by Susan Nordyk @ edn.com:
Extending Infineon Technologies’ OptiMOS 5 portfolio of power MOSFETs are 80-V and 100-V variants optimized for high switching frequencies used in synchronous rectification applications for telecom and server power supplies, as well as industrial applications such as solar, low-voltage drives, and power adapters. OptiMOS 5 devices slash on-resistance by up to 45% for 80-V parts and up to 24% for 100-V parts compared to the previous generation.
Additionally, the OptiMOS 5 80-V variant offers a 38% reduction in output charge and the 100-V variant a 25% reduction. Less output charge means reduced switching losses and lower voltage overshoot in hard switching topologies and synchronous rectification. Moreover, a reduction in gate charge of 24% for 80-V devices and 29% for 100-V devices also reduces switching losses, especially at light load operation and in applications requiring high efficiency throughout the entire load range.
Next-generation MOSFETs cut on-resistance – [Link]
Compact installation step relays Finder 26 series save energy similarly like latching relays, but they also operate on AC voltage.
Step relays are able to effectively control lighting or other devices and they significantly simplify circuit complexity at the same time. If you´re familiar with a bistable (latching) relay, then you know, that a relay can keep its status (On/Off) even without a power supply. A step relay, which we´d like to introduce to you this time, is mechanically significantly different from latching relays, but it also features this energy-saving property – i.e. maintaining the On/Off status even without a power supply.
A step relay is usually available with an AC coil and it´s very simply controllable by one push-button switch (momentary SPST-NO). The principle of the step relay is in the fact, that a driving coil mechanically moves a contact mechanism in various sequences. Each switching of a relay (switching a power to a coil) moves a mechanism in one “step” further. In the simplest case the sequence looks as On/Off/On/… But it also can be in other way, as illustrated in the attached picture. Step relay are probably the most frequently used for switching of lighting. This is enabled by a fact, that simple push-button switches, controlling a coil, are connected in parallel. In result, the circuitry gets much simpler and to control one or two lighting circuits from several places, it´s necessary to use only 2 wires (moreover only with a small cross-section – say 0,5mm2). Second saving is in a practically zero power consumption of the relay itself, as energy is only necessary to change a relay status.
Finder 26 series is constructed as a “small box”, which can be placed on a panel but also for example – into a common wall installation enclosure. On stock we keep the type 26.02.8.230.0000, what´s a two-pole (10A) relay with 230Vac coil, with the On/Off sequence. Upon order, we´re able to supply you also versions with 12/24/48/110Vac coils and also modules for usage with 12/24VDC and for usage with illuminated switches.
Detailed information and a comprehensive table about possibilities of usage of particular types will provide you the Finder 26 datasheet. Useful examples of usage of these and also other switching components from Finder will provide you the document „Finder – The Electrician´s guide”.
With a step relay Finder 26 can be saved energy and also installation costs – [Link]
Vishay Intertechnology introduced a new automotive-grade IHLP® low-profile, high-current inductor with an industry-high continuous operating temperature range to +180°C. Offered in the 2525 case size with a low profile of 3.0 mm, the new Vishay Dale IHLP-2525CZ-8A provides a wide range of inductance values from 0.47 µH to 22 µH.
With a frequency range up to 1 MHz, the AEC-Q200-qualified device released today serves as a high-performing, space- and power-saving solution for voltage regulator modules (VRM) and DC/DC converters in high-temperature automotive applications. End products include engine and transmission control units, diesel injection drivers, entertainment and navigation systems, noise suppression for motors, windshield wipers, HID and LED lighting, heating and ventilation blowers, and power seats and mirrors.
New Vishay Intertechnology Automotive-Grade Low-Profile, High-Current Inductor Offers Continuous High-Temperature Operation to +180°C – [Link]
Moreover, new UMTS/HSPA module Quectel UG95 is pin-compatible with GSM/GPRS module M95 thus offering extraordinarily simple way to migrate to 3G without a PCB redesign.
To have a possibility to choose a component on a given PCB place according to our wish is certainly advantageous. For example in audio equipment to use a simple operating amplifier (for less demanding applications) or in other case to use a pin-compatible high-end operating amplifier for more demanding applications (on the same PCB position). This compatibility is common in some fields, in other ones not that much …
In a segment of GSM/GPRS/UMTS modules is this compatibility a sort of an exception, so arrival of the new Quectel UG95 module on the market can be an interesting solution how to use the same design for smaller GSM/GPRS/EDGE connection (with the M95 module) and also for a substantially faster UMTS/HSPA connection with the UG95 module.
Do you use 2G module M95 and you wish for a higher transfer speed?
UG95 offer extraordinary possibility to design your device able to work with M95 or also with UG95 module. UG95 features more pins than M95 but their position is compatible, so at a PCB design it´s possible to place all pins on a PCB and their real use will depend on whether you´ll use M95 or UG95.In result it´s possible to assemble the same PCB with M95 or UG95 module according to given application requirements.
