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Buck-boost converter improves portable device efficiency

Thu, Oct 03, 2019

With a low quiescent current (IQ) in its class of 6-microA and a high peak efficiency of 96 per cent, designers can now maximise a portable device’s battery life with the MAX77827 buck-boost converter from Maxim Integrated Products.

This 1.5A high-efficiency, compact converter allows 1.8V to 5.5V input and 2.3V to 5.3V output, while providing the system stability needed to minimise abrupt or unexpected shutdowns.

During mode transition when VOUT is set to 3.3V with a 15 microsecond rise/fall time, the ripple is less than 1 per cent of the output voltage, says the company. Fast load transient response provides stable system voltage from transient loads pulling down the system voltage. In extreme harsh conditions of going from 0A to 1A load in 15 microseconds, MAX77827 undershoot is controlled to six per cent of the output voltage where the undershoot of the competitive solution is 12 per cent with a longer recovery time.

The MAX77827 addresses the power requirements of low-power wide-area network (LPWAN) applications, asset tracking devices and a variety of Internet of Things applications.

This converter is a suitable solution to support applications with low power requirements because, regardless of the battery voltage variations, it can automatically transition between buck and boost modes to provide a consistent output power supply.

This converter supports space-constrained designs as its WLP measures 2.04mm x 1.64mm and it is less than 15mm² total solution size. It features a single external resistor to set the output voltage to provide additional savings to an external component and board space.

“High adoption of lithium ion batteries in smart consumer electronics is driving the increasing demand for this market, which is projected to reach $106,493 million by 2024,” said Rishab Sharma, analyst for P&S Intelligence. “Complementary technologies that help prolong battery life and stability can only contribute to their continued growth.”

“For any system design where battery life is critical, there is no better solution than the MAX77827,” said Eric Pittana, director for Mobile Power Solutions at Maxim Integrated. “With the lowest quiescent current and highest efficiency, designers can truly optimize their solutions and maximize their system performance. Specifically, for applications such as GPS asset tracking devices with single-use discharge, prolonging battery life is essential.”

http://www.maximintegrated.com

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Green tags encourage green RFID products

Thu, Oct 03, 2019

Smartrac Technology Group introduces the Eagle Green tags, the latest in the company’s green tag program. The compact inlays and tags are targeted at retail-optimised applications.

Eagle Green uses plastic-free, fully recyclable paper as the substrate, foregoes adhesives as much as possible, and comes with a laser-cut aluminium antenna that allows the complete recycling of aluminium residues, resulting in a significant carbon footprint reduction. All products within the green tag programme aim to address businesses that recognise the importance of a greatly reduce environmental impact across all applications and markets.

The tags are among the smallest retail-orientated inlays with global performance available on the market. Both have passed Auburn University’s ARC categories A, B, C, D, F, G, I, K, M, Q, W2 and W5, and are available in dry and paper-tag delivery formats with a compact size of 44 x 28 mm / 1.7 x 1.1 in, which helps in the conversion for end-application usage.

Equipped with an NXP UCODE 8 IC, which shares memory size and typical IC features with NXP’s UCODE 7 IC, a self-adjust feature helps maximises product performance in challenging environments, offers improved read and write sensitivity and a fast encoding speed.

The chip has an integrated brand identifier function to prove product authenticity and a memory safeguard system to protect business data.

These tags benefit from Smartrac’s platform and data management capabilities to record and manage a complete set of unique transponder data, for example UID no, order no, batch no, or yield, at production level in a controlled and secure way. The company’s product digitisation solutions enable full traceability of delivered RFID products.

“Our new Eagle green tags not only demonstrate that Smartrac’s green tag programme is gaining momentum: it also reinforces our resolve to provide the market’s most versatile, most advanced, innovative and sustainable RFID products designed and certified for a broad range of applications,” said Hal Hikita, senior vice-president, product management at Smartrac.

https://www.smartrac-group.com

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Endurance S components join streetlight connectors

Thu, Oct 03, 2019

TE Connectivity is expanding its Lumawise Endurance S Zhaga Book Streetlight connector offering with Endurance S components that have expanded electrical ratings up to 250VAC/5A, as well as alternate key combinations for protected mating.

