Home Blog  

23 Nov 2012

SKL14 can be used in switch-mode power supplies or as protection diodes and thanks their really miniature dimensions, they are also suitable at the lack of PCB space. 

SMT Technologies enable a substantial increase of current density thanks to a very good heat transfer from a component to a PCB. Almost a zero length of „leads“ of SMT components also features another positive aspects like a significant suppression of a parasitic inductancy and a possibility to construct circuits with a high components density and a minimal PCB tracks length, what significantly decreases an undesired radiation (EMI) for example in switch-mode power supplies.

A very small forward voltage drop <0.55V/1A and the speed of Schottky diodes make the SKL14 a universal diode suitable for example for rectifying, for SMPS or as a reverse polarity protection diode. A relatively high current is mainly enabled by a Power SOD-123 package with enhanced thermal properties.

Detailed information will provide you the SKL14 datasheet and in the Diotec SMT diodes overview. In case of interest, please contact us at info@soselectronic.com.

SKL14 – 1A Schottky diode will fit everywhere – [Link]

16 Nov 2012

New family of conectors picoMAX from company Wago is substantially lower than traditional connectors and it is extremely resistant to vibrations.

picoMAX is a vast system of connectors with spring contacts for „wire-to-board“, „wire-to-wire“, „board-to-wire“ but also „panel-feed-through“ connections with very compact dimensions and universal usage, with pinov 3.5mm, 5.0mm and 7.5mm pitch. The biggest construction novelty of the picoMAX series is a new substantially changed design in comparison to a traditional design. New design of a pin+socket contact bridge enabled a significant decreasing of the connector´s height and at the same time a perfect mechanical connection of both parts to each other. It means a significant improvement of resistance to vibrations (up to 20g) in comparison to common connectors. A sturdy connection is further supported by integrated locking latches which avoid disengagement caused by vibrations

A new construction resulted in a very short path for an electric signal, what means a lower contact resistance (contact bridge and pins are from a tin-plated electrolytic copper) and a higher reliability. An absolute reliability of the contact is ensured even at high temperatures, thanks to an innovative clamp technology and an insulation material based on glass fiber reinforced PPA (polyphtalamide). As we might expect at Wago mark – connecting of wire conductors is simple, without specialty tools (only a usual screwdriver is necessary to release a wire) and in praxis there´s no limitation regarding the type or termination of a wire conductor (solid, stranded, fine-stranded, with ferrules, …).

A big plus of the picoMAX series is a diversity. With the picoMAX series we can be sure, that in this family we´ll find mutually compatible types for all connections. Simple and at the same time sophisticated system of coding enables to ensure a correct installation, for example in applications with several connections on one place. Despite of a vast amount of combinations of various connectors, the picoMAX system features a simple and an intuitive application.

picoMAX is also available in the „picoMAX eCOM“ version – a PCB terminal block, which can also be used as a removable connection (plug-in). It is even more compact and economical version with pins without a plastic housing, suitable for applications in which you don´t need all advantages of the picoMAX system.

A complete description of the whole series would require many pages of text. A better and quicker idea will provide to you the attached video, picoMAX flyer and picoMAX catalogue. 3,5mm pitch version (2091-xx) is for wire conductors 0,2-1,5 mm2/10A, 5.0mm pitch version (2092-xx) is for wire conductors 0,2-2,5 mm2/16A/250-630V. 7,5mm pitch version (2092-xx) has similar properties as the previous one, but it has a higher nominal voltage (400-1000V).

picoMAX connectors are usable literally everywhere – in a huge amount of versions will be very probably found the right ones for your application.

Small “big” connectors – Wago picoMAX – [Link]

14 Nov 2012

0.01A, 10mV but even 2A are no problem for the AxW-K series Fujitsu relay. That´s why they´re a reliable component for a linear-undistorted transfer of diverse signals.

AxW-K relay series are well-proven 2-pole relays (DPDT) reliable switching even very small signals, already from 0,01mA/10mV DC, but they won´t be scared of 1A/30VDC (0,5A/125VAC). Reliable switching is ensured by bifurcated silver-based contacts plated by gold. As, circuits for signal processing usually consist of SMD components, neither a relay intended for such applications shoudn´t be too high. With the height of only 5 mm, AxW-K relay series meet this requirement very well and a standard DIL pitch makes their usage and PCB design easier at the same time.

In the AxW-K series can be found several types – with 1.5V – 48V coils, and also bistable (latching) types (with 1 or 2 coils). Types A3W,A5W,AL-D5W-K,A12W and A24W are kept in stock, other types we´re able to provide you upon order. Further features of the AxW-K series relays result from their construction as a classic electromagnetic relay – high isolation, galvanic isolation from a control circuit, ability to transfer small signals without distortion, resistance to various surges and other. Besides telecommunication circuits, AxW-K series relays are ideal for switching of signals from a wide range of industrial detectors and sensors, audio devices and other.

