Consumer Peripherals

TVS Diode Arrays for ESD Protection

05 July 2017

SP11xx Series. Image credit: Littelfuse, Inc.SP11xx Series. Image credit: Littelfuse, Inc.Circuit protection provider Littelfuse, Inc., has introduced a series of TVS Diode Arrays (SPA Diodes) optimized to protect DC powerlines for PoweredUSB interfaces from electrostatic discharges.

The SP11xx Series TVS Diode Arrays protect each I/O pin in the interface by employing Zener diodes fabricated in a proprietary silicon avalanche technology. These devices offer high surge tolerance, and extremely low dynamic resistance across all relevant voltage levels for PoweredUSB interfaces. They can absorb repetitive electrostatic discharge strikes (ESD) at ±30kV without performance degradation, and dissipate 80A of 8/20μs surge current with very low clamping voltages.

By limiting exposure to the fast transients associated with plugging into AC/DC converters, the devices are designed to prevent premature failure or thermal issues related to fast-charging batteries, such as those used in tablets and smartphones. They are also useful for protecting Vbus lines for USB 3.1 type C interfaces.

Key benefits include:

  • Extremely low dynamic resistance ensures faster response to ESD transients.
  • Discrete unidirectional design provides the lowest dynamic resistance available.
  • Flat surge performance across current profiles provides greater protection during ESD or extreme surge events.

Additional applications include ESD protection for switches/buttons, test equipment/instrumentation, point-of-sale terminals, medical equipment, notebooks/desktops/servers, computer peripherals and automotive electronics.

The SP11xx Series (surface mount 1610 package) is provided in tape and reel format in quantities of 3,000. Sample requests may be placed through authorized Littelfuse distributors worldwide.

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