PRO ENCLOSEDPOWER SUPPLIES F


ENCLOSED POWER SUPPLIES FO ALWAYS constant power is needed. Operating


constant pow r is needed. erati


FOR ALWAYLWAYS ON SECURECURITYSYSTEM when power off, battery low


froma universal AC input, these units provide 1 - 3 DC outputs with battery charger suitable for 12 or 24V


from a universal AC input, these units provide 1 - 3 DC outputs with battery charger suitable for 12 or 24V battery systems.battery systems.


Output voltages are 13.8V or 27.6VDC andmodels are also available with an auxiliary +5V 3A output. Output power ratings are 75, 100 or 155Watts.


Output voltages are 13.8V or 27.6VDC and models are also avai able with an auxi ary +5V 3A output. Output power ratings are 75, 100 or 155 W


s.


Powersolve’s PQE75-155 Series of AC-DC battery-backed power supplies are ideal for applicatiions such as security systems w ere


Powersolve’s PQE75-155 Series of AC-DC battery-backed power suppl es are i eal for appl cat ons such as security systems where


These power suppl es i corporate a number of features designed to ensure that constant power is available i


available in the event of m failure. These include “auto switch” failure. These include “auto sw ch”


These power supplies incorporate a number of features designed to ensure that constant power is the event ofmains


en power off, battery low protection, battery polarity


protection, battery polarity


protection, brow n-out (AC i put w) protection and an i tegral constant current l


iting circui


alarm signals for A low as w ll as sh


protection, brown-out (AC input low) protection and an integral constant current limiting circuit. Other significant features include alarmsignals for AC OK and battery low, as well as short circuit, overload and overvoltage protection. The PQE75-155 Series meet al relevant safety and EM EMS standards.


r significant features inclu and battery t circu t, o erload


and overvoltage protection. The PQE75-155 Seriesmeet all relevant safety and EMI/EMS standards.


Operating temperature range i up to 70⁰C with derating and cooling for mostmodels is by free air convection. www.powersolve.co.uk


Operating temperature range is up C with derating and cool g for st models is by free air con ection www.powersolve.co.uk


to CURITY SYSTEYSTEMS


PRODUCTS


POWER ELECTRONIC


BUCK REGULATORS FOR ADVANCED INFOTAINMENT


A familyofmonolithic synchronousbuck


Corporation with step-down 5V and 3.3V primary rails topoint-of-load(POL) inputs as l w as 0.6V for GPUs, FPGAs, DSPs and pany’s ISL78233, ISL78234


ary rais to point-of-load (POL) inputs as lowas0.6Vfo6VforGPUs, FPGAs,DSPsand SOCs.Thecompa y’


am y of m nol hic synchronous buck regulregulatorshasbeenrelators has been releasedby Intersieased by Intersil Corporationwithstep-down5Vand3.3V pri


fa ow


SOCs. The com any’s ISL78233, SL78234 andISL78235deliver3A,4A3A 4Aand5A,


and ISL78235 delver 3A, 4A and 5A, respectively, fotai


i fotainmentheadunitsandadvanceddriver assistancesystems (ADA


respectively,of conti of continuousoutput current to nfo


assify objects. The pin-


assistance systems (AD S) enabling cameras todetectandclto detect and classifyob


compatiblesyncbuckregulatorsareideal for veapplications fromentry-level to


compatible sync buck regulators are i eal for automotive


autom tive appl ations from entry-level to luxury carmodels. www.intersil.com


ev


luxury car models. www.intersil.com


ent head units and advanced driver DAS) enablingcameras bjjects.Thepin-


nuous output current to


BUCK REGULATORS FOR ADVANCED INFOTAINMENT


ONICS


FORTIFYING PROFIBUS-DP


Linear Technology Corporation has introduced its LTC2876 and LTC2877, high voltage tolerant RS485 transceivers targeted for PROFIBUS-DP (decentralised periphery) master and slave devices. As with any fieldbus, PROFIBUS-DP systems are prone to installation cross-wiring faults, ground voltage faults, or surge, which can cause catastrophic overvoltage conditions that exceed the absolute maximum ratings of typical transceivers. Whether transmitting, receiving, in standby or powered off, these two devices tolerate ±60V on their bus pins, eliminating common damage due to transmission line faults. These components provide multiple


levels of protection that make them suitable for a variety of PROFIBUS-DP applications, including discrete manufacturing and process automation. An extended ±25V input common-mode range and full failsafe operation improve data communications reliability in electrically noisy environments and in the presence of ground loop voltages, which would otherwise cause data errors and possible device damage. Their high ESD protection guarantees the ability to withstand ±52kV HBM on the transceiver pins without latchup or damage; all other pins are protected to ±15kV HBM. Fully symmetric receiver thresholds ensure the devices maintain good duty cycle symmetry at low signal levels and boost receiver noise immunity, while supporting full failsafe operation. Both devices are tested with PROFIBUS IEC 61158-2 and TIA/EIA-485-A (RS485) loads to ensure compatability. The LTC2876 is available in an RoHS


compliant 8-pin 3mm x 3mm DFN or MSOP package, while the LTC2877 includes a logic supply and is available in an RoHS compliant 10-pin 3mm x 3mm DFN or MSOP package.


www.linear.com/product/LTC2876 / ELECTRONICS ELECTRONICS ELEC RO ELECTRONICS CS | MAY 2016 MA 201 23 23


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