Detailed information will provide you the Fujitsu AxW-K datasheet. In case of interest in any Fujitsu relay, please contact us at info@soselectronic.com

Small signal relay AxW-K won’t refuse any signal – [Link]

28 Oct 2012

The highest power density in a compact SIP package – it is the biggest contribution of TRACOPOWER TMR 6 series isolation DC/DC modules.

6 Watts is already a considerable power. However, thanks to modern technologies in a construction of switch-mode power supplies, neither such a powerful source doesn´t require to reserve a lot of space on a PCB – 2 cm2 are fully sufficient for TRACO TMR 6 na to úplne postačujú 2 cm2. In other words – from this little area a user gains an insulated regulated power supply of for example 5V/1,2A without a need for an additional cooling or other restrictions.

32 types in four voltage ranges (4,5 to 75V) provide eight fully regulated output voltages (3.3, 5.0, 9.0, 12, 15, ±5.0, ±12 and ±15 VDC). For a given application it is only necessary to choose an appropriate type for a required input / output voltage and TMR6 will ensure a reliable regulation even at high changes of input voltage (max. 0,2% output drift at VINMIN to VINMAX). As we are already used to at the Traco Power mark, DC/DC modules are constructed for a continuous operation in industrial environment. They are able to operate in a range of temperatures of -40 to +65°C (without power derating)and they resist to an indefinite short circuit. TMR 6 can be controlled remotely, what decreases its power consumption in a no-load condition and enables a remote switching on/ off of target devices at the same time.

Detailed information will provide you the TMR 6 datasheet.

Guide price is approx. 15 Eur/pce (depending on quantity), MOQ starts already from 1 piece.

6 Watts compressed into a SIP package – TRACO TMR 6 – [Link]

22 Oct 2012

Miniature PCB connectors from company Phoenix Contact bring a surprisingly simple manipulation and they occupy only a minimum of space.

Small dimensions, reliable contact, simple usage and up to 6A current are main properties of new Phoenix Contact connectors PTSM, PTPM and PTQ series from the Combicon HD family. Especially at high-volume production batches it is very important to reach a fast and precise cables assembly – and if possible – resistant to mistakes arising from lower attention of workers. New connectors meet these requirements very well and for example th PTQ series requires only to push in an insulated wire and close the lever (upper portion of the connector).

Four new series, which can be found in our portfolio are:

PTPM – (PTPM-x/x-P-2,5) a miniature, only 5mm high wire-to-board connector, consisting of 2 parts (socket + header). PTPM connects wires without stripping an insulation (IDC). It is ideal for Ethernet cables and other wires of 0.14/0.34 mm2 (AWG 22-26) diameter – depending on a type. Maximum current 2-4A/160V, 2.5 mm pitch. Number of poles is always even (2-4-6-8-10).

PTSM – a connector similar to PTPM series, but the cable termination is screwless (push-in) via a spring contact. That enables to use up to 0,75 mm2 conductors – solid but also stranded wires.

PTSM – (PTSM -x/x-2,5-H, resp PTSM-x/x-2,5-V) terminals for a direct connection of wire conductors to a PCB (THT and SMT version).

PTQ – IDC wire-to-board connector for extremely simple connection of wires to a PCB. All that is necessary is to push in an Ethernet cable or other 0.14/0.34 mm2 cable and to close the lever (upper portion of the connector – without stripping an insulation, without cutting and without any tools. No tools are necessary even to release the wire – only open the actuation lever. Maximum current up to 4A/160V, 2.5 mm pitch, 8mm height.

Plug-in connectors of PTPM and PTSM series use the same headers (PTSM-x/x-HH-2,5, resp PTSM-x/x-HV-2,5), what further increases their variability. Headers are available in THT as well as SMT versions (horizontal and also vertical). These new miniature connectors are universally usable for power supply, data and analog signals, connection of LED panels and other. All 4 series are being supplied in tapes (TR) enabling a machine insertion to a PCB.

Detailed description will provide you the overview of Phoenix PTSM and PTPM and Phoenix PTQ series, as well as datasheets at particular types. Many versions can be found directly in our stock, in case of interest in non-stock types, please contact us at info@soselectronic.com.

Don’t you want to solder leads to PCBs anymore? Mini PCB connectors will solve it – [Link]

22 Oct 2012

The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples. For full range accuracies and other thermocouple types, see the Thermal Characteristics specifications in the full data sheet.

