You meet them every day without knowing that those are Friwo. However world-class producers know why they use them…
Friwo power supplies guarantee top-level specification and reliability, what can help you to gain and keep customers and a good reputation. To have a trust of customers is usually the most important factor influencing whether you will sell your product or not. And trust of customers is usually built on a reliability of a device…
Nowadays, when a device with almost the same functionality can be bought from several producers, the success or fail on the market is in the hands of seeming trifles. Naturally, there´s often a pressure on a very low price, but hand in hand with this requirement, everyone also wants a reliability.
Designers of electronic devices know, that a device with the same functionality can be designed in two basic ways:
1) in a way that it worked on the edge of its possibilities (weakly dimensioned components, slower semiconductors with higher losses, …). Such a device operates at “usual circumstances” properly, only maybe generating a little more heat (lower efficiency). The problem is usually a lower lifetime and a much higher susceptibility to overvoltages in mains line, disturbances, higher or very low temperatures etc.
2) or in a way that it worked with a reserve even in not always ideal conditions (temperature, voltage spikes, ….) even for a price of slightly higher production costs.
It´s obvious, that a device designed by a “pattern no. 2” provides far higher assumption of a reliable operation without claims, service events or a loss of a good reputation. Friwo as the biggest and the only European producer of power supplies in a given range wagered on quality and no wonder, that it´s the first choice of many renowned producers like Bosch, Metabo, Makita, Braun, Siemens medical, Porsche, Geberit, Sagem,…. If you didn´t meet a mark Friwo yet, it may be because Friwo is first of all the OEM producer and almost everyone of us daily uses some product with a Friwo power supply, without knowing it.
On stock we keep a selected range of adapters, but much more important is the fact, that we´re able to provide you any power supply from Friwo and upon order it´s also possible to produce a power supply exactly according to your demands. Friwo disposes with many production capacities, like laser trimming enabling a flexible adjustment of specification. An image about the Friwo power supplies will give you the document Friwo company profile as well as our article „Your devices will fall in love with premium power supplies Friwo”.
In case of interest, please contact us at firstname.lastname@example.org.
Do you divine where everywhere Friwo adapters and power supplies are used? – [Link]
Dave gives his initial impression on the Rigol DP832 triple output 195W lab power supply.
EEVblog #509 – Rigol DP832 Lab Power Supply - [Link]
15W toroidal transformer with a very low radiated magnetic field and high efficiency is an excellent choice for audio and other sensitive devices.
In our stable stock offer can be from now found a quality small transformer 70053K from company Talema meeting even high requirements for supplying of sensitive devices. Switch mode power supplies are an excellent choice for the most of applications, but for supplying of input stages of audio and video devices as well as various measuring devices, AD converters, … it´s still the best choice a classic transformer. And if it has to be a transformer, then the one with as good specification as possible.
From this point of view, toroidal transformers a are a step in front of transformers laminated from EI, C and similar plates. A uniform layout of primary and secondary winding along the magnetic core of the toroid ensures an excellent magnetic coupling between windings a very low strayfield, which could influence surrounded components in a device.
Transformers from company Talema are top quality products meeting stringent requirements for safety, reliability and low losses. Type 70053K with the 2x15V output (2×18,5V open circuit) is ideal for supplying of audio and other devices requiring +-15V symmetrical voltage. At lower current demands, it is also suitable for +-18V output, as an AC voltage will get increased after rectification and filtering at capacitors.
The transformer has a double primary winding, thus being able to operate at 115 or 230V (i.e. in European conditions the windings have to be connected in series). A big advantage is that secondary windings are separated, and so they can be connected even in parallel in order to gain a higher current in cases when we only need a single supply. Application of the transformer is very simple – by soldering pins into a PCB. The transformer also features a blind plastic nut M4x6 for increasing of mechanical stability.
A transformer suitable even for mimosas - [Link]
by Publitek European Editors:
With the proliferation of high-brightness LEDs designed to provide replacement lamps for commercial and domestic lighting there comes an equal, if not greater, proliferation of power supply solutions. With hundreds of products from dozens of manufacturers, it becomes a question of how to make sense of all the permutations of input / output voltages and output current / power ratings, to say nothing of the mechanical dimensions / termination types and the many other features for dimming, remote control, and circuit protection that are offered. This article aims to unravel the mysteries of the different types of LED power supplies and how they operate in order to ease the selection process.
