AN-4178 New High-Voltage SMD Package, Power88 for High- Efficiency, and Low-Profile Power Systems

One of effort to overcome the planar MOSFET’s limit is super-junction technology in high voltage power MOSFET. This technology can dramatically reduce both on-resistance and gate charge, which is usually a trade-off. With smaller parasitic capacitances, the super-junction MOSFETs have extremely fast switching characteristics and therefore reduced switching losses. Naturally fast switching behavior of a super-junction MOSFET leads to device stress, including voltage and current spikes, and greater dv/dt and di/dt, by self-inflicted voltage transients during switching transition time due to combination with the stray parasites in devices and printed circuit board. Power Quad Flat No-lead package, which is widely used in low voltage applications, is a surface mount package to achieve power density and small form factor requirements of many applications. The Power88 package is a new leadless SMD package for high voltage super-junction MOSFET. This package provides excellent switching performance thanks to lower parasitic source inductance and Kelvin source configuration.