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Flat Flexible Connectors

1040602017 Application Field and Working Principle

Flat flexible connectors (FFC) and flat panel connectors (FPC) are valued for lightweight construction, as they are thinner than traditional ribbon cables and less expensive to produce than multi-conductor cables. They are typically used in consumer grade electronic devices and pc peripherals such as PDAs, notebook and laptop computers, digital cameras and electronic game systems. Common FFC/FPC uses include cable connections, switches, and other non-mechanical interfacing components.

Typical Applications

The primary applications for FFC and FPC connectors are video and imaging systems, high speed LAN/WAN switching, embedded PC systems, storage and server systems, wireless system architectures, automotive electronics, chassis-level wiring harness, motion control systems, power management and lighting control systems, and virtual instrumentation systems.

Operation Principles

FFC and FPC connectors are capable of providing a secure connection over a wide temperature range. This is achieved by having the two connector mates press against each other with a high level of force ("squeeze" force). This pressurized connection ensures the electrical contact between the two mating connector elements are maintained over a long period of time and through wide temperature variations. This method of connection can also be used in a reverse direction by having the connector mate pull against each other.

Design and Manufacturing Considerations

FFC / FPC connectors are designed to work in a variety of applications where lightweight construction and/or resistance to environmental factors or extreme temperatures are important factors. The construction of the connector makes it suitable for use in hazardous or explosive locations, since the connection is not achieved through mechanical contact, but via a pressure connection, removing potential for sparks.

When designing FFC / FPC connectors, it is important to consider the mechanical strain that the connection is expected to endure. Many FFC / FPC connectors are designed in a way to provide a number of points of contact along the conductor width or length, to ensure an adequate connection even when the two cable mates are placed at different angles. This concept of providing mechanical strain relief along the conductor width or length is referred to as "tension-flex" design.

In addition to providing adequate strain relief, many manufacturers also use materials which are not affected by exposure to moisture and heat. This helps ensure that the quality of the connection is maintained even under extreme temperatures or environmental exposure. Manufacturers often incorporate a gasket or seal around the connector to provide additional protection against moisture, dust or other environmental factors. Shielding materials are also used to protect against electromagnetic interference (EMI).

Conclusion

Flat flexible connectors (FFC) and flat panel connectors (FPC) offer a cost-effective and lightweight alternative to traditional ribbon cable connectors. They are found in a wide variety of applications, from consumer electronics and PC peripherals through to automotive and industrial applications. Their secure connection over a wide temperature range is achieved through pressurised connections, whilst their design and manufacturing considerations allow them to be used in hazardous or extreme conditions.

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