ICs & Semiconductors Archives - Page 119 of 235

αMOS5 super junction MOSFET series for high-efficiency and high-density needs

Tue, Dec 07, 2021

Alpha and Omega Semiconductor has announced the 600V low ohmic and fast body diode αMOS5 super junction MOSFET series. αMOS5 is AOS’s latest generation of high-voltage MOSFET, designed to meet the high-efficiency and high-density needs for quick charger, adapter, PC power, server, industrial power, telecom and hyperscale datacentre applications.

The AOK040A60 is a 600V 40m-Ohm aMOS5 low ohmic device with the industry-standard TO-247 package tailored to address the thermal challenges of high-power AC/DC, DC/DC and Inverter stages.

As the EU ERP Lot9 regulation pushes the efficiency of single power supply units to titanium level, AOS aMOS5 600V low ohmic family offers a solution for single, interleaved, dual boost, totem-pole, and Vienna PFCs, as well as other hard-switching topologies. The 40mOhm product, followed by the upcoming 31mOhm, 65mOhm, and 80mOhm products, aims to provide customers with multiple choices to deal with different power ratings and efficiency requirements. The optimised capacitance of AOK040A60 offers hard and soft switching performances, with fast turn-on/turn-off behaviours while avoiding the risks of self-turn-on or shoot-through.

The AOK042A60FD is a 600V 42mOhm fast body diode device, designed to handle the repetitive hard commutation scenario, where the MOSFETs freewheeling body diode is reversely recovered in half-bridge or full-bridge topologies. The aMOS5 600V FRD solution is expected to further increase the system reliability as a solution for HB/FB topologies where hard switching happens during abnormal operations, such as short-circuit or start-up transients. The low Qrr of AOK042A60FD is expected to help to significantly reduce the losses during reverse recovery.

Besides server and telecom power supplies, the AOK040A60, AOK042A60FD and their derivatives will also target the demanding EV DC charging and solar inverter applications.

The 600V aMOS5 family will be expanded, including more low-ohmic and FRD products arriving early next year. As with most of the aMOS5 products, these new devices will also be made in 300mm facilities, with the intention of providing better supply elasticity during the global power semiconductor shortages.

Go to http://www.aosmd.com

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People counting keeps the workplace safe

Wed, Dec 01, 2021

For people detection and counting in indoor spaces, such as office space and municipal areas, Analog Devices has developed the EagleEye ADSW4000 which uses the PeopleCount algorithm.

It is the first in a series of application-level software algorithms forming part of the ADI EagleEye platform that includes a hardware subsystem based on ADI’s Blackfin embedded DSP and a set of application-level software building blocks enabling users to quickly develop their own people counting system. The ADSW4000 algorithm provides system edge node analytics to allow intelligent insight into use of space, and how people move safely within that space with distance monitoring. It is also useful to gather intelligence on the energy efficiency of spaces within ‘smart’ buildings.

The EagleEye counts people in indoor areas, based on the x and y co-ordinates of a person’s location. It uses zoned performance, enabling multiple areas for wider coverage and edge processing. The metadata is output over UART and no captured images are transmitted.

EagleEye can solve workspace needs and maximise worker wellbeing and productivity, says ADI. For maximum coverage area applications, accuracy of 80 per cent can be achieved in a 5m radius.

The Eval-ADSW4000KTZ evaluation kit with embedded ADSW4000 algorithm and cloud dashboard access is available now.

Analog Devices offers a suite of analogue and mixed signal, power management, radio frequency (RF), and digital and sensor technologies for customers in the industrial, communications, automotive, and consumer markets.

http://www.analog.com

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Versatile automotive touchscreen controller includes functional safety support

Wed, Dec 01, 2021

Multiple communication options, ISO 26262 functional safety support and flexible RF emission control are offered in the maXTouch touchscreen controller, says Microchip Technology.

According to the company, it allows automotive designers to satisfy various aspect ratios for touch displays in cars and, in response to requests by OEMs, includes additional functional safety support.

The MXT1296M1T can reconfigure its driving and receiving touch channels to match the exact screen format, from 1:1 to 5:1 aspect ratio, i.e., including the popular 8:3 automotive aspect ratio. This allows the customer to efficiently use the number of touch channels available, without needing a larger, more expensive touch controller. Customers can save additional development and validation time, as well as resources, by reusing a common PCB design to support different touch sensor aspect ratios. The MXT1296M1T is believed to be an industry first in that it enables the sensor channel reconfiguration by parameters. Settings do not require firmware modification, which reduced the design risk and also the time to market.

Clayton Pillion director of the human machine interface (HMI) business unit at Microchip Technology, observed: “Products with enhanced diagnostic features are a significant advantage to customers who are designing with unique features and increasing ISO 26262 functional safety requirements in mind”.

