A Bipolar Smart Power Technology for High Voltage Applications

A SiGe Heterostructure Bipolar Transistor for High Voltage Power Switching Applications

Study and analysis of a proposed high-voltage high current switching n-p-n silicon germanium single-heterojunction bipolar transistor (SHBT) is performed using 2D MEDICI device simulator. A theoretical formulation is provided to substantiate the simulation results obtained regarding quasi-saturation phenomenon in bipolar transistors. Comparison with the conventional high-voltage current switchi...

Filtering Power Divider/Combiner Based on Half Mode Substrate Integrated Waveguide (HMSIW) Technology for High Power Applications

A filtering power divider/power combiner based on half mode substrate integrated waveguide technology for high power applications is proposed. This design includes one half mode substrate integrated waveguide cavity, one matched load, and four sections of quarter-wavelength transmission lines. The high isolation between output ports is obtained by combining the half mode substrate integrated wa...

Promise and Challenges of High-Voltage SiC Bipolar Power Devices

Although various silicon carbide (SiC) power devices with very high blocking voltages over 10 kV have been demonstrated, basic issues associated with the device operation are still not well understood. In this paper, the promise and limitations of high-voltage SiC bipolar devices are presented, taking account of the injection-level dependence of carrier lifetimes. It is shown that the major lim...

High Voltage Direct Current Transmission – Proven Technology for Power Exchange

A High Efficiency Low-Voltage Soft Switching DC–DC Converter for Portable Applications

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...