Today’s EV market is growing and with it comes an increased demand for improved EV performance. What this means for designers
and OEMs alike is a need for reduced time-to-market while prioritizing efficiency and end-user experience. A major challenge in
this regard is finding the right solutions for the development of a wide range of applications including EV traction inverters.
The NXP S32K39 MCU series, a new
addition to our S32K family, is set to be
launched to provide much-needed leverage.
S32K39 MCUs Are Made for Electric Vehicle Traction Inverters
Lots of consideration goes into ensuring the highest possible EV performance including handling battery management, efficient
motor drive, fast charging and load balancing across entire grids. Our extensive
have been offering efficient control throughout the whole ecosystem and the soon-to-be-launched S32K39 will follow the same
The S32K39 MCU series is a specialized device designed to meet the demands of controlling the traction inverter in EVs. It
offers an impressive array of features, including strong performance, extensive integration, reliable networking, advanced
security and functional safety capabilities. This is essential because traction inverters play a vital role in how EVs
function, the performance of EV batteries and ultimately the driver’s experience.
The versatility of the MCUs also makes them suitable for addressing a wide range of EV applications beyond traction inverter
control to include
battery management (BMS), onboard
charging (OBC) and DC/DC conversion. Their security and functional safety capabilities exceed those of traditional automotive
MCUs, and their support for hardware isolation, time-sensitive networking (TSN) and advanced cryptography makes them compatible with
zonal vehicle E/E architectures
and software-defined vehicles.
Features that Make the S32K39 Optimized for Automotive Inverters
The S32K39 MCUs are a member of the high-performing S32K family. Enabled by key features, the S32K39 MCUs are designed to handle
two traction inverters. They are optimized with four 320MHz Arm® Cortex®-M7 cores arranged in a lockstep pair, two split-lock
cores, two motor control coprocessors and a digital signal processor (DSP). These devices are capable of supporting two 200 kHz
control loops that work with IGBTs as well as SiC and GaN power switches to enhance energy efficiency and achieve higher
switching frequencies. This results in reduced motor size, weight and cost, and extends the driving range. In addition, they
have up to 6 MB in-built flash memory and 800 KB of SRAM. The MCUs were developed with certified ISO/SAE 21434 cybersecurity and
ISO 26262 functional safety processes.
NXP is committed to helping designers achieve system-level functional safety design and meet standards compliance.
Read how we can help you enable your
functional safety applications.
The S32K39’s integrated hardware security engine (HSE) facilitates trusted boot, security services and secure over-the-air
(OTA) updates using public key infrastructure (PKI) and key management. It also has two motor control coprocessors and NanoEdge™
high-resolution pulse-width modulation (PWM) for higher performance and precision control. For resolver excitation, their
multi-channel analog support comes with SAR and sigma-delta A/D converters, as well as comparators and sine wave generators. The
S32K39's analog integration and support for a secure software resolver ensures cost savings by eliminating external components
such as discrete components and resolver-to-digital converters.
S32K39 Block Diagram
For better experience, download the
Get the head start you need in developing your EV traction inverter applications. Learn more about the key
features of S32K39.
S32K39 MCUs Are Used in EV Traction Inverters
S32K39 MCUs support traditional insulated-gate bipolar transistors (IGBT), as well as newer silicon carbide (SiC) and gallium
nitride (GaN) technologies. They can operate independently and manage up to two drive converters. Furthermore, they can also
function as remote intelligent actuators via TSN to drive three or four motors. When combined with
NXP's S32E real-time processor, they can serve as a control center for the electric vehicle propulsion domain and control two additional propulsion
inverters. This capability especially benefits car manufacturers seeking to enhance their vehicle's performance and handling by
supporting up to four electric motors.
Dual Traction Inverter Control Pedestal Demo
When used in combination with the
NXP FS26 Safety System Base Chip (SBC)
and NXP GD3162 high-voltage isolated gate drivers, an S32K39 MCU can serve as a dual traction converter solution for ASIL D applications. The
FS26 SBC supplies system power and ensures isolated security monitoring, while the GD3162 gate driver offers adjustable dynamic
gate strength to adapt to driving conditions and PWM dead-time enforcement to reduce switching losses and increase efficiency.
Additionally, there are error protection mechanisms that can respond quickly.
Pairing the S32K39 with Gate Drivers and SBCs
Lead customers now have access to engineering samples, evaluation boards and a comprehensive range of software support and
tools. These are designed to work with the S32K39 MCUs, which can be paired with the NXP
FS26 SBC and the advanced high voltage isolated gate
driver GD3162, offering adjustable dynamic gate strength control for a safe inverter control system. Together, they support the highest level
of functional safety (ASIL D) for traction inverter development. The plan is to release the product for production in early
For more information about the S32K39 MCU series and its availability,
please contact our distributors near you.