China Drives Growth in the Global IGBT Market

The Insulated Gate Bipolar Transistor (IGBT) is widely recognized as one of the most important power semiconductor devices in modern electronics. Often referred to as the "CPU" of power electronics, IGBT technology plays a critical role in applications ranging from household appliances and industrial automation to railway transportation, renewable energy systems, electric vehicles (EVs), and smart grid infrastructure.

China has emerged as one of the largest markets for IGBT products, with demand growing rapidly over the past several years. Industry estimates indicate that China's IGBT market has expanded at an annual growth rate of approximately 15%, accounting for nearly one-third of global demand. This growth is being driven by increasing investments in electric vehicles, renewable energy projects, industrial automation, and energy-efficient technologies.

A significant portion of China's IGBT demand comes from the new energy vehicle sector. The rapid growth of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) has created substantial demand for IGBT modules used in traction inverters, motor control systems, onboard chargers, and charging infrastructure. Industry projections suggest that continued expansion of the EV market will further strengthen demand for advanced power semiconductors.

Supported by strong market demand and government initiatives, Shanghai-based HHGrace has actively expanded its IGBT manufacturing capabilities and product portfolio. The company has developed IGBT technologies for commercial, industrial, and consumer applications, helping strengthen China's domestic semiconductor ecosystem.

IGBT modules represent a significant portion of the cost structure in electric vehicles and charging stations, making them a critical component in the transition toward clean transportation and sustainable energy systems. As demand continues to grow for EVs, industrial automation, renewable energy systems, railway traction equipment, and smart power infrastructure, China's IGBT market is expected to remain a major driver of growth in the global power semiconductor industry.

Complete IGBT Gate Drivers for Power Electronics Applications

Power Integrations has developed the SCALE-2 family of IGBT gate drivers, providing a complete solution that integrates galvanic isolation, protection features, and DC/DC power conversion into a single compact module. These advanced gate driver solutions are designed for IGBT modules, power MOSFETs, and emerging wide-bandgap semiconductor technologies such as silicon carbide (SiC) devices operating at switching frequencies up to 500 kHz.

The SCALE-2 IGBT gate driver platform is based on an advanced ASIC chipset that combines the functionality of a dual-channel gate driver core. The architecture includes a primary-side logic-to-driver interface and a secondary-side intelligent gate driver, enabling efficient and reliable control of high-power semiconductor devices.

These gate driver modules are available for applications with blocking voltage ratings ranging from 600V to 6,500V and provide drive power capabilities from 1W to 20W per channel. To optimize switching performance, the modules incorporate separate gate resistors that allow independent control of turn-on and turn-off functions when driving external N-channel DMOS devices.

Single-channel and dual-channel versions are available, providing flexibility for a wide range of power electronics designs. The integrated protection and isolation features help improve system reliability while reducing design complexity and component count.

SCALE-2 gate drivers are widely used in industrial automation, motor control systems, power transmission equipment, railway traction systems, solar inverters, wind energy converters, electric vehicle power electronics, and other high-performance energy conversion applications. As demand for efficient power semiconductor solutions continues to grow, advanced IGBT gate drivers remain essential for improving switching performance, system reliability, and energy efficiency in modern power electronics systems.

IGBTs and Solar Inverters

IGBTs are excellent choices for use in solar inverters where voltage from a solar panel array on a residential or commercial building is converted from direct current to alternating current at a specific voltage output and frequency. IGBTs, like MOSFETS, use voltage rather than current as a means of control, with current applied across their gates being typically very low.

IGBTs are a type of bipolar junction transistor or BJT which have a semiconductor gate structure composed of metal oxide. BJTs have a higher current capability compared to MOSFETs. The speed at which an IGBT turns off is determined by how rapid the minority carrier recombines. The turn off time has an inverse relationship with the voltage drop or VCEON. This means that IGBTs with inherently rapid turn off times have a higher voltage drop and vice versa. Ultra fast IGBTs do switch off much faster than standard IGBTs, even if the IGBTs have the same dimensions and are basically manufactured the same way. The exact combination of speed and voltage drop is determined by adjusting the minority carrier recombination rate this in turn controls the turn off time.

Four switches are typically employed in a solar inverter. Two of the switches are high side IGBTs, while the other two are low side IGBTs. Solar inverters of this type produce a sinusoidal wave form and single phase alternating current. The frequency and voltage depend on the specific use required. In a household solar array system, the inverter will normally deliver voltage and frequency similar or the same as that provided by the mains electricity provider as it will be used to power household appliances that are designed to use mains power.

Inverters for installation in a residential capacity are usually linked to the power grid. These installations usually provide power to the grid when there is a surplus with tariff benefits depending on the location and provider. To enable this feature, the solar inverter is required to pulse width modulate the IGBTs above 20kHZ. The modulation frequency is normally around 50 to 60 Hz. This sort of pulse width modulation means that the two outut indicators can be maintained relatively small in size and they will also have the benefit of suppressing harmonics effectively.

This sort of solar inverter has switching speeds much higher than can be heard by the human ear so they remain basically noiseless.

To keep the power dissipation as low as possible, pulse width modulation is restricted to the two high side IGBTs while the low side IGBTs are commutated at 50 to 60kHz.