Power Management discrete capacitor-based voltage hold-up circuit employs a bank of tantalum capacitors connected in parallel, and this application report introduces a short protection method of tantalum capacitors for high- reliability applications where a tantalum capacitor failing as short circuit will disrupt overall system performance.
Capacitors exhibit exceptional power density, a vast operational temperature range, remarkable reliability, lightweight construction, and high efficiency, making them extensively utilized in the realm of energy storage. There exist two primary categories of energy storage capacitors: dielectric capacitors and supercapacitors.
Capacitors possess higher charging/discharging rates and faster response times compared with other energy storage technologies, effectively addressing issues related to discontinuous and uncontrollable renewable energy sources like wind and solar .
By having the tantalum capacitor short-circuited, the voltage thereof is zero, so that this element is not operational in the circuit. Figure 2 shows the simplified application circuit using CSD16327Q3, and 10 CSD16327Q3s from M1 to M10 are used for protecting each capacitor rail from C1 to C10.
These tantalum capacitors provide a higher temperature operating range with respect to super capacitors, and as a result of this reason, a discrete tantalum capacitor based hold-up circuit is more able to meet the demands of enterprise SSD environments. Figure 1. Simplified Application Circuit for the Hold-up Function
In comparison to batteries, supercapacitors exhibit a superior power density and the ability to rapidly store or discharge energy . Nevertheless, their energy density is lower due to the constraints associated with electrode surface charge storage.