Solutions

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 onsemi 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, onsemi 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.

Block Diagram

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Evaluation/Development Kits

Gate Driver Ecosystem - Orderable

Gate Drivers Plug-and-Play Ecosystem

Ecosystem allows for the comparison of the dynamic performance and capabilities of different gate drivers.

Isolated Auxiliary Power - Orderable

15W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology

This is a highly efficient primary side regulated (PSR) auxiliary power supply targeting HEV and EV automotive applications.

40W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology

This is a highly efficient primary side regulated (PSR) auxiliary power supply targeting HEV and EV automotive applications.

Isolated Auxiliary Power - Orderable

6V to 18V Input Isolated IGBT Gate Driver Supply Using the NCV3064 Automotive Qualified Controller

This reference design enables a low component count, compact form factor and robust performance for an isolated gate driver supply for IGBTs.

6V to 18V Input Isolated SiC Gate Driver Supply Using the NCV3064 Automotive Qualified Controller

This reference design enables a low component count, compact form factor and robust performance for an isolated gate driver supply for SiC MOSFETs.

Reference Design

11kW 3-Phase On Board Charger (OBC) PFC-LLC Platform

The 11kW reference design is a 3-phase On Board Charger (OBC) platform achieving state-of-the-art system efficiency with automotive qualified SiC power devices and drivers.

6.6kW OBC Reference Design Using SiC

This 6.6kW OBC reference design demonstrates the usage of SiC MOSFET and SiC diode technology for the full power stage path (PFC, LLC and Secondary Rectification) providing higher power density than traditional Silicon devices.

6.6kW OBC Reference Design Using Totem Pole PFC

This 6.6kW OBC reference design demonstrates Totem Pole PFC in On Board Charging with a total system efficiency of 97% (typical).

3.3kW APM OBC Demo Board Test Report

This 3.3kW OBC reference design demonstrates using our Automotive Power Modules (APMs) to reduce system size and improve efficiencies of the PFC, LLC and Secondary Rectification.

15W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology

This is a highly efficient primary side regulated (PSR) auxiliary power supply targeting HEV and EV automotive applications.

40W High Voltage Auxiliary Power Supply for EV Using Primary Side Regulation (PSR) and SiC Technology

This is a highly efficient primary side regulated (PSR) auxiliary power supply targeting HEV and EV automotive applications.

6V to 18V Input Isolated IGBT Gate Driver Supply Using the NCV3064 Automotive Qualified Controller

This reference design enables a low component count, compact form factor and robust performance for an isolated gate driver supply for IGBTs.

6V to 18V Input Isolated SiC Gate Driver Supply Using the NCV3064 Automotive Qualified Controller

This reference design enables a low component count, compact form factor and robust performance for an isolated gate driver supply for SiC MOSFETs.

Technical Documents

On Board Charger (OBC) LLC Converter

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

On Board Charger (OBC) Three-Phase PFC Converter

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)

6.6 kW On Board EV Charger Reference Design

Overview of 6.6kW discrete solution using Super-Junction MOSFETs and Silicon Carbide (SiC) diodes with test results

Electric Vehicle OBC System Design and Simulation Using Power Modules

Simulation of OBC performance using Automotive Power Modules (APMs) instead of discrete components

3.3 KW On Board EV Charger (OBC) Design Note

Overview of 3.3kW discrete solution using Super-Junction MOSFETs and Silicon Carbide (SiC) diodes with test results

Videos