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Three-phase SiC MOSFET IPM focuses on e-mobility

Fri, Mar 06, 2020

For e-mobility applications, a three-phase SiC MOSFET intelligent power module (IPM) from Cissoid has been designed to improve time to market for electric vehicle (EV) OEMs.

The IPM technology includes a three-phase water-cooled SiC MOSFET module with built-in gate drivers. For OEMs and electric motor manufacturers willing to adopt SiC-based inverters for more efficient and compact motor drives, the IPM is claimed to optimise the electrical, mechanical and thermal design of the power module and its proximity control for automotive and industrial markets.

The first product in this scalable platform, a three-phase 1200V/450A SiC MOSFET IPM, features low conduction losses, with 3.25mOhms on resistance and low switching losses, with 8.3mJ turn-on and 11.2mJ turn-off energies at 600V/300A. It reduces losses by at least a factor three, says Cissoid, compared with the highest performing IGBT power modules. Cissoid’s module is water-cooled through a lightweight AlSiC pin-fin baseplate for a junction-to-fluid thermal resistance of 0.15°C/W. The power module is rated for junction temperature up to +175 degrees C. The IPM withstands isolation voltages up to 3,600V (50Hz, 60 seconds).

The built-in gate driver includes three on-board isolated power supplies (one per phase) delivering each up to 5W allowing it to easily drive the power module up to 25KHz and at ambient temperatures up to +125 degrees C. Peak gate current up to 10A and immunity to high dV/dt (>50KV/µs) enable fast switching of the power module and low switching losses. Protection functions include under-voltage lockout (UVLO), active Miller clamping (AMC), desaturation detection and soft shutdown (SSD).

Dave Hutton, CEO at Cissoid, believes: “With this new SiC intelligent power modules, which is the outcome of years of experience in the development of power modules and gate drivers for extreme temperature and voltage environments, we are happy to deliver our first IPM samples to early SiC adopters and to support the automotive industry in its transition towards highly efficient e-mobility solutions.”

http://www.cissoid.com

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Flat connectors withstand higher operating temperatures

Thu, Mar 05, 2020

Flat flexible cable/flat printed circuit (FFC/FPC) connectors from Hirose Electric can withstand higher operating temperatures than standard FFC/FPC connectors. The FH67 series withstand temperatures ranging from -55 to +125 degrees C. This heat resistance capability enables the connector to be used in harsh automotive environments.

The FH67 0.5mm pitch connectors are characterised by a single action lock and a vertical connection design.

The robust FFC/FPC connectors’ one-action lock allows an FFC/FPC to be inserted into the connector without opening the actuator. This can be done with one hand or by automated machinery, says Hirose, saving valuable assembly time and reducing the rates of mating failure. Removing the connector is also easy and can be done by one hand or by robot.

The FH67 series is reliable with an independent two-point spring contact design, which includes a wiping element that reduces contact failure due to dust intrusion.

The ground contacts allow a shielded FFC to be used which prevents EMI. The FH67 series has a height of just 5.2mm, making it suitable for space-constrained design for use in automotive equipment, smart home devices, medical equipment and other portable devices.

Hirose Electric is a Japanese manufacturer of high-quality connectors. It was established in 1937 and uses advanced engineering services, customer service and worldwide manufacturing capabilities to provide technically advanced connector products for many industries including industrial, automotive, consumer, testing, broadcasting, and telecommunications.

Hirose established European offices over 30 years ago to compete internationally in Europe. In 2010, the European offices were merged together to form Hirose Electric Europe. The European headquarters is based in Amsterdam, The Netherlands. Other European branches are located in Germany, UK, France and Italy.

http://www.hirose.com/eu

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Lattice supports embedded vision with solutions stack

Mon, Mar 02, 2020

To accelerate low power, embedded vision development such as image sensor bridging, aggregation, splitting and processing, Lattice Semiconductor has introduced the mVision solutions stack with support for the Nexus platform and CrossLink-NX FPGAs.