The MXT1296M1T maXTouch touchscreen controller offers two communication interfaces operating simultaneously, which allow a bridgeless connection to the back channel of the LVDS video link for touch information and a connection to a local microcontroller. The bridgeless topology reduces touch latency to improve the user experience. It also guarantees compatibility with the maXTouch software driver, available for all major automotive operating systems, including Linux, Android and QNX.

When connected to an appropriate local microcontroller, the second interface offers a number of benefits. Firstly, it offers a redundancy link to the head unit through a CAN bus or 10BASE-T1S automotive Ethernet link for increased functional safety at the system level. There is also local access and control of the maXTouch touchscreen controller’s features, for example, capacitive keys report, live touch sensor diagnostics and raw data for external and custom post-processing.

Finally, there is over the air (OTA) and secure firmware update capability using Microchip’s TrustAnchor100 companion chip

The MXT1296M1T embeds various functional safety features to constantly check the integrity of the touch controller operation, as well as that of the connected touch sensors. The failure modes effects and diagnostic analysis (FMEDA) and functional safety manual support the customer in designing, building and certifying a system for Automotive Safety Integrity Level B (ASIL-B) applications to the ISO 26262 standard.

The MXT1296M1T allows for high resolution transmit waveform control to lower RF emissions and avoid interference with the car radio or RFID systems. As screen sizes increase in cars, RF emissions generated by the projected capacitive touch technology are growing. (Emission limits vary in amplitude, frequency and bandwidth for each major car manufacturer.) The MXT1296M1T uses a dedicated on-chip 64-level DAC to accurately shape the waveform of the transmitting lines. As a result, designers can precisely control the frequency response and optimise the harmonic emissions to meet specific OEM-defined limits.

The MXT1296M1T configuration and tuning is supported by the latest release of maXTouch Studio integrated development environment (IDE). Microchip also offers the

ATEVK-MXT1296M1T-A evaluation kit for order. This includes a development board with USB bridge, 12.3-inch / 8:3 format / 1.1mm OGS (one glass solution) touch panel, and touch key add-on boards for mutual and self-capacitance.

There is also the ATMXT1296M1T-I2C-PCB development board for connection to a customer’s touch sensor

The MXT1296M1T is now available in volume production. ISO 26262 FMEDA and Functional Safety Manual will be available for purchase Q1, 2022.

http://www.microchip.com

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Secure microcontroller harvest energy for biometric cards

Tue, Nov 30, 2021

Energy harvesting and biometric security technologies are integrated in the ST31N600, a secure microcontroller from STMicroelectronics. It is based on an Arm SecurCore processor and can be used in biometric system-on-card (BSoC) and dynamic card verification (dCVV) systems, says the company.

The microcontroller is launched at this week’s Trustech 2021 and is designed for security in contact and contactless payment cards, ID cards, and transport ticketing.

The ST31N600, based on ST’s 40nm eSTM technology, integrates circuitry for energy harvesting and additional connectivity used by biometric and dynamic card verification (dCVV) applications. It enables battery-free smartcards to provide enhanced user authentication in contactless and online transactions. Based on the latest-generation Arm SecurCore architecture for secure microcontrollers, the ST31N600 meets EMV ISO 7816, ISO 14443, and ISO 18092 standards for contact and contactless cards. Designers can use the microcontroller to securely connect various types of peripherals to introduce value-added card features.

At Trustech 2021, it will be used to demonstrate secure biometric payment based on STPay-Topaz-Bio and dCVV for safe online transactions.

STPay-Topaz-Bio is a payment system that combines the security of biometric cardholder authentication to the speed and convenience of contactless transactions. This BSoC is based on the ST31N600 with a low power STM32L4 microcontroller, both embedded in an EMV (Eurocard Mastercard Visa) module. The ST31N600 hosts payment applications, biometric-template matching and energy harvesting to power the system.

The ST31N600 is also suitable for ecommerce payment based on dCVV technology, which provides a dynamic code refresh on each EMV transaction without needing an external battery or clock timer.

ST is showing the BSoC based on Linxens’ EMV module and pre-laminated inlay combined with a FPC T-Shape 2 (T2) sensor module from Fingerprint Cards.

There is also the dCVV which has the Ellipse EVC All-in-One, the first EMV micromodule with an integrated screen to display a dynamic security code for eCommerce protection.

Samples of the ST31N600 are available now.

http://www.st.com

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αMOS5 super junction MOSFET series for high-efficiency and high-density needs

People counting keeps the workplace safe

Versatile automotive touchscreen controller includes functional safety support

Secure microcontroller harvest energy for biometric cards

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