Basic knowledge of patch fuse

时间:2019-11-04 丨 预览:392 人次

First understand the function of the fuse: if the circuit fuse is placed correctly, then the fuse will rise to a certain height and after a certain period of time, the fuse will cut off the current, thereby protecting the operation of the circuit, and the principle of the chip fuse is the same but the style Same as below, let us know in detail:

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SMD fuses are used in lithium batteries, digital cameras, inverters, LED drivers, notebook computers, backlights, LCD driver circuits, power tools, electric toys and other electronic products. From traditional glass tube fuses to miniature fuses and chip fuses, due to differences in product technology, their choices are slightly different. The selection of SMD fuses involves the following factors: ED drivers, notebook computers, backlights, LCD driver circuits, power tools, electric toys and other electronic products.

From traditional glass tube fuses to miniature fuses and chip fuses, due to differences in product technology, the choice of focus is slightly different. Pulse, inrush current, inrush current, starting current and circuit transients. SMD fuses are particularly concerned about this. Due to the small process size, the impact resistance of chip fuses is much smaller than that of glass tube fuses or other bulk fuses of the same rated current. The magnitude of the circuit overload current and the shortest and longest time of the overload current. Usually need to use oscilloscope test and theoretical calculation to determine the magnitude of overload current. The basic requirement for a fuse is (for example, when there is an inrush current), and it must be interrupted at an appropriate time (for example, when there is a need for overload current to be cut off) to power off.

The applied voltage applied to the fuse usually applies the chip fuse to portable equipment, and the operating voltage of the circuit is usually not high. The rated voltage of the chip fuse is higher than the working voltage of the circuit, so you can use it with confidence. Product certification basically needs to be used more for export. This will not be explained much.