Products in the Endurance S ecosystem include a receptacle connector as well as several base and dome combinations to house sense and control modules, protecting them in harsh environments. The IP66-rated receptacle assembly, base and dome combinations with a silicone elastomer gasket provide a sealed electrical interface and robust packaging solution.

The compact design, which is UV-resistant and suitable for outdoor use, can be mounted facing upward, downward or sideways. Individual components are said by TE Connectivity to be easy to assemble, with secure low-torque push-and-twist locking, and keying features on base and receptacle. A keying feature for non-Zhaga-specified applications is now available.

The receptacle assembly passes DC power to the mated module and provides a DALI 2.0 or derivative two-wire bus connection for communication and data transfer. The receptacle accepts 16-20 AWG solid and 18-20 AWG stranded tin-dipped wire.

Connector bases in PBT are available with diameters of 40 and 80 mm, with matching domes in clear or smoke grey polycarbonate. Larger bases have an optional vent to provide pressure optimisation inside the sealed control module and to reduce condensation through vapour diffusion. An optional skirt closes the gap between control module and lighting fixture, enhancing aesthetics and further protecting the unit against water, dust and insects.

The original connectors enable Zhaga-D4i certification for luminaires, which helps make them future-ready, and will be able to host the latest generation of nodes that fulfil the Zhaga-D4i requirements.

“We expect the Endurance S connector system to find use in numerous applications, including street and area lighting; commercial/municipal outdoor lighting; outdoor luminaires for parking lots, wall packs, walkways; city management systems; and in motion sensor modules,” says product manager Jeroen Iedema.

http://www.te.com

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CrossLinkPlus FPGAs speed and enhance video bridging

Wed, Oct 02, 2019

Lattice Semiconductor has introduced the CrossLinkPlus FPGA family for MIPI D-PHY based embedded vision systems. The new devices are low power FPGAs featuring integrated flash memory, a hardened MIPI D-PHY and high-speed I/Os for instant-on panel display performance, and flexible on-device programming capabilities.

Developers want to enhance the user experience by adding multiple image sensors and/or displays to embedded vision systems, while also meeting system cost and power budgets.

Key features of the CrossLinkPlus family of FPGAs include on-device reprogrammable flash memory to enable instant-on (< 10 ms), hardened, pre-verified MIPI D-PHY interface supporting speeds up to 6 Gbps per port and broad support for high-speed I/O interfaces such as LVDS, SLVS and subLVDS.

Power consumption can be as low as 300 microwatt (standby) or 5 microwatt (operating).

Lattice also provides ready-to-use IPs and reference designs to accelerate implementation of enhanced sensor and display bridging, aggregation, and splitting functionality, a common requirement for industrial, automotive, computing, and consumer applications. There is a comprehensive IP library, including MIPI CSI-2, MIPI DSI, OpenLDI transmitters and receivers. These IPs are compatible with other Lattice FPGAs for easy design portability.

This new series is fully compatible with the Lattice Diamond design software tool flow, from synthesis and design capture through implementation, verification, and programming.

CrossLinkPlus uses its on-chip flash to support instant-on (minimising visual artifacts that detract from the user experience) and flexible device reprogramming in the field.

“The use of MIPI D-PHY in applications ranging from industrial control equipment displays to AI security cameras is booming as OEMs look to capitalize on the economies of scale driven by the MIPI ecosystem,” said Peiju Chiang, product marketing manager, Lattice Semiconductor.

“Lattice’s new CrossLinkPlus FPGAs combine the flexible programmability and speedy parallel processing of FPGAs with vision-specific hardware, software, pre-verified IPs and reference designs. This lets OEMs devote more time to building innovative applications and less time enabling standard functions that don’t offer any competitive differentiation.”

http://www.latticesemi.com

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Buck-boost converter improves portable device efficiency

Green tags encourage green RFID products

Endurance S components join streetlight connectors

CrossLinkPlus FPGAs speed and enhance video bridging

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