MAX31855 – Cold-Junction Compensated Thermocouple-to-Digital Converter – [Link]

17 Oct 2012

If we want to obtain a 5V voltage from only 2 NiMH batteries, we´ll face the fact, that the most of common DC/DC circuits doesn´t operate at such a low voltage. LT1304 controller belongs among circuits, which handle this situation without problems and it also provides several extra things.

To obtain 3.3 or 5V from a lower voltage is a typical requirement at battery-powered or portable devices. Naturally, to obtain 5V it is also possible to use 4-5 NiMH cells or 2 Li-Po cells, but then the device is uselessly bigger, heavier and more expensive. The solution is just the usage of a suitable step-up circuit. LT1304 from Linear Technology belongs to “MicroPower” DC/DC step-up circuits operating already from a very small voltage, 1.5V typically. 

Thanks to a very low power consumption (10uA/Shutdown) and a built-in independent low battery detector, it is optimized for usage with batteries. LT1304 needs for its operation only a few external components – 2 capacitors, 1 inductor and 1 diode is all that is necessary to create an operating DC/DC circuit.
LT1304 is available in 3 versions – LT1304VCS8-5, LT1304CS8-3,3 with fixed voltages and LT1304CS8 with adjustable output. Versions with fixed output voltages don´t need a divider in a feedback, what further simplifies a circuit.

Read the rest of this entry »

15 Oct 2012

New multicore DSP devices from the French firm Kalray aim to surpass FPGAs in compute-intensive tasks, such as image and signal processing, 3D augmented reality and industrial automation. The company recently demonstrated the MPPA-256, the first member of their MPPA Manycore family of processors, at CEATEC Japan.

The MPPA-256 is organized as an array of 16 clusters of 16 cores interconnected by a high-bandwidth on-chip network. The proprietary cores are based on a VLIW low-power design and integrate a 32-/64-bit floating point unit. The cores of each cluster share memory, network interfaces, a debug support unit and control logic.

The demo applications at CEATEC include H.264 video encoding of a live 1080p stream from a source with a Serial Digital Interface (SDI), using a parallel implementation of the x264 open-source encoder, an industrial automation demo featuring a set of 17 Programmable Logic Controllers (PLC) running independently and concurrently on the same chip, and a passive sonar application demonstrating the capabilities of the MPPA-256 for complex signal processing tasks. [via]

Massively Parallel DSPs Challenge FPGAs – [Link]

6 Oct 2012

The LTM2883 is a 6-channel SPI/Digital or I2C digital μModule isolator with triple rail regulated power for 3.3V and 5V systems. In industrial systems applications, ground potentials can vary widely, often exceeding the tolerable range, which can interrupt communications or even destroy components. The LTM2883 breaks ground loops by electrically separating communications signals, isolating the logic level interface on each side of an internal inductive isolation barrier that withstands a very large common-mode voltage range up to 2,500VRMS. The LTM2883’s low EMI isolated DC-DC converter powers the communications interface and provides adjustable 5V, +12.5V, and -12.5V supply outputs, ideal for powering data converters in data acquisition systems. With 2,500VRMS of galvanic isolation, onboard secondary power and a communications interface operating at up to 20Mbps, the LTM2883 requires no external components and provides a simple μModule solution for isolated data communications.

LTM2883 – SPI/Digital or I2C μModule Isolator with Adjustable Regulated Power – [Link]

5 Oct 2012

BF245, a JFET transistor produced for many decades by several companies, has joined the list of discontinued components. However an equivalent replacement exists in an SMT package and its name is BF545.

BF245 in a TO-92 package has been one of the first transistors, which were mass-used. That’s why it’s no wonder, that the BF 245 is nowadays familiar to every experienced technician. As a transistor with a very high input resistance (tens of MOhm) and a relativlely low noise, it’s gained a global popularity and served to many beginning technicians at an assembly of their first radio-receivers. There are many other FET transistors on the market nowadays, thus the usage of BF245 is substantially smaller. Moreover, a majority of electronics is produced with SMT components, what probably was one of more reasons why all main producers have discontinued the BF245.

However, BF245 is still an interesting transistor, that’s why it will be henceforward available in a SOT23 SMT package as the BF545. It is available in 3 groups A, B, C – sorted according to IDSS at VGS=0. Directly from our stock are available BF545A, BF545B and BF545C from company NXP (originally Philips). Detailed information can be found in the BF545 datasheet, as well as in the RF Manual document.

BF245 – the legend is leaving, the successor comes – [Link]





Search Site | Advertising | Contact Us
Elektrotekno.com | Free Schematics Search Engine | Electronic Kits