Additional Power Supply for USB Devices

Much the use of USB devices today, sometimes cause lack of power problem. How to know the maximum current that can be obtained from a single USB connector is limited to 500 mA. If your device requires more current, then it must involve an additional one USB connector, which maybe not  available. This problem can be solved by an additional instrument to use an external unregulated power and convert it to 5 Volt.

You can use two different approaches. You can use two different approaches. the first and perhaps easiest – is to use a simple linear regulator, but this raises other problems – wasteful spending power, but you can go the other way and use a pulse transformer, which is more economical.

Note : The basis of the converter is a PWM controller based on integrated circuits LM 2575-5, having the output of 5 volts with a current up to 1A. To enable / disable the converter  uses pin 5 On / Off , controlled transistor VT 1.

psu

Share
Published by
psu

Recent Posts

Universal Battery Charger for Charging up to 18V Cell

This universal battery charger has regulated output voltage which can be adjusted as you need.…

5 years ago

Auto Switch-Off Power Supply (Variable Output 3.7V to 8.7V)

Here is the auto switch-off power supply which will turn off itself when there is…

6 years ago

High Voltage, Low Current Power Supply (2000VDC from 15VDC)

This is a high voltage, low current power supply capable to deliver 2000VDC output from…

6 years ago

15V 1A Regulated Symmetrical Power Supply

This is the easy built 15V 1A regulated symmetrical power supply capable to deliver stabilized…

7 years ago

12V / 3A Regulated Power Supply

Here we provide a powerful 12V / 3A regulated power supply circuit. Of course the…

7 years ago

How To Repair Computer Power Supply

If the power supply is damaged or does not work, the computer also will not…

7 years ago