ICs & Semiconductors Archives - Page 221 of 235

Resonant controller IC is designed for power supply and lighting drivers

Wed, Jul 11, 2018

The second generation ICL5102 resonant controller IC has been designed by Infineon specifically for power supply and lighting drivers.

Main target applications are LED drivers for professional and industrial lighting, and street lighting. The controller IC can also be used for offline AC/DC power supplies and LCD TVs, adds Infineon.

The ICL5102 integrates power factor correction (PFC) and half-bridge (HB) controllers in a single DSO-16 package. It supports universal input voltages ranging from 70 to 325V AC.

Only a few external components are required to configure and support the controller IC, says Infineon, adding that all parameters are set by resistors. The ICL5012 supports fast start-up under 500 milliseconds at less than 100 microA. According to Infineon, the industry-leading PFC is greater than 99 per cent and total harmonic distortion (THD) is less than 3.5 per cent. The controller has up to 94 per cent efficiency by resonant topology, while the active burst mode for low standby consumes less than 30 mW. An enable/disable function supports dimming.

The PFC controller features brown-out detection, adjustable THD for light load operation, and high power factor correction. Due to the high accuracy of bus voltage sensing, only four pins are required for PFC. The resonant HB controller has an integrated 650V high-side driver using an internal coreless transformer with self-adaptive dead time ranging between 250 and 750 nanoseconds, and an operating frequency up to 500kHz. It can detect overload, short circuit, bus, HB or output under- and over-voltage as well as over-temperature. An integrated capacitive mode regulator prevents operation in capacitive mode. All protection features use auto restart (no latch).

Engineering samples and a reference design, REF-ICL5102-U130W-CC, are available now. Full production and shipment will start in Q2 2018.

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http://www.infineon.com/icl5102

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Sensor interface IC enables next-gen intelligent electrochemical sensors

Tue, Jul 03, 2018

Believed to be the only IC that incorporates potentiostat and electrochemical impedance spectroscopy (EIS) functionality on a single chip, the ADuCM355 has been released by Analog Devices.

The precision analogue microcontroller with bio-sensor and chemical sensor is designed for applications such as industrial gas sensing, instrumentation, vital signs monitoring and disease management. According to the company, it features the industry’s most advanced sensor diagnostics, best-in-class low noise and low power performance, and smallest form factor. Unlike traditional discrete solutions, it does not need multiple ICs to achieve similar performance, for increased reliability and cost savings.

It combines the high performance, low power, small form factor and feature set needed to enable next generation portable gas detectors and to set new benchmarks in reliable gas detection while minimising the cost of ownership, said Jacob Spector, global marketing manager, Portable Gas Detection for Honeywell Industrial Safety.

It has been used by PalmSens for mobile gas detection: “PalmSens is committed to make electrochemistry easier, more portable and more accessible,” said Niels van Velzen, CTO at PalmSens. “ADI’s ADuCM355 is at the heart of the new EmStat Pico, the world’s smallest general purpose electrochemical interface module. EmStat Pico is a hardware and software design platform that allows measurement in minutes and is ideal for the development of portable, wearable and space constrained sensor applications,” he added.

The ADuCM355 low power precision analogue microcontroller is based on the ARM Cortex M3 processor, with 26MHz core, 128kbyte Flash and 64kbyte SRAM. Designed to control and measure chemical and biosensors, it supports dual potentiostat (8.5-micro A, 1.6-microV RMS) and three or more sensor electrodes. It has a flexible, 16-bit, 400ksamples per second measurement channel.

There are advanced sensor diagnostics and integrated analogue hardware accelerators, integrated into the 72-pin LGA package, measuring 6.0 x 5.0mm.•

The ADuCM355 is sampling now, with production quantities available.

http://www.analog.com

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Cypress and Semtech link up to produce two-chip module for smart city applications

Wed, Jun 20, 2018

Cypress Semiconductor Corp has collaborated with Semtech Corporation on a compact, two-chip LoRaWAN-based module deployed by Onethinx.

The highly integrated Onethinx module suits smart city applications that integrate multiple sensors and are in harsh radio environments. Using Cypress’ PSoC 6 microcontroller’s (MCU) hardware-based secure element functionality and Semtech’s LoRa devices and wireless radio frequency technology (LoRa Technology), the solution enables a multi-layer security architecture that isolates trust anchors for highly protected device-to-cloud connectivity.

