88902-122LF

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Backplane Connectors - Specialized: 88902-122LF Application Field and Working Principle

Backplane connectors are electrical connectors used to electrically and physically join a printed circuit board, also known as a PCB, to other PCBs- thus offering an electrical and mechanical interface between one or more forms of PCBs. 88902-122LF connectors are a type of specialized backplane connector used for System Level Interconnect (SLI), Passive Backplane Interconnect (PBI), Serial Presence Detect (SPD) and other applications. In this article, their application field and working principle shall be discussed.

Application Field

8902-122LF connectors are designed primarily as a temperature tolerant, tray-to-tray high density interconnect solution.Typical uses are found in:

• Notebook Computers
• Ultra-portable Computers
• Sub-Notebook Computers
• Laptop Computers
• Tablet PCs
• Server and Workstations
• Graphic Cards
• Peripheral Cards
• Portable Media Players
• Miniature PCs

88902-122LF connectors are usually used in place of 0.8mm Pitches SHD series due to their higher power density, higher mating strength and ability to be configured as either a Tray-to-Tray or vertical layouts.

Working Principle

88902-122LF connectors feature a 2x18 arrangement; two rows of 18 contacts. The first row provides 2.5 A of power and the second row provides 0.5A of control circuitry. The contacts are gold-plated for improved contact capability between mating surfaces and long-term reliability. The mating area is designed for maximum head-on mating assurance, making it easier and faster to achieve a proper connection between the contacts.

The contact design of the 88902-122LF connector is what sets it apart. Its unique contact design provides more power density along with greater temperature capability than other types of connectors. This makes it ideal for power hungry applications such as portable media players, notebook computers and other similar devices.

The 88902-122LF connector also has an integrated cable shielding which helps protect the contacts from EMI (electro-magnetic interference). This helps ensure consistent operation even in high EMI environments. The integrated EMI shield also helps with power supply noise filtering.

The connector is also designed with a press-fit retention feature. This provides additional mechanical stability for the connector during mating and unmating of the contacts and improves reliability by stopping contact bouncing during soldering operations.

Finally, the 88902-122LF offers a mate-before-lock feature. This feature helps to provide an additional level of security to the mating system as it prevents the connectors from being un-mated during the mating process. This feature also helps to ensure that the connectors are firmly and securely engaged before power is applied.

Conclusion

The 88902-122LF is a specialized type of backplane connector specifically designed for high density applications. It is particularly well suited for high power applications such as notebook computers and portable media players. Its contact design provides superior power density and temperature capability compared to traditional connectors and it offers additional features such as an integrated EMI shield and press-fit retention. In addition, it provides an additional measure of security with its mate-before-lock feature.

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