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30 Sep 2014

minipsu1

by sebulli.com:

Very small power supply unit in the size of a cigarette box. The input voltage is 24V. Its supplied by a external switch mode AC/DC PSU. The output voltage range is 0V to 24V at 0A to 3A. A switch mode preregulator reduces the power loss. This allows a very compact design. Voltage and current are displayed on a RGB OLED display

Miniatur Power Supply Unit with 0..24V and 0..3A - [Link]

29 Sep 2014

obr1589_1

Programme of webinar:

Linear Technology’s family of DC/DC Module products simplifies your analog design. By integrating the DC/DC controller, power switches, magnetic, and a modest amount of capacitance, uModules power products will save precious space on the PCB and reduce the solution weight, development time, BOM qualification and procurement effort.

  • Product groups and parameter ranges
  • uModule construction
  • Reliability data
  • Features: ultralow noise, output sharing, synchronizability / multi-phase operation
  • Information resources
  • Applications examples.
  • Q&A

SOS Webinar – Your way to simple and efficient power supply design with Linear Technology - [Link]

27 Sep 2014

MAX668

IP phones require data and power on the same cable. A high voltage power source of 48V is required, to reduce the voltage drop in the cable. This project has a DC-DC step-up converter that can deliver the required 48V supply at high efficiency. The MAX668 is an excellent choice for the design of this DC-DC step-up converter. The MAX668, a current-mode controller, operates in the PWM mode at medium and heavy loads, providing high-efficiency and low-noise. With power levels greater than 20W, efficiencies of more than 90% are achievable.

MAX668 48V IP Phone Power Supply – [Link]

24 Sep 2014

F2OC7GVHTN0V4UG.MEDIUM

by newtonn2 @ instructables.com:

This is a small bench power supply that I made some time ago, and because I was very busy I couldn’t do the instructable for it. I do apologise for taking so long, I hope it was worth the wait :).

After making my Mini Adjustable Power Supply I was very happy with it, but I was missing a more accurate control of the voltage and current. So I decided to make this slightly bigger (but still small) bench power supply.

[via]

DIY Small Bench Power Supply - [Link]


22 Sep 2014

How boost converters work and how to build a 50W adjustable boost converter circuit.

DC-DC Boost converter tutorial - [Link]

16 Sep 2014

obr1582_1

Fifteen types, three sizes and three strong features – these are the new DIN-rail power supplies Uno Power from company Phoenix Contact.

To be on the top in a segment of power supplies nowadays means above all high efficiency, low power consumption without a load (Standby) and compact dimensions. New series Uno Power from company Phoenix Contact meets all the most important requirements expected from a good power supply and gives a guarantee of a precise construction known from components from Phoenix Contact at the same time.

Main benefits:

  • high efficiency over 90% at full load
  • very low standby losses below 0.3W
  • compact dimensions and low construction height only 84 mm enables easy assembly into favorite 120mm installation boxes.
  • 15 types with output power of 25-100W, single output (5, 12, 15, 24 a 48VDC)
  • MTBF > 500 000 hrs

Uno Power are available in three sizes – in a width of 22.5/ 35/ 55mm x 90 x 84mm (wxhxd). High efficiency at maintaining compact dimensions results into a high energy density. In praxis it means that for example the 60W type is only 35mm wide.

Uno Power series is marked as „basic“, i.e. doesn´t provide various extra functionality, but on the other hand it provides everything necessary for majority of applications while maintaining an affordable price. Uno power is able to work with a global input voltage range 85-264VAC and is also suitable for applications outside (in a suitable box) – thanks to a guaranteed functionality already from -25°C.
Two 90W types are also certified according to UL1310/508 class 2, while the 2-phase type (24VDC/90W) is suitable for places, where only a higher input voltage is available (264-575 Vac).

Further information can be found in the Phoenix Uno Power flyer and in datasheets at particular types. Another power supplies and UPS can be found in the Phoenix Contact power supplies catalogue.

Power supplies Phoenix Uno Power – yes for three times - [Link]

13 Sep 2014

by mjlorton @ youtube:

I go through the design and operation of the college power supply project. There is one minor error that still needs to be corrected but I think we are very close to a final design.

DIY Bench Power Supply #5 – Circuit Design and Operation - [Link]

31 Aug 2014

Step_Up_DC-DC_photo_th

This project has been designed around Texas Instrument’s LM2623 IC, The LM2623 is a high efficiency, general purpose step-up DC-DC switching regulator for battery powered and low input voltage systems. It accepts an input voltage between 2.4V to 12V volts and coverts it into 5V DC. Efficiencies up to 90% are achievable with the LM2623.

2.4V to 5V Step Up DC-DC Converter - [Link]

23 Aug 2014

by Afrotechmods:

I explain buck converters (a type of switch mode power supply) and how to build a 5V 5A power supply using an LM2678.

How to build a switch mode power supply! DC-DC buck converter tutorial! - [Link]

1 Aug 2014

psudig_sch_1-600x423

Bertho posted a digitally controlled PSU design in the forum. He writes:

The design is for 0…30V and 0…3A (90W) controllable at ~1mV and ~0.1mA steps. The actual accuracy is still out for testing and I assume that noise and non-linearity will be a factor to look at when time comes. The basic design allows for 0…42V (max 45V) and (at least) 0…4A, but then all the components should be re-calculated to match such setup. Also, some components need to be voltage matched for a higher input voltage.
The design is a dual control-loop where the first stage is a switching PSU which is fed back to assure a 2.5V drop over the secondary analog control stage. The secondary stage is also responsible for the current limiter. The idea here is to reduce the power loss in the BJT (Q4) in the analog stage.

[via]

Digitally controlled bench PSU - [Link]



 
 
 

 

 

 

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