It includes the modular hardware development boards, design software, embedded vision IP portfolio, reference designs and demos needed to implement sensor bridging, sensor aggregation, and image processing applications found in machine vision, advanced driver assistance systems (ADAS), drones and augmented reality / virtual reality (AR/VR) for the industrial, automotive, consumer, smart home and medical markets.

Initially used in manufacturing, today embedded vision is used in automated assembly and inventory, explained Jeff Bier, founder of the Edge AI and Vision Alliance. “Many of these applications demand small, low cost, low power solutions,” he continued, adding “Solutions stacks, such as sensAI and mVision . . . help developers more easily integrate smart vision capabilities into their product designs.”

Key features of the Lattice mVision solutions stack are the Video Interface Platform (VIP) modular hardware development boards with support for a variety of video and I/O interfaces commonly used in embedded vision applications (including MIPI, LVDS, DisplayPort, HDMI, USB, and others). The VIP development boards currently support Lattice FPGAs including CrossLink, ECP5 and CrossLink-NX, based on the Lattice Nexus platform.

There is also a comprehensive IP Library. The Lattice mVision solutions stack includes ready-to-implement IP cores for interfacing to MIPI and LVDS image sensors, image signal processing pipelines, common connectivity standards like USB and Gigabit Ethernet, and display standards such as HDMI, DisplayPort, and GigE Vision.

The stack supports both of Lattice’s FPGA design tools, Lattice Diamond and Lattice Radiant. The tools automate many common design tasks.

There are also complete reference designs for common embedded vision applications including sensor bridging, sensor aggregation and image processing.

Customers can also access a network of design service partners, developed by Lattice, for support ranging from developing individual functional design blocks to complete turn-key solutions.

http://www.latticesemi.com/mvision

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Microcontroller with built-in PUF tech offers multiple layers of security

Fri, Feb 28, 2020

The MAX32520 ChipDNATM secure Arm Cortex-M4 microcontroller from Maxim Integrated Products is a secure microcontroller with built-in physically unclonable function (PUF) technology for financial- and government-grade security. The technology allows for multiple layers of protection to provide advanced key-protection technology for use in Internet of Things (IoT), health care, industrial and computing systems.

The MAX32520 with ChipDNA offers multiple layers of protection through its PUF technology, a key-protection technology for safeguarding secrets used in cryptographic operations. It uses a tamper-proof PUF key for flash encryption, secure boot for root-of-trust and serial flash emulation. Additionally, the physical security inherent in the PUF key eliminates the need for a battery to actively destroy secret-key materials when under attack. Until now, the most-sensitive applications have always required a battery to provide this highest level of secret-key protection.

The secret keys generated by the ChipDNA PUF circuitry are resistant to physical attacks, ensuring the keys that protect data and systems are out of the reach of attackers. Flash-encryption using PUF protects sensitive information with encryption keys that can withstand advanced physical inspection and prying, as well as providing robust IP security. The DeepCover secure microcontroller can protect all user data, as it is equipped with SP 800-90A and SP 800-90B compliant TRNG and hardware accelerators for AES-256, ECDSA P-521 and SHA-512.

Delivering up to 2MB of secure flash memory means advanced applications can run in a highly secure environment. Built on an advanced process node, this secure microcontroller provides advanced security features, a 120 MHz ARM Cortex M4 processor and plenty of memory. It eliminates several components like a battery, a tamper monitor IC and system management micros that are often found in security-sensitive applications.

“Enabling developers to incorporate PUF-encrypted flash and secure boot loading without system redesign or in-house code development will help them reduce time-to-market dramatically,” said Tanner Johnson, senior analyst, IoT cybersecurity at Omdia.

Kris Ardis, executive director, micros, security and software business unit at Maxim Integrated said: “The threats to IoT systems are getting more advanced all the time, and tools to attack systems move from the realm of academia to the realm of open source every day. MAX32520 with ChipDNA is a step forward.”

http://www.maximintegrated.com

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Three-phase SiC MOSFET IPM focuses on e-mobility

Flat connectors withstand higher operating temperatures

Lattice supports embedded vision with solutions stack

Microcontroller with built-in PUF tech offers multiple layers of security

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