ALLPCB
BJT Structure and Operating Principles
Technical overview of bipolar junction transistors (BJT): structure, NPN/PNP configuration, current relationships, operating states, and implications for amplification and switching.
MOSFET vs IGBT: Key Differences
Comparison of MOSFET and IGBT power switches: structural differences, on-resistance, switching frequency limits, body diode behavior, and typical application use cases.
What Is an NTC Thermistor: Principle and Uses
Overview of NTC thermistor applications: oxide semiconductor temperature sensor whose resistance drops with rising temperature, used for thermal monitoring and control.
Understanding Bipolar Junction Transistors
Technical overview of bipolar junction transistor operation, structure, modes (cutoff, active, saturation), characteristic curves, and key parameters like current gain.
Metal Oxide Varistor (MOV) Aging and Protection Options
Technical overview of MOV aging mechanisms and protection strategies: parallel and series use with ceramic gas discharge tube (GDT) for improved surge protection and longevity.
Why GaN Is Seen as the Next Major Semiconductor
Technical overview of GaN advantages, the challenges of producing P-type GaN, and implications for device design, thermal scaling, and alternatives (SiC).
Understanding MOSFET Datasheet Parameters
Technical guide to reading a MOSFET datasheet, focusing on SOA curve interpretation, practical current limits (continuous and pulse), and relevance of switching parameters.
Power MOSFET UIS/UIL Behavior and Limits
Technical overview of MOSFET UIS avalanche ratings and SOA, covering Ipk vs tav behavior, thermal and die-volume limits, non-thermal failures, and repeated-avalanche effects.
SiC Power Device Interconnect Techniques
Review of SiC power device interconnects, covering planar, 3-D and hybrid techniques, impacts on parasitic inductance and thermal management, and key material/process challenges.
Why the Inductor Is the Hard Part in Buck Converters
Analysis of key components in a buck converter, focusing on why the inductor selection and inductance calculation pose the primary design challenge.