On Board Charging
Best in class automotive power semiconductors including Silicon Carbide (SiC) MOSFETs, SiC diodes, silicon Super-Junction (SJ) MOSFETs, hybrid IGBTs, and Automotive Power Modules (APMs), enable customers to maximize power density, efficiency and reliability for their On Board Charger (OBC) designs. Customers can design OBC power stages that address 3.3 kW up to 22 kW and battery voltages up to 800 V using ON Semiconductor solutions.
Plugin Hybrid Electric Vehicles (PHEV), Battery Electric Vehicles (BEV), and Fuel Cell Electric Vehicles (FCEV) use OBC modules to charge the high voltage battery pack. The term 'New Energy Vehicle (NEV)' encompasses all 3 types mentioned above (PHEV, BEV, FCEV). The high-level function of the OBC is to convert an AC voltage input to a DC voltage output with the appropriate output current and voltage level for the battery pack to charge. While many OBC implementations are unidirectional (grid-to-vehicle), there is a movement to provide bidirectional capability allowing grid-to-vehicle and vehicle-to-grid charging with BEVs.
These “On Board” Charger modules, located on the vehicle as the name suggests, have air or liquid cooling to help with thermal management due to the power levels. Depending on the architecture, the OBC output may need to operate down to less than 250 VDC and operate at 800 VDC or higher when charging the main vehicle battery pack.
Whether it is Power Factor Correction (PFC), primary side DCDC, or secondary rectification, ON Semiconductor provides the best solution to address your system requirements. Our premier automotive product portfolio for OBC covers SiC MOSFETs, SiC diodes, APMs, MOSFETs, IGBTs, gate drivers, In-Vehicle Networking (LIN, CAN, CAN-FD), analog signal chain (OpAmps, current shunt amplifiers, comparators), power supply ICs, System Basis Chips (SBCs) and silicon diodes.
OBC Reference Designs
Isolated Auxiliary Power Reference Designs
SECO-HVDCDC1362-15W15V-GEVB: 15W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology
SECO-HVDCDC1362-40W15V-GEVB: 40W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology
Isolated Gate Driver Power Reference Designs
SECO-LVDCDC3064-IGBT-GEVB: 6V to 18V Input Isolated IGBT Gate Driver Supply Using the NCV3064 Automotive Qualified Controller
SECO-LVDCDC3064-SIC-GEVB: 6V to 18V Input Isolated SiC Gate Driver Supply Using the NCV3064 Automotive Qualified Controller
Silicon Carbide (SiC) Products for 400V & 800V OBC Systems
Silicon Products for 400V & 800V OBC Systems
Gate Drivers & Gate Drive Power Supplies for OBC Systems
Resonant Controllers, Power Supplies and In-Vehicle Networking for OBC Systems
Analog Signal Chain for OBC Systems
Design overview, simulation data and bench data using Silicon Carbide MOSFETs with NCV51705 SiC gate drivers for the primary side LLC and SiC diodes for the secondary rectification
Design overview and bench data using Silicon Carbide MOSFETs with NCV51705 SiC gate drivers in a 3 leg bridge configuration for Power Factor Correction (PFC)
Overview of 6.6kW discrete solution using Super-Junction MOSFETs and Silicon Carbide (SiC) diodes with test results
Simulation of OBC performance using Automotive Power Modules (APMs) instead of discrete components
Overview of 3.3kW discrete solution using Super-Junction MOSFETs and Silicon Carbide (SiC) diodes with test results