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Mirror tantalum capacitors reduce ESL to 1nH

Posted: 17 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:mirror tantalum capacitors? low ESL?

AVX Corp. has expanded its TPM series to include D- and low-profile Y-case size multi-anode "mirror" configuration tantalum capacitors. Aimed at telecommunication infrastructure, networking, server and military/aerospace applications, the TPM mirror tantalum capacitor delivers low self-inductance (ESL) and lower equivalent series resistance (ESR) in a small package. The new symmetrical design reduces ESL to 1nH, which is half that of standard D-case sized devices, said AVX.

Low ESL enables a higher resonant frequency up to 500kHz (mirror D case), delivering more efficient filtering in DC/DC power switching converters. The new design also reduces the height of the tantalum capacitors from 4.3mm (E case) to 3.1mm (D case) with further reductions down to 2mm maximum height for the Y case.

The mirror TPM capacitors are available in a D-case size with a capacitance range of 220-1,000?F, and a voltage range of 2.5-10V. The capacitors provide an ESR range of 25-35m. Higher voltage (up to 35V and 50V) devices are under development. Capacitance values in the range of 10-22?F with ESR values of 65-140m on a single 35-50V capacitor are difficult to attain within the 3.1mm maximum height using any other technology, said AVX.

Complying with RoHS requirements, TPM capacitors are designed for 3x reflow, 260C peak temperature Pb-free assembly systems, and feature an operating temperature range of -55C and 125C.

The mirror anode configuration also enhances thermal power dissipation, enabling a higher ripple current to be achieved using only one capacitor, said AVX. This allows a reduction in the number of capacitors, providing a downsizing of the power supply without compromising the output current ratings.

Typical pricing starts at $2 each in quantities of 1,000.

Delivery is from stock to 14 weeks.

- Gina Roos
eeProductCenter




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