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TVS devices provide overvoltage protection & EMI attenuation over a broad range of frequencies in automotive applications

Wed, 08/14/2013 - 2:10pm

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AVX Corporation has introduced the new TransFeed Automotive Series, which combines the best electrical characteristics of its TransGuard Transient Voltage Suppressors (TVS) and its Feedthru Capacitors in a single chip to provide state-of-the-art overvoltage circuit protection and EMI reduction over a much broader range of frequencies than comparable devices. Featuring a unique multilayer ceramic construction in a feedthru configuration, the new TransFeed Automotive Series responds to transient events faster than any TVS device currently on the market and provides significant EMI attenuation when in the off state. Qualified to AEC-Q200, the series is ideal for automotive applications, including: drive by wire, dimming mirror circuits, filtering/protection on microcontroller I/O lines, filtering/protection on interface I/O lines, power line conditioning, power regulation, and LCD dashboard drivers, among others. 

The reduction in parallel inductance typical of the feedthru chip construction (vs. the construction of standard TVS or ceramic capacitor chips) provides the TransFeed Automotive Series with two significant advantages, the first of which is faster turn-on time. Measured response times for TransFeed devices range from 200-250pSec, which is less than half that of the fastest bipolar TVS solutions available. The second electrical advantage of lower parallel inductance coupled with optimal series inductance is enhanced attenuation characteristics. TransFeed Automotive Series varistors exhibit excellent attenuation at high self-resonant frequency with a much flatter roll-off characteristic than comparable devices, resulting in EMI filtering over a much broader frequency spectrum. 

TransFeed Automotive Series varistors feature a working voltage range of 5.6-18VDC, a clamping voltage range of 18-50V, an energy rating of 0.05-0.3J, a peak current of 15-120A, and a maximum feedthru current of 0.2-1A. Rated for use in temperatures ranging from -55ºC to +125ºC, the series is available in 0805 and 0612 cases with Ni Barrier/100% Sn terminations.

Lead time for the series is 14 weeks. Pricing is available upon request. 

The datasheet for TransFeed Automotive Series components is available at: http://www.avx.com/docs/Catalogs/Autotransfeed.pdf.

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