SINCERA is the trademark name of Huaxin Technology. The scope of registered products is: multilayer ceramic chip capacitors, etc.

SMD capacitor is a kind of capacitor material. The full name of chip capacitor is: multi-layer (laminated, laminated) chip ceramic capacitor, also called chip capacitor, chip capacitor. There are two ways to express chip capacitance, one is expressed in inches and the other is expressed in millimeters.

The parameters included in the naming of chip capacitors include the size of the chip capacitor, the material used to make the chip capacitor, the required accuracy, the required voltage, the required capacity, and the terminal requirements. and packaging requirements. Generally, the parameters that need to be provided when ordering chip capacitors include size, required accuracy, voltage requirements, capacity value, and required brand.

Extended information:

The functions of capacitors have the following four points:

1) Bypass

The bypass capacitor is a local device An energy storage device that provides energy, which can even out the voltage regulator's output and reduce load requirements. Like a small rechargeable battery, the bypass capacitor can be charged and discharged into the device. In order to minimize the impedance, the bypass capacitor should be as close as possible to the power supply pin and ground pin of the load device. This is a good way to prevent ground potential rise and noise caused by excessively large input values. Ground potential is the voltage drop across the ground connection when a large current spike passes through it.

2) Decoupling

Decoupling, also known as decoupling. From a circuit perspective, it can always be distinguished into a driven source and a driven load. If the load capacitance is relatively large, the driving circuit must charge and discharge the capacitor to complete the signal transition. When the rising edge is relatively steep, the current is relatively large, so the driving current will absorb a large power supply current. Since the circuit Compared with normal conditions, this current is actually a kind of noise, which will affect the normal operation of the front stage. This is the so-called "coupling".

3) Filtering

Theoretically (that is, assuming that the capacitor is a pure capacitor), the larger the capacitor, the smaller the impedance, and the higher the passing frequency. The voltage at both ends of the capacitor will not change suddenly. It can be seen that the higher the frequency of the signal, the greater the attenuation. It can be said vividly that the capacitor is like a pond, and the water volume will not change due to the addition or evaporation of a few drops of water. It converts changes in voltage into changes in current. The higher the frequency, the greater the peak current, thereby buffering the voltage. Filtering is the process of charging and discharging.

4) Energy storage

The energy storage capacitor collects charges through the rectifier and transmits the stored energy to the output end of the power supply through the converter leads. Aluminum electrolytic capacitors (such as EPCOS's B43504 or B43505) with a voltage rating of 40 to 450 VDC and a capacitance value of 220 to 150 000 μF are more commonly used. Depending on the power requirements, devices are sometimes connected in series, parallel or a combination thereof. For power supplies with power levels exceeding 10KW, larger can-shaped screw terminal capacitors are usually used.

Baidu Encyclopedia-SMD Capacitors

Official website of the State Trademark Office-SINCERA