In addition, the PSoC 6 MCU’s integrated Bluetooth low energy (BLE) connectivity provides a low-power, out-of-band control channel.

Cypress says the PSoC 6 device is the industry’s lowest power, most flexible Arm Cortex-M dual-core MCU with a power slope down to 22-microA/MHz active power for the Cortex-M4 core. The device is a natural fit with Semtech’s latest LoRa radio chip family, which offers 50 per cent power savings in receive mode and 20 per cent longer range over previous-generation devices.

Security is a primary concern for many smart city applications. The Onethinx module uses the integrated secure element functionality in the PSoC 6 MCU to give each LoRaWAN-based device a secret identity to securely boot, on-board, and deliver data to the cloud application.

Using its mutual authentication capabilities, the PSoC 6 MCU-based, LoRa-equipped device can also receive authenticated over-the-air firmware updates.

Key provisioning and management services are provided by Internet of Things’ security provider and member of the Bosch group, ESCRYPT, for a complete end-to-end, secure LoRaWAN solution.

The module, offered by Cypress partner Onethinx, connects to Bosch Sensortec’s cross domain development kit (XDK) for micro-electromechanical systems (MEMS) sensors and to the provisioning system from ESCRYPT to securely connect.

“With its long range and low power capabilities in a compact footprint, Semtech’s LoRa Technology is ideal for vertical applications,” said Vivek Mohan, director of IoT in Semtech’s Wireless and Sensing Products Group. “Combining LoRa Technology with Cypress’ PSoC 6 MCU in a purpose-built IoT module will accelerate the delivery of leading-edge IoT solutions for smarter cities and a smarter planet.”

“Devices for LoRaWAN networks need to be secure to protect the data they generate and process,” said Jack Ogawa, senior director of marketing for the MCU business unit at Cypress. “We’re excited to work with LoRaWAN ecosystem members to offer developers the unique combination of secure PSoC 6 MCUs and Semtech’s new lower power, longer range LoRa technology to address smart city applications.”

http://www.cypress.com

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Linear LED controllers do not require inductors for signage and smart-lighting

Thu, Apr 05, 2018

Diodes offers the AL5814, AL5817, AL5815 and AL5816 linear LED controllers, claimed to deliver dimmable and adjustable drive current for LED strings with more than 80 per cent efficiency. The AL58xx series provides a low bill of materials cost for a range of applications in the commercial and industrial areas including signage, instrumentation illumination, lighting of appliance interiors, architectural details and general smart-lighting installations.

Input range is 4.5 to 60V. The AL5814, AL5817, AL5815 and AL5816 linear LED controllers do not require inductors and maintain good EMI performance, making system integration simpler. Internal power dissipation is also minimised compared with other designs due to an external power transistor, says Diodes. The AL58xx series is capable of providing up to 15mA to an external MOSFET or bipolar transistor to drive LED strings. The LED drive current is configured by an external resistor with four per cent reference voltage accuracy and excellent temperature stability. In addition, the AL5815 and AL5816 devices support PWM diming, while the AL5814 and AL5817 devices support both analogue and pulse width modulation (PWM) dimming.

Protection features include over-temperature and input under-voltage lock-out. The AL5814 and AL5817 devices also provide ‘LED open’ protection via a Vfault pin, as well as LED thermal fold-back protection.

The linear controllers exhibits good EMI performance and the wide temperature range of -40 to +105 degree C enables the parts to also operate in harsh environments.

The AL58xx series is available in SOT-25 and thermally-enhanced MSOP-8EP packages.

Diodes manufactures and supplies application specific standard products within the broad discrete, logic, analogue and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.

The company’s portfolio includes diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC/DC converters and controllers, DC/DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes also has timing, connectivity, switching, and signal integrity solutions for high-speed signals.

Corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California, USA. Design, marketing, and engineering centres are located in Plano, Milpitas, Taipei, Taoyuan City, and Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany.

Diodes’ wafer fabrication facility is located in Manchester, with an additional facility located in Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei.

http://www.diodes.com

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Resonant controller IC is designed for power supply and lighting drivers

Sensor interface IC enables next-gen intelligent electrochemical sensors

Cypress and Semtech link up to produce two-chip module for smart city applications

Linear LED controllers do not require inductors for signage and smart-lighting

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