Panel switch wiring

Showing posts with label 3v. Show all posts

Tuesday, September 2, 2014

LM2576 ADJ 3V 3A Switching Regulator Circuit

I build this project when I have a problem to driver stepping motor that draw current 3A at 3V.After search the infomation on the internet I have found LM2576-ADJ which is an adjustable output version of 3A Step-Down Voltage switching Regulator and capable of driving 3A load with excellent line and load regulation. You can change R1 and R2 for your desired output voltage.In my design I use the schema from the example schema in data sheet and it works fine.

Saturday, August 16, 2014

0 to 3V Adjustable Output Power Supply

This is an LM317 based adjustable voltage regulator with a maximum output of 3V and 1.5A. The output voltage depends on the V_IN, R1 and R2 values, so the schema can be modified to use with a maximum output of greater than 3V. The maximum current output is also independent of the schema design, it is related to the package options. In this schema, LM317T, which is capable of transferring up to 1.5A, is used.

Since the internal reference voltage of the LM317 regulator is 1.25V, the output voltage can be also minimally 1.25V. One way to overcome this problem is using a reference voltage source built on two diodes. But this approach is mostly suitable for 1.5V to 15V regulators since the sensitivity becomes poor for the low voltage outputs less than 1.5 . On the other hand, diodes have temperature dependent forward voltages.

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