75V tantalum stack polymer capacitor for GaN designs

August 06, 2020 //By Nick Flaherty
Kemet's TSP 7360-43 75V capacitor is aimed at high frequency designs using gallium nitride (GaN) devices
Kemet's TSP 7360-43 75V capacitor is aimed at high frequency designs using gallium nitride (GaN) devices

Kemet, now a subsidiary of Yageo in Taiwan, has launched a 75V surface mount Tantalum Stack Polymer (TSP) capacitor series suitable for designs using gallium nitrdie (GaN) transistors.

The 7360-43 is rated for 82μF and 75V in a Polymer Hermetically Sealed package.

The TSP series is designed to provide the highest capacitance/voltage (CV) ratings in surface mount device (SMD) capacitors with its stacking construction. The solid electrolytic capacitor has a conductive polymer cathode capable of delivering ultra low ESR and improved capacitance retention at high frequencies. This combines the low ESR of multilayer ceramic, the high capacitance of aluminum electrolytic, and the volumetric efficiency of tantalum into a single surface mount package. Unlike liquid electrolyte-based capacitors, KO-CAP has a long operational life and high ripple current capabilities.

The stacked capacitors are well suited and sized for use in high voltage power management applications such as buck boost converters, filtering, hold-up capacitors, and other high ripple current applications that require a small form factor, stable performance, and long operational lifespan.

Kemet's KO-CAP High Reliability Series T540, T541 and T543 are all available for stack configuration in the TSP series. When stacked, the capacitor designs allows engineers to customize for capacitance, voltage, and low ESR (equivalent series resistance). This makes the TSP series suitable for designs using GaN transistors such as radar applications based on the Active Electronically Scanned Array (AESA) systems. The TSP series also offers improved derating conditions and larger capacitance to ensure a low failure rate for typical voltage levels, as well as multiple failure rate options when utilizing Series T540 and T541 in a stack configuration.

The TSP series is qualified for numerous applications, including airborne, grounded, and naval equipment using GaN RF decvices.  AESA systems for radar and demand for lightweight devices for airborne systems are the main drivers of the GaN RF defense market, and the TSP capacitor series can fully support other high power, high frequency, and long-life requirement

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