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Scalable 7–22 kW OBC Solutions

Discover power electronics that enable charging EVs at home with OBC solutions. Comprehensive guide with development advice and product recommendations focused on OBC design and architectures.

Overview

On Board Charger (OBC) is used to charge the high voltage battery pack of Battery Electric Vehicles (BEV) and Plugin Hybrid Electric Vehicles (PHEV). It is integrated directly into the vehicle's design and enables the conversion of AC power from the grid into DC power suitable for the vehicle's battery pack. This technology allows EV owners to conveniently recharge their vehicles at home or at public charging stations.

The best in class automotive power semiconductors, including EliteSiC MOSFETs, EliteSiC diodes, silicon Super-Junction (SJ) MOSFETs, hybrid IGBTs, and Automotive Power Modules (APMs), enable customers to maximize power density, efficiency, and reliability for their 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. Galvanically isolated gate drivers can be paired with any power switch and chosen topology for PFC and DC/DC power stages. onsemi designed specialized gate drivers to complement EliteSiC MOSFET range and ensure optimized efficiency and reliability for high-power OBC.

Products

Silicon Carbide (SiC) MOSFETs

Our SiC MOSFETs are designed to be fast and rugged and include system benefits from high efficiency to reduced system size and cost. MOSFETs are metal–oxide–semiconductor field-effect transistors with insulated gates. These silicon carbide MOSFETs have a higher blocking voltage and higher thermal conductivity than silicon MOSFETs, despite having similar design elements. SiC power devices also have a lower state resistance and 10 times the breakdown strength of regular silicon. In general, Systems with SiC MOSFETs have better performance and increased efficiency when compared to MOSFETs made with silicon material.

There are many advantages to choosing SiC MOSFETs over silicon MOSFETs, such as higher switching frequencies. High-temperature development is also not a concern when using SiC MOSFET modules because these devices can operate efficiently even in high heat. Additionally, with SiC MOSFETs, you benefit from a more compact product size because all components (inductors, filters, etc.) are smaller.

Silicon Carbide (SiC) Modules

SiC Modules contain SiC MOSFETs and SiC diodes. The boost modules are used in the DC-DC stages of solar inverters. These modules use SiC MOSFETs and SiC diodes with voltage ratings of 1200V.

A Silicon Carbide (SiC) Module is a power module that operates with Silicon Carbide semiconductors for its switch. The purpose of a SiC power module is the transformation of electrical power through switches to improve system efficiency.

The primary function of SiC Modules is to transform electrical power. Silicon Carbide offers an advantage over silicon because, with less resistance to move away from the source (due to increased efficiency), SiC devices can operate at a higher switching frequency. A SiC based system is also more compact and lightweight than a silicon solution, allowing for smaller designs. Therefore, SiC devices are the ideal solution for situations where you want to increase efficiency and improve your thermal management.

Gate Drivers
GaN, IGBT, FET, MOSFET, H-Bridge MOSFET, and SiC MOSFET inverting and non-inverting drivers ideal for switching applications.
MOSFET Modules
MOSFET Modules are used for automotive motor drive and on-board charger applications. They come in 40 V, 60 V, 80 V and 650 V ratings with superjunction technology and sense resistor. Aside from the six-pack and the full and half bridge topology, they are also available in the totem pole PFC topology.
IGBTs
Insulated Gate Bipolar Transistors (IGBTs) that offer maximum reliability in high performance power conversion applications.
Ethernet Controllers
NCV7410
Ethernet Controller, 10 Mb/s, Single-Pair, MAC + PHY, 802.3cg, 10BASE−T1S Compliant
ESD Protection Diodes
Protection diodes and arrays that are specifically designed to provide ESD and surge protection.
Current Sense Amplifiers
Current sensing requires accurate measurements and onsemi’s current sense amplifiers offer high degree of precision current sensing along with the advantages of wide input common mode range, bidirectional current sensing and high/low side current sensing.
High Voltage MOSFETs
Portfolio of high voltage super-junction (SJ) MOSFETs meant for general usage and for several applications such as Power Factor correction, server/telecom power, led lighting.
Linear Regulators (LDO)
A portfolio that provides optimum solution for low power, space conscious and low noise designs.
EEPROM Memory
Serial EEPROM memory, with I2C, SPI, or MicroWire interfaces.

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Documents

White Papers
onsemi EliteSiC M3S Technology for High-Speed Switching Applications
Application Notes
onsemi EliteSiC Gen 2 1200 V SiC MOSFET M3S Series
White Papers
High Temperature Analog and Mixed‐Signal Solutions Enabled by the Treo Platform
Application Notes
Practical Design Guidelines on the Usage of an Isolated Gate Driver
White Papers
onsemi EliteSiC 650 V SiC MOSFET M3S Series with Superior Switching Performance
Application Notes
Top Cool Package for Power Discrete MOSFETs
Application Notes
Introduction to 1200 V SiC MOSFET Modules for On-Board Charger Applications: NVXK2KR80WDT, NVXK2TR80WDT, & NVXK2TR40WDT

Evaluation Boards/Kits

Evaluation Board
EVBUM2897G-EVB
Evaluation Kit
EVBUM2909G-EVK
Evaluation Board
EVBUM2878G-EVB
Evaluation Board
NCP-NCV51152TO2474LGEVB
Evaluation Board
NCP-NCV51561TO2474LGEVB
Evaluation Board
NCP-NCV51563D2PAK7LGEVB

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