Design and manufacture semiconductor products - HXSEMI

How to Better Characterize SiC MOS Dynamic Performance Using Double Pulse Testing

Thu, 16 Apr 2026 01:10:13 -0700

Introduction

With the rapid evolution of silicon carbide (SiC) MOSFET technology, its high-frequency switching advantages over traditional Si IGBTs have attracted increasing attention from engineers.This advantage primarily stems from the high electron saturation drift velocity of SiC MOS devices, enabling rapid transitions between on and off states, significantly reducing switching time.

At the same time, as a unipolar device, SiC MOSFETs exhibit no minority carrier storage during freewheeling, unlike bipolar Si IGBTs. This results in dramatically lower reverse recovery losses. In fact, the reverse recovery charge (Qrr) of SiC MOS is typically only about one-tenth that of comparable silicon devices.

One corner of the HXSEMI laboratory

In many applications, such as: motor drives, Read More

IGBT Solutions for Photovoltaic (PV) Inverters

Thu, 09 Apr 2026 01:41:19 -0700

Driven by carbon neutrality goals and the global energy transition, solar power has become a key pillar of clean energy generation. At the heart of every PV system, the inverter converts DC power from solar panels into grid-compliant AC.
It also enables system monitoring, protection, and communication functions.Within the inverter, the Insulated Gate Bipolar Transistor (IGBT) is the core device for power conversion.
It must deliver high efficiency while withstanding current surges and thermal stress under demanding operating conditions. This places strict requirements on device performance and long-term reliability.

01. The Role of IGBTs in PV Inverters

1.1 High-Efficiency Power Switching

IGBTs act as the main switching devices in PV inverters. They are driven by high-speed PWM signals generated by DSP or CPU controllers. The gate driver circuit amplifies signals and provides electrical isolation for noise immunity.

1.2 Overcurrent and Short-Circuit Protection

Load transients or faults can cause...Read More

Working Principles and Applications of IGBT in Medium-Frequency Power Supplies

Wed, 08 Apr 2026 02:47:58 -0700

Medium-frequency power supplies are widely used across industrial manufacturing, medical equipment, and scientific research. At the heart of these systems lies the IGBT (Insulated Gate Bipolar Transistor), a critical power semiconductor device that plays a decisive role in system performance and reliability.

In this article, HXIPMSEMI provides an in-depth analysis of the working principles of IGBTs in medium-frequency power supplies, their key functions, as well as common failure modes and practical solutions.

1. Working Principle of IGBT in Medium-Frequency Power Supplies

In medium-frequency power systems, IGBTs primarily operate in switching mode.

When a positive voltage is applied to the gate, a conductive channel forms inside the IGBT, allowing electrons to flow from the emitter to the collector. At this point, the IGBT is in the on-state, enabling current to pass efficiently—much like opening a clear pathway for energy transmission.

Conversely, when the gate voltage is removed or reversed, the conductive channel disappears, and the IGBT enters the off-state, blocking current flow entirely—effectively cutting off the energy path.

By precisely controlling the gate voltage, engineers can accurately switch the IGBT on and off, thereby regulating the output voltage and current of the...Read More

Insulation Characteristics and Differences of IGBT Chip Substrates

Wed, 01 Apr 2026 02:29:46 -0700

I. Fundamentals of Insulation Materials in Semiconductor Modules

In high-power semiconductor devices such as IGBTs and IPMs (Intelligent Power Modules), the materials used to electrically isolate live circuits from the module baseplate are collectively referred to as insulation materials.

Insulation performance directly determines the module’s voltage withstand capability, operational stability, and service life, making it a critical parameter that cannot be overlooked in power semiconductor design.

Catalogue

Key Applications of AI in Power Cycling Test Systems
Practical Case: AI-Based Defect Detection Using C#
Challenges and Future Outlook
Conclusion

Keyword

PCT, Semiconductor Power Cycling Testing, IEEE reports, Artificial Intelligence, AI, Intelligent Defect Detection, Dynamic Test Optimization, SHYSEMI

With the rapid advancement of artificial intelligence, semiconductor power cycling testing (PCT)—a critical method for evaluating the reliability and lifetime of power devices...Read More

The IGBT driver circuit composed of discrete components

Wed, 07 Jan 2026 00:00:51 -0800

A typical discrete driver circuit's core task is: to receive weak signals from the control chip (such as MCU, PWM chip), and amplify them into a current source and current sink that can quickly and powerfully drive the gate of the IGBT. The main design considerations are similar to those of integrated circuit drivers, but all functions need to be implemented using discrete components:

Providing sufficient driving current: to achieve rapid charging and discharging of the IGBT gate capacitance (Cge, Cgc), shortening the switching time and reducing switching losses.
Providing appropriate driving voltage: typically +15V ±10% for turn-on and -5V to -15V for turn-off. Negative voltage turn-off can enhance anti-interference ability and prevent Miller capacitance effect-induced misconduction.
Achieving fast switching speed: requiring the push-pull output stage to have very low output impedance.
Necessary protection functions: such as gate resistor selection, gate clamping, active Miller clamping, etc. (more complex protections such as saturation detection are very difficult to...Read More

Pure Moments of Joy: The Meaning Behind HXSEMI's Birthday Celebrations

Mon, 05 Jan 2026 22:57:11 -0800

At HXSEMI, there’s one afternoon each month when our meeting rooms transform completely—no project timelines, no technical debates, no open issue lists. Just the sweet aroma of cake, the sound of shared laughter, and colleagues who, for a little while, set aside their titles as “chip engineers” or “process specialists” to simply enjoy being together.

Why We Need Gatherings That Aren’t About Work

The semiconductor industry is demanding. From wafer inspection to chip packaging, circuit design to yield optimization, our days are filled with precision and technical challenges. That’s exactly why we need a dedicated space for genuine downtime—a moment truly about life, about each other, and about pure, lighthearted joy.

Our birthday celebrations give that space tangible form. Here:

We don’t discuss the product application plans—we compete to see who can blow out candles the fastest.
We don’t analyze chip fabrication processes—we share recommendations for great movies we’ve seen recently.
We don’t Read More