UG95 is based on a new Intel XMM6255 chipset. In general, UMTS/HSPA transfer offers not only a higher transfer speed of pictures and data but mainly higher reliability of connection even in hazard conditions. That can be very important for critical applications like telemetry, process control, security and similar. Because from a new module we usually expect enhanced functionality, even in this field the UG95 has what to offer, for example:
- rich set of internet protocols – TCP/UDP/PPP/MMS*/SMTP*/FTP*/SSL* (*-in development)
- standard industrial interfaces – USB 2.0/UART/I2C/PCM
- high sensitivity and top-class audio algorithms, digital audio output (PCM)
New module is available in a form of the module itself – UG95EA-02-NCH-STD (suitable for a mass usage into a target appliance) and also in a form of a known „adapter board“ UG95-TE-A mainly intended for development using the UC20EVBKIT development kit.
UMTS module UG95 = reliable transfer even in hazard conditions – [Link]
Lattice Semiconductor has developed two power-saving IP cores intended for use in smartphones and mobile devices. Known as ‘Voice Solution’ the two IPs are: Voice Command supporting hands-free and always-on applications, and Voice Recognition which improves the user experience by enhancing security and reducing false trigger inputs. They essentially act as a processing front-end, allowing the main processor to remain in low power dormant mode until voice commands have been processed and recognized by the Lattice Voice Processor.
Lattice FPGA Voice Processors – [Link]
Toshiba America Electronic Components, Inc. (TAEC) announced the launch of a new transistor output photocoupler in a low-height SO6L 4 pin package – the TLP385. With its low-height of 2.3 mm (max), 45 percent lower than DIP4 packages, the TLP385 can be used in situations with strict height requirements. Applications including motherboards, programmable logic controllers, AC adapters, I/O interface boards, inverter interfaces and general purpose power supplies are suited to the new photocouplers.
Toshiba’s new photocoupler has an isolation specification equivalent to DIP4 F (wide lead) type package products, and provides a creepage and clearance distance of 8 mm (min) and isolation voltage of 5 kVrms (min).
Toshiba Introduces New Low-Height Transistor Output Photocoupler – [Link]
by Susan Nordyk @ edn.com:
International Rectifier’s IRFH4257D is a 25-V dual N-channel power MOSFET housed in a 4×5-mm PQFN power-block package aimed at 12-V input DC/DC synchronous buck applications, such as telecom equipment, servers, graphic cards, and computers. With this latest power-block addition, designers now have the option of choosing a 4×5-mm or 5×6-mm PQFN to suit their design requirements.
Dual MOSFET squeezes into PQFN package – [Link]
by Bill Schweber @ digikey.com:
With very few exceptions, every electronic circuit needs an oscillator, also referred to as a clock, clock generator, or timing circuit. Its role is to provide the “heartbeat” for the processor, memory functions, communications ports, A/D and D/A converters (if any) and many other functions. In non-critical, low-budget situations such as $10 mass-market electronic thermometers, this clock may be made from a simple resistor/capacitor (RC) oscillator. However, for the vast majority of situations which are more critical, the oscillator is based on a quartz crystal (Figure 1). This is a mature (80+ years) and highly effective technology which can support of wide range of frequencies from kHz to hundreds of MHz, with performance spanning fairly good to excellent, depending on the crystal cut, fabrication, packaging, and other considerations.
MEMS Oscillators Challenge Quartz Crystals in RF Applications – [Link]
80 dB acoustic signal at only 3V power supply and a really miniature size place this new component into a top class.
Belgian company Sonitron and its top-level products ar probably familiar to you from our articles and from our offer in this segment. We continue in increasing of standard stock types and this time we have here an extraordinary interesting type – SMA-13LV, interesting mainly for low-voltage applications. Series of buzzers marked as “SMA” is known by its variousness, as we find here types with loudness of 75-98 dB, THT and SMT vesions, and versions with a stable, as well as intermittent signal. Various izes from 13 to 30 mm with a pitch of 7.5 to 20.32 mm enable to select the right type for a given application. In general, bigger types provide a more loud signal, but it depends on a concrete type. This series is suitable for general use – everywhere, where a reliable buzzer is necessary, including industrial conditions.
For a succesfull use, it´s only necessary to connect a suitable supply voltage – usually in extremely wide range (for example 1.5-15V). Usually, on the upper end of a supply voltage range we get the highest loudness and at lower voltages we receive a higher lifetime.
Very similar is also the SMAT series (transducers), which in contrast to the SMA series doesn´t contain a driver, that´s why it needs an extenal electronics.
For really tough conditions, the Sonitron SAP. series is suitable. These are buzzers for various usage in traffic, for example as a reverse movement indicator (danger of close approximation). They excell in extreme rigidity, what make them widely used even in avionics, miltary and trucks. SAP series has a specifi usage, that´s why we keep these types as items upúon request.
Another novelties in our standard stock offer can be found below this article. Detailed information can be found in datasheets at particular types and in the new Sonitron 2014 catalogue.
Piezo buzzer Sonitron SMA-13LV deploys maximum from a minimum – [Link]
by Robert Kollman @ edn.com:
Aluminum electrolytic capacitors remain a popular choice in power supplies due to their low cost. However, they have limited life and are sensitive to both hot and cold temperature extremes.
Aluminum electrolytic capacitors are constructed with foils placed on opposite sides of paper saturated with an electrolyte. This electrolyte evaporates over the capacitor’s lifetime, altering its electrical properties. If the capacitor fails, it can be spectacular as pressure builds up in the capacitor, forcing it to vent a combustible and corrosive gas.
Avoid these common aluminum electrolytic capacitor pitfalls – [Link]