SMD tantalum polymer capacitors from AVX now include TCN devices, claimed to deliver the industry's highest CV rating in a low profile package. TCN tantalum polymer capacitors use an ‘undertab' design to optimise the internal maximum volumetric efficiency, enabling these parts to offer the popular 150µF at 6.3V rating in an L case measuring just 3.5x2.8mm and with a profile of only 1mm. The capacitor is popular in mobile phones for power module stabilisation. The additions continue the miniaturisation trend in electronic devices, allowing designers to produce smaller, thinner mobile devices or to increase functionality within the same product dimensions. The first TCN parts that have been released include 150uF 6.3V devices in two 3528 case sizes - L case with a profile of 1mm and the T case which measures 1.2mm high. Further high volumetric efficiency TCN series ‘undertab' polymer capacitors will be released during 2011. The capacitors are suitable for continuous operation with just 20% voltage derating due to their reduced ignition failure mode and surge current robustness. TCN polymer tantalum capacitors are RoHS-compliant and contain no halogens. The conductive polymer cathode is inherently low oxygen bearing which helps to negate ignition failures, says the company.
