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PETH-1074.php   5585 Bytes    21-10-2015 08:38:27


PETH-1074


A small power supply for universal use.



This project describes a little power supply, based on a LT1074, adjusteable from 2.5 to 50 V, delivering much more than 1 Amp. Yet another nice to have building block :-)

Features
• Output 2.5 to 50 VDC @ 3 A regulated low ripple DC voltage
• Onboard potentiometer for output voltage adjust
• Onboard bridge rectifier for AC voltage input
• Screw Terminal connectors for input and output
• Four mounting holes of 3.2 mm each
• PCB dimensions 52 mm x 45 mm


PETH-1074, LT1074

The PETH-1074 power supply - small and useful ...





✈ Circuit




The circuit consists of a bridge rectifier, build with 4 diodes (1N5062), then a storage capacitor 2200 µF, 35V (may be changed), an LT1074 and a 47 µH inductor. An SB560 schottky diode was used. The circuit is not that new or stupendous, but it is a handy circuit which should be in every library of building blocks. Designed for educational purposes.




✈ Downloads








✈ Performance




In order to test the performance, we built some of those circuits. We used the following equipment : LD-300 DC ELECTRONIC LOAD BY TTI, FLUKE 8846 A to do the measurements. One voltage which is very often used is +5 V. The diagramm below shows the measured characteristic.

PETH-1074 Kennlinie

PETH-1074 Step Response

Step Response when current is increased from 500 mA to 3000 mA. When dissipating a lot of power, a heatsink mayst be adviseable. The region with the higher ripple corresponds to the higher current.




✈ Share your thoughts


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t1 = 3943 d

t2 = 801 ms

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