How to Choose the Right Power Supply for Your LED Lighting Project - [Link]
manekinen @ mdiy.pl builds a simple symmetrical power supply based on LM317 and LM337. Design is Eagle and includes PCB so you can build it your own.
This time, simple project that i made from simple need. Simple, cheap and functional regulated power supply 1,25V to 15V, two separately regulated positive lines and two negative. This power supply uses LM317 and LM337 integrated circuit stabilizers – or their stronger versions. Galvanically separated lines can be connected in various configurations.
1.25V to 15V Simple Dual Symmetrical Power Supply - [Link]
by Ashok Bindra:
Whether for driving white LED backlights or powering RF and analog circuits, laptops, tablets and other mobile devices often require voltages that are much higher than the input supply voltage. Consequently, step-up or boost DC/DC converters generate output voltages that are several times the input to serve a variety of circuits and functions in these systems. For instance, in battery powered systems, the input normally is 5 V and below, while voltages as high as 15 and 24 V or more are needed to power RF/analog functions or drive thin-film transistor (TFT) liquid crystal displays (LCDs). Similarly, high voltages also are needed to bias avalanche photodiodes (APDs) found in optical receivers.
Generating High DC Output Voltage from Low Input Supply - [Link]
Dusan Ponikvar writes:
Contemporary power supplies use switching techniques to achieve the desired output voltage from the primary source. Switching power supplies, however, are often too noisy to be used in sensitive analog circuits. You may find linear power supplies to be preferable in these cases.
A standard practice for a linear voltage regulator is shown in Figure 1. A higher-than-desired, unstable voltage is connected to the input, VIN, and the series-pass transistor, Q1, reduces the voltage to the desired level at output VOUT. An error amplifier, IC1, compares a fraction of VOUT with a reference voltage, VR, and controls Q1 to keep the output fixed regardless of the load current, IOUT, and variations of VIN. Such a circuit is suitable only for a small range of output voltages.
Regulate a 0 to 500V, 10-mA power supply in a different way - [Link]
This is an over-current and over-temperature protection circuit for power supplies. The circuit cuts power in case one of these two events happen, it also has an external shutdown pin so the supply can be controlled by a switch or microcontroller. [via]
When it is necessary to plug in a board into a system that is currently powered, it is critical to control the inrush current to prevent damage/system fault conditions. This application provides a simple circuit to achieve this function as well as an easy method for resetting the system and monitoring against temperature issues.
Power supply over-current and over-temperature protection - [Link]
I’ve recently become interested in Nixie tubes. Nixie tubes are neon filled glass tubes that contain cathodes in various shapes, numbers being the most common, and a mesh anode. Passing a current through the cathode causes the neon gas to ionize which makes it light up.
The problem with these tubes is that they voltages of around 170V in order to ionize the gas. Fortunately, most tubes only need a few mA which makes the supply design simpler and easy to run off a wall wart.
A low cost Nixie Tube Power Supply - [Link]
Online Voting Open for Readers through December 31, 2012
Miami, Florida, December 6, 2012 – T&M Atlantic today announced that Test & Measurement World has named power supplies AKTAKOM APS-73xxL series as a finalist in the Best in Test Awards competition. The awards recognize the best in test products and test professionals.
The Best in Test Product Awards honour important and innovative new products and services in the electronics test and measurement industry. Products from all areas of electronics testing and inspection are eligible. The annual Test of Time Award is presented to a product that continues to provide state-of-the-art service more than five years after its introduction. The Test Engineer of the Year Award pays tribute to the important contributions test engineers make to the quality of electronics components, products and systems. The award winner receives a $10,000 educational grant, courtesy of sponsor National Instruments, which is presented to an engineering school designated by the winner.
AKTAKOM APS-73xxL series of single-channel programmable power supplies have 3 LED displays, output voltage of 0…30 V, output current of 0…3 A (APS-7303L) or 0…5 A (APS-7305L), overheat protection and current and voltage stabilization mode. Read the rest of this entry »