Fast Charge EOS Solution OVP and TVS
EOS is the acronym for Electrical Over Stress in English, which means electrical overstress, which means that too much voltage and / or current signal is added to the subject, it can not stand, it is damaged, so say "over "". There are three ways to generate EOS: high voltage, high current, high voltage + high current. In fact, ESD events are just one of the short-term high voltages of EOS, so for EOS, you must consider more current and duration. The charging environment of our mobile phones is more and more complicated, there are car chargers, solar chargers, wall chargers, mountain chargers, fast chargers, etc., and fragile mobile phones must withstand various types of chargers. And more mobile phones cause damage to the PMU or the charging IC due to overvoltage and overcurrent of the charging circuit, causing a malfunction. Less developed countries, such as India and Africa, have been the hardest hit areas of the EOS incident, which are the reasons why the grid is more unstable in underdeveloped areas. So mobile solution companies have already provided reliable solutions for EOS. Based on the needs of customers such as Huawei and OPPO, Thunder Electronics has developed a variety of reliable solutions for your current EOS solutions. EOS test demand indicators: There are no specific over-voltage test indicators in the current domestic standards, but the products involved in export will raise relevant requirements. From the overvoltage surge of 300V in 2015, there are already customers who need to test 500V. Both show the customer's high requirements for overvoltage reliability. Overvoltage protection is actually very simple, but it is really difficult in mobile phones. The difficulty lies in the fact that the space of the mobile phone is limited. We must design a chip large enough to be packaged in a small enough size. The above combination scheme uses the characteristics of three materials: PSMFJ24CA is a high-power TVS chip packaged in SOD-123FL with a power of 5000W. It can be tested to meet the performance requirements of 250A and clamping voltage of 30V. The primary protection can be selected according to the terminal requirements, 7V and 12V products. The OVP3881 is an overvoltage protection chip whose protection voltage can be adjusted to the value required by the customer according to the threshold voltage of the main chip. The back end uses SD4501P4-3, which is also a high-power TVS. The package DFN2020 has a large current due to low voltage. The following is a list of test data for this TVS.
What is a Capsule Slip Ring?
Capsule slip rings are a type of electrical connector that are used to transfer power and data between two rotating objects. They are commonly used in applications where there is a need to send or receive signals from a stationary object to a rotating one, or vice versa.
How Does it Work?
Capsule slip rings work by using a series of electrical contacts that rotate with the object on which they are mounted. These contacts are spaced evenly around the circumference of the ring, and as they rotate they make and break contact with corresponding contacts on the other object. This allows power and data to be transferred between the two objects without any interruption.
Advantages of Capsule Slip Rings
There are several advantages to using capsule slip rings in place of other types of electrical connectors.
For example, the rotation of the contacts causes them to be freely accessible and therefore free from dust and debris. This makes them ideal for applications where connector maintenance is often a problem.
Because the contacts are freely accessible, they can be readily replaced if a fault occurs. They also have very low electrical resistance, making them ideal for transmitting radio frequency signals. Because of the low resistance, this type of connector is often used in high-speed data transmissions.
This type of Conductive Slip Ring is similar to the shape of a hat. The brim part is a flange with a conductive slip ring. The function of the flange is to facilitate installation. It is connected to electrical equipment through the fixing hole of the flange. It can be firmly installed on the equipment. Therefore, the stator of the cap-type slip ring is generally fixed by the outer layer with a flange, and the inner part is the rotor with the inner shaft rotating. The stator and the rotor are not fixed, and the details will be different according to the installation method.
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