On-Board Chargers (OBC)

On-board chargers are essential components of electric vehicle power systems, providing the capability for safe and automatic charging of electric vehicle traction batteries.

They are generally divided into unidirectional on-board chargers, bidirectional on-board chargers, and integrated on-board chargers.

With the rapid development of the new energy vehicle industry, charging safety and technology have become increasingly important. Discrete high-voltage components have been widely used in the field of on-board chargers (OBC). Due to their cost advantages, more and more module-based solutions are being replaced by discrete high-voltage components. This not only improves the cost-effectiveness of the products but also brings about more efficient and compact design concepts.

Super Junction MOSFETs

Super Junction MOSFETs are currently the best choice for performance, cost, and efficiency considerations in medium- to low-voltage OBC and DC-DC power supply solutions.

They are important new types of components introduced after the electrification of automobiles and are mainly used in DC-DC power supplies and OBCs. In general, in new energy vehicles, more than 16 SJ MOSFETs can be used in the on-board charger section.

New Series of SJ MOSFETs Launched by VBsemi

VBsemi has launched a new series of SJ MOSFETs, which are multi-layer epitaxial super junction MOSFET products. By optimizing the device structure design and adopting more advanced process manufacturing technology, the performance of the products has been further improved.

This series has outstanding avalanche ruggedness, greatly enhancing the reliability and stability of the devices.

In OBC applications, it can achieve higher power conversion efficiency, lower losses, and smaller size, meeting the requirements of electric vehicles for on-board chargers (OBC) and providing more choices.

Advantages of SJ MOSFETs Launched by VBsemi

• High Efficiency

Ultra-low on-resistance and Qg values enable the devices to maintain high efficiency under light load and full load conditions, significantly reducing conduction and switching losses.

• Low Temperature Rise

The low power consumption characteristics effectively reduce the overall operating temperature of the power supply, thereby extending the service life of the power supply.

• Low On-Resistance

The devices have excellent on-resistance performance, with the on-resistance being only half or more of that of traditional MOS devices under the same chip area.

• Excellent Stability

Strong EAS impact resistance provides protection for the power supply, with internal defects in the chip far lower than low-cost trench process products, greatly improving high-temperature stability.

• Compact Size

While meeting the requirements of the same voltage and current, the chip area of SJ MOSFETs can be made smaller than that of traditional MOS, achieving a more compact package design.

• Wide Application Range

Widely used in various markets, including consumer-grade, industrial-grade, and automotive-grade applications.

VBsemi SJ MOSFET Products