1. What is the difference between patch inductance and wound inductance
1. Different definitions
Chip inductance is also called power inductance and high current inductor.
It has the characteristics of miniaturization, high quality, high energy storage and low resistance.
The chip inductance is divided into winding type, lamination type and braided type.
Power patch inductors are divided into two kinds with magnetic hood and without magnetic hood, mainly composed of magnetic core and copper wire.
In the circuit mainly plays the role of filtering and oscillation.
The difference between patch wound inductance and I-inductance The most basic difference is that patch wound inductance is patch type without pin, I-inductance is plug-in type with pin, wave pattern will also be different.
2. Classification basis is different
Inductors can be distinguished according to different classification basis.
Patch inductor is the most widely used type of inductor at present. It is more accurately called "chip inductor" and its corresponding plug-in inductor (DIP). The difference between the two is based on the installation method.
Surface mount (SMD) or in-line mount (DIP).
But from the actual work, because the laminated chip inductor is the most widely used, so in fact, we often refer to the chip inductor is one of the special class.
The winding inductors are named based on the manufacturing process and materials. In addition, inductors by process and materials also include ferrite laminated inductors (that is, the class mentioned above is often directly referred to as "chip inductors").
3. Different application scenarios
Chip inductors: Surface mount high power inductors with miniaturization, high quality, high energy storage and low resistance characteristics, mainly used in computer display boards, notebook computers, pulse memory programming, and DC-DC converters.
Winding inductance: excellent end face strength good soldering property, with high Q value, low impedance characteristics, suitable for general welding and back welding, the product is widely used in micro TV, LCD TV, camera.
4. Different encapsulation
Patch inductor: can provide reel packaging for surface automatic mounting, can provide braid packaging, easy automatic assembly
Wound inductance: Surface adhesion type, appearance and size in accordance with EIA standards. Different size specifications are available.
5. Differences in production technology
The inductor of wire wound patch is based on the traditional winding inductor production technology. The plug-in inductor is converted into a patch package, which reduces the volume of inductor and makes it more convenient to use.
Laminated inductors are manufactured by multilayer printing technology and laminated production technology.
6. Performance difference
Laminated patch inductors have good magnetic shielding, high sintering density, good mechanical strength, but the inductance precision, the range of inductance is not as good as that of wound patch inductors.
External wound inductance has the advantages of high Q value, small loss and large passable current.
7. The difference in price
The production of laminated inductors is difficult, the technical requirements are high, the production cost is high, and the price is higher than that of wound inductors.
8. Other differences
The laminated inductance of the patch has better heat dissipation than the inductance of the wound patch. The laminated inductance of the patch can not see the line, and the anti-interference ability of the inductance, heat dissipation and saving installation space are better than the inductance of the wound patch.
The wound inductors are superior in current resistance and inductor production cost, and the ESR value of wound inductors is higher than that of lamination inductors.