PRODUCTS POWER ELECTRONICS IMPROVED POWER SUPPLY WITH OFFLINE FLYBACK ICS


heatsinks. The company’s range of InnoSwitch3 devices are ideal for power supplies with challenging energy consumption, footprint or thermal constraints, particularly those targeting mandatory Total Energy Consumption (TEC) specifications. This IC family is optimised into


P


ower Integrations has released a family of offline CV/CC flyback


switcher ICs. The new devices are claimed to achieve up to 94% efficiency across line and load conditions, which can significantly reduce power supply losses by a further 25%, enabling the development of compact power supplies up to 65W without


three application-specific series: l CE: Current External. Includes


accurate CC/CV regulation with external output current sense for optimum design flexibility. Targets compact single-voltage chargers, adapters, IoT and building automation. l CP: Constant Power. Ideal for


USB Power Delivery (PD), rapid charging and other applications


where a dynamic output voltage is required. l EP: Embedded Power. Features


the family’s highest-rated MOSFET (725V) and provides full line and load protection with good multi- output cross-regulation for industrial applications. These newest flyback switcher


ICs employ Power Integrations’ isolated digital communications technology, FluxLink, plus synchronous rectification, quasi- resonant switching and a precise secondary-side feedback sensing and control circuit. This results in highly efficient, accurate, reliable power supply circuits without the need for optocouplers. www.power.com


AUTOMOTIVE SAFETY


A series of chip ferrite beads has been developed by Murata for use in automotive powertrain safety applications. These devices are for use as noise suppression components in power line circuits installed in engine bays and LED headlights that require guaranteed performance at high temperatures. In the automotive market, the need for noise


NEW COMMON MODE CURRENT COMPENSATED CHOKES RELEASED


Schaffner has extended its range of common mode current compensated chokes with the introduction of its new RT series. These new RT chokes are available with horizontal and


vertical mounting options and in 2-line and 3-line versions. Standard current ranges are from 6 to 20A with voltages up to 600VAC. The new product range enables developers to integrate great saturation behaviour together with high common mode performance on to a PCB. The wide range of 24 different combinations of layout,


mounting position and current-inductance ratings makes the series a great fit for solar inverter and switch mode power supplies (SMPS). The saturation behaviour and the ability to apply forced cooling, in order to increase maximum possible current, are very useful for motor drive (VSD) applications up to 32A. Schaffner’s RT chokes comply with RoHS and REACH


requirements and with their open-frame construction and UL part lists are simple to certify to the most important


global safety norms, including UL and ENEC. www.schaffner.com


suppression to counteract conductive and radiated noise has recently increased due to the development of motorisation of various functions including those in hybrid and electric cars. For example, the number of motor control circuits (with brushes) or inverter circuits (brushless) has increased with the motorisation of powertrains, requiring noise suppression components that are capable of dealing with large currents. In order to reduce vehicle weight – which is directly related to fuel economy improvement – the ECUs for engine systems and safety systems tend to be located in engine bays that reach high temperatures, and hence require noise suppression components capable of working in, and sustaining high temperatures. www.murata.com


Powerstax, the UK distributor for Behlman Electronics Inc., has announced that an options list is now available illustrating how their fifteen BL High-Power Series AC Power Sources/Frequency Converters can be customised. Behlman’s BL High-Power Series AC Power Sources supply clean, regulated AC power. The BL High-Power Series with Options V and F are available with either single- or three-phase output in a wide range of power, from 1KVA to 20KVA. Inputs are any worldwide three- phase mains power with some models available with single-phase input. www.powerstax.com


COMPACT SINGLE OUTPUT POWER SUPPLIES PROVIDE UP TO 300W


A series of compact, single output AC-DC converters has been announced by Powersolve that are designed to provide up to 300W across a wide operating temperature range of -30⁰ to 85⁰C. The seven model PSY300 series power supplies are open PCB units with a 3 x 5in footprint. Operating from a wide 90 to 264VAC input


range with active PFC, models in this series provide output voltages from 12 to 54VDC with output currents from 3.70A to 16.67A convection cooled and from 5.55A to 25A with fan cooling. A 12V, 0.3A fan supply is a standard feature. Powersolve can also supply models with output voltages from 9V to 57VDC, still within the


16 OCTOBER 2017 | ELECTRONICS


safety approvals, but subject to minimum order quantities. These PSY300 units are efficient (up to 92%)


and feature a no load power consumption figure of 0.25W without fan and the integral LED power indicator. The power supplies are protected against short


circuit, over current, over voltage and over temperature and feature remote sense and power fail signal. This series meets all relevant EMI radiated and


conducted standards and have a number of safety approvals including CE, CB EN60950-1 and UL/cUL60950-1 www.powersolve.co.uk


/ ELECTRONICS


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