Solid-state LTD module using MOSFETs

It is proposed that linear transformer driver (LTD) concept can be applied to compact, repetitive pulsed-power generation. For experimental demonstration, a table-top LTD module has been constructed by using power MOSFETs and film capacitors. It consists of 24 basic circuits and a magnetic core, contained in a cavity case having a diameter of 33 cm and a height of 1 cm. All MOSFETs can be turned on and off synchronously, controlled by a single optic fiber. This LTD module has been tested with operation voltage of 900 V for single shot and 800 V for repetitive operation at 5 kHz, respectively. Near-rectangle waveforms were obtained on resistive load of ~3.2 Ω, with pulse width of ~60 ns, rise-time of ~20 ns, and fall time of ~40 ns. The overall system efficiency was obtained to be ~76%.