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EETE FEB 2015

Off-line switcher ICs meet 2016 European and US efficiency rules The LinkSwitch-4 Switcher ICs from Power Integrations meet the latest efficiency directives, employing adaptive base and emitter switched drive technology that enables safe use of low-cost bipolar junction transistor switches. LinkSwitch-4 is a family of CV/CC primary-side regulated (PSR) switcher ICs that use an adaptive base and emitter switched drive scheme for bipolar junction transistor switches (BJTs) that substantially improves power conversion efficiency and eliminates reliability concerns due to secondary breakdown. The devices target chargers and adapters required to meet stringent new efficiency rules from the US Department of Energy (DoE) and European Code of Conduct (CoC), both of which are scheduled to come into force in January 2016. The new DoE rules, known as DoE- 6, require efficiency compliance measurements to be taken at the end of the charger USB cable; LinkSwitch-4 exceeds the requirements while using a low-complexity Schottky diode secondary, even for high-current 1.5A and 2A smartphone chargers. The ICs incorporate a multimode PWM/PFM controller with a quasi-resonant switching strategy to maximise the efficiency, meet less-than-30 mW no-load limits and at the same time maintain fast transient response. An operating frequency of up to 65 kHz enables transformer size to be minimised Power Integrations http://ac-dc.power.com 512 kByte STM32F3 extends mixed-signal MCU family STMicroelectronics has extended its STM32F3 microcontroller series for applications that require high performance and innovative features at affordable cost. The new devices add larger memory densities up to 512 kByte Flash and 80 kB SRAM, as well as richer peripherals for high-speed control and off-chip storage. The STM32F3 series is ST’s entry point to its ARM Cortex-M4 microcontroller portfolio. The M4 core with DSP and floating-point unit, running up to 72 MHz, executes deterministic routines such as motor-control loops up to 43% faster with the unique ST “Routine Booster” based on core-coupled memory (CCMSRAM). Positioned in the performance spectrum immediately above ST’s STM32F1 Cortex-M3 series, STM32F3 devices are part of the STM32 portfolio that comprises more than 600 devices offering extensive hardware and software commonalities, easy-to-use design tools, and development ecosystem. With up to 512 kByte Flash memory in the STM32F303 and STM32F302 devices, the F3 series can support more sophisticated applications. New features include extra SPI and I²C communication interfaces, and a Flexible Memory Controller (FMC) with 36 MHz access on 8/16bit bus for various off-chip storage and LCD modules. There are also up to three 144 MHz 16-bit motor-control timers for multimotor products found in home appliances, power tools, and industrial equipment. STMicroelectronics IP builds MNV memory at mid-density www.st.com Synopsys’ DesignWare medium density NVM IP family reduces die cost by up to 25%: an alternative to embedded flash memory, NVM IP eliminates need for extra masks or processing steps for analogue ICs Reprogrammable Design- Ware Medium Density NVM IP delivers flash-like functionality without additional masks or processing steps, reducing die cost by up to 25%. It can provide up to 64 kBytes of on-chip memory with more than 5x the density of lower bit count NVM solutions. The IP enables microcontroller integration with on-chip reprogrammable NVM in 180nm 5V CMOS and BCD processes, where embedded flash capabilities are unavailable, Sealed piezo switch with tactile symbols PSE HI (high impact) switches can be delivered with raised symbols, letters and numbers in addition to various colours, or legend inscriptions. The switch surface is made of anodised aluminium, which can be pre-formed with raised symbols to withstand long-term wear and give good user haptics. A variety of standard legends and/or raised symbols is offered to indicate function. The laser etched legends or preformed raised symbols provide long-term protection against wear. Raised symbols can be numbers, as well as characters from the Braille alphabet. These flexible design options make it possible to offer a wide variety of standard or custom options to meet individual design requirements. PSE HI piezo switches have an ingress protection class rating of IP67. The hermetic seal makes the switches suitable for use in areas that must be regularly cleaned or disinfected. The switches have a robust metal housing, suited for use in harsh environments where there exists the potential for vandalism. Impact resistance according to DIN EN 50102 is IK06. The switch is rated 0.1A @ 42 VAC/60 VDC. The piezo switching element offers a long service life of more than 20 million switching cycles. Typical applications include pedestrian crossing walks, elevators, truck lifts, material-handling equipment, safety equipment, ticketing terminals, service stations, food service equipment and processing plants. Schurter www.schurter.ch and can be equipped with integrated Error Checking and Correction (ECC) functionality for additional system reliability. Synopsys positions the memory as an alternative to EEPROM or flash memory when integrating microcontrollers in analogue IC designs for smart sensors, power management and touchscreen controller applications. The DesignWare Medium Density NVM IP products bring flash functionality to 5V CMOS and BCD process technologies, where embedded reprogrammable NVM is needed. Error checking and correction functionality provides additional system reliability and reduces implementation efforts. The NVM IP offers 40 nsec access time, providing fast read times and real time computing. Validated through rigorous characterisation, qualification and reliability testing in Synopsys labs, the NVM IP supports temperature ranges from -40°C to 125°C with 10 years of data retention. Synopsys www.synopsys.com 44 Electronic Engineering Times Europe February 2015 www.electronics-eetimes.com


EETE FEB 2015
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