WPG Launches 6.6kW Electric Vehicle On-Board Charger Solution Based on Onsemi Products

WPG Holdings, a leading semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary WPI has launched a 6.6kW electric vehicle on-board charger solution (OBC) based on the ON Semiconductor FAN7191MX-F085 Gate Driver.

Figure 1 - Display board of WPG's 6.6kW electric vehicle onboard charger solution based on Onsemi products

In recent years, the global attention to the new energy industry has continued to increase. As more and more countries take "carbon neutrality" as an important development goal, electric vehicles and their upstream and downstream industries have ushered in a period of rapid growth. Among them, OBC (electric vehicle on-board charger), as a core component of electric vehicles, is constantly innovating in the direction of high power and high efficiency along with the vigorous development of new energy technologies. On the one hand, the OBC module can convert the AC power of the power grid into DC power to provide charging needs for the car. On the other hand, due to the gradual popularization of electric vehicles, the automotive OBC module can also be used as an energy storage battery to provide power supply needs for other electrical equipment. In line with this trend, WPG World Peace has launched a 6.6kW automotive OBC solution based on Onsemi products, which has high current and low output voltage drop characteristics, and can provide new energy vehicle users with efficient and safe charging and discharging experience.

Figure 2-Application scenario of WPG's 6.6kW electric vehicle onboard charger solution based on Onsemi products

This 6.6kW OBC solution consists of n-channel power MOSFET superet III NVHL025N65S3, monolithic high-side and low-side gate driver IC FAN7191_F085, high-speed high switching performance SiC MOSFET NVHL060N090SC1, and independent high current and high efficiency IGBT driver NCV57000DWR2G. Among them, FAN7191_F085 is a monolithic high-side and low-side gate driver IC that can drive high-speed MOSFETs and IGBTs with an operating voltage of up to +600V. It has a buffered output stage, and all NMOS transistors are designed with high pulse current drive capability and minimum overlap conduction capability. With onsemi's high-voltage process and common-mode noise elimination technology, the high-side driver can work stably in a high dv/dt noise environment. And the built-in advanced level conversion circuit can make the operating bias voltage of the high-side gate driver reach VS = -9.8V (typical value at VBS = 15V).

Figure 3 - Block diagram of WPG's 6.6kW electric vehicle onboard charger solution based on Onsemi products

By using these high-performance devices and totem pole topology, the system efficiency can reach 97% (typical value), and OCP and OVP hardware protection are also provided in the circuit to further ensure the high reliability of the system. In addition, the onboard auxiliary power supply system of the solution can provide power for the onboard and control board circuits without the need for an external DC power supply. At the same time, the solution can also provide a flexible control interface to adapt to different control boards.

Core technology advantages:

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• Floating channel enables bootstrap operation up to +600V;

• 4.5A/4.5A source current/sink current driving capability;

• Common mode dv/dt noise elimination circuit;

• Both channels have built-in undervoltage lockout function;

• Matched propagation delays for both channels;

• Compatible with 3.3V and 5V logic input levels;

• The output is in phase with the input;

• AEC-Q100 compliant.

Program Specifications:

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• Input voltage: 90 − 264Vac;

• Output power: 6.6kW;

• Topology: 3CH Interleave Totem Pole;

• I/O Isolation: None.