Page 10 - PCIM and APEC 2021 - Technical Coverage, eBook

Semiconductors PCIM - AUTOMOTIVE

isolated high-current, high-efficiency IGBT driver (NCV57000DWR2G) and two high-performance
SiC MOSFETs (NVHL060N090SC1) in each high-speed leg. Additionally the low-speed leg uses two
650-V N-channel power MOSFET SUPERFET III (NVHL025N65S3) devices controlled by a monolithic

high- and low-side gate-driver IC (FAN7191_F085).

Ask the Expert: 48−V
Figure 5: 6.6-kW interleaved totem-pole PFC evaluation board

With these high-performance SiC MOSFETs configured in a totem-pole topology, the system
achieves 97% efficiency (typical). The design includes hardware overcurrent protection, hardware Automotive Electrical
overvoltage protection, and an auxiliary power distribution system (non-isolated) that can supply
every circuit on the PFC board and the control board without another DC source. Flexible control
interfaces are available to adapt to a variety of control boards. Systems Emerging

By Jay Nagle, senior engineer for the Power Solutions Group Division at
onsemi

Ever since auto manufacturers switched from a 6-V battery
to a 12-V battery in the mid-1950s, they have continued to
For More Information add more electrical and electronic equipment. All of these
new accessories have stretched most 12-V vehicle electrical
systems to their limit. The industry is responding by developing
▶ On Board Charger Three-phase PFC Converter a new, improved electrical system using a 48-V battery. The

more powerful 48-V systems are first showing up in new
▶ The Benefits of Using a SiC OBC vehicles called “mild hybrids.” Mild hybrid electric vehicles
(MHEVs) use a small internal combustion engine (ICE) and an
▶ Silicon Carbide (SiC) Solutions for Electrical Vehicles AC synchronous induction motor to power the vehicle. The
following discussion relates to those MHEVs. Figure 1: onsemi's Jay Nagle

16 SEPTEMBER 2021 | www.powerelectronicsnews.com SEPTEMBER 2021 | www.powerelectronicsnews.com 17