC(8): H01F17/04H01F27/24H01F27/26H01F27/30
CPCH01F17/045H01F27/24H01F27/266H01F27/306
Inventor 何海根刘燕沈品帆侯勤田
Owner SHENZHEN SUNLORD ELECTRONICS