- #1
mohamen
- 8
- 0
i need help in making of smps power supply...i have the circuit of smps circuit...how can i practically implement this circuit...please help...
Make a SMPS Power Supply - Get Help Now!
- Thread starter mohamen
- Start date
-
- Tags
- Power Power supply Smps Supply
Click For Summary
Discussion Overview
The discussion revolves around the construction of a switch-mode power supply (SMPS), specifically focusing on practical implementation, circuit design, and safety considerations. Participants share their experiences and seek advice on various aspects of building an SMPS that converts 220V AC to 30V DC at 2A.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
- Homework-related
Main Points Raised
- One participant requests help with implementing an SMPS circuit they have.
- Another participant asks for clarification on the type of power supply being discussed, including specifications like power level and experience with high-voltage AC circuits.
- A participant specifies the desired output of 30V DC at 2A from a 220V AC input.
- Concerns are raised about safety when working with AC mains, including the importance of using an isolation transformer and understanding safety regulations.
- Advice is given to work with lower voltages and currents for safety, along with tips on handling AC power sources to avoid electrocution.
- Multiple requests for SMPS circuit diagrams are made, with one participant mentioning they are designing a circuit using the TL949 component.
- Suggestions are made to consult datasheets and online resources for further information on SMPS design.
- One participant expresses difficulty in researching due to being a beginner and asks about instructional help available for their learning process.
- Another participant suggests looking for online tutorials on switch-mode power supply design as a way to get started.
Areas of Agreement / Disagreement
Participants express varying levels of experience and knowledge regarding SMPS construction, with some emphasizing safety and foundational knowledge while others seek specific circuit designs. No consensus is reached on the best approach or resources for beginners.
Contextual Notes
Participants highlight the importance of safety when working with high-voltage circuits, but there is no agreement on specific safety regulations or practices that should be followed. The discussion also reflects a range of expertise among participants, from novices to those with more experience.
Who May Find This Useful
This discussion may be useful for individuals interested in building SMPS circuits, particularly beginners seeking guidance on safety and design resources.
- #2
berkeman
Admin
- 69,480
- 25,008
What kind of power supply are you talking about here? Do you mean like a National Semiconductor "Simple Switcher" DC-DC converter? Or do you mean a full-blown off-line SMPS? What power level? What input and output voltage and current specs? Do you have experience working with off-line circuits (that involve working with the high-voltage AC Mains)?
- #3
mohamen
- 8
- 0
i want power supply having 30+30 V Transformer having 2A current which convert 220 ac to dc...this type of power supply i required ...
- #4
berkeman
Admin
- 69,480
- 25,008
So you want to build a SMPS that takes in 220Vac from the AC Mains and puts out 30Vdc at 2A?
Have you built any circuits before that connect to the AC Mains? Do you know what an Isolation Transformer is used for while you build and test your power supply? Do you know what safety regulations you need to meet in the construction of your SMPS? What are they?
If you don't know the answers to the above questions, then I think it's too early for you to be trying to build this power supply -- you're going to get yourself or somebody else hurt.
Have you built any circuits before that connect to the AC Mains? Do you know what an Isolation Transformer is used for while you build and test your power supply? Do you know what safety regulations you need to meet in the construction of your SMPS? What are they?
If you don't know the answers to the above questions, then I think it's too early for you to be trying to build this power supply -- you're going to get yourself or somebody else hurt.
- #5
KleptoPanda
- 8
- 0
Always learn and test things (when possible) with the lowest voltage (protection for your components) and with the lowest current possible (protection for you). While AC won't travel as far without a conductor (open air, etc.) as a DC of equal voltage will. (I have no source for this; if you have a reputable one and it disputes my statement, please post it as I am not sure of the validity of my own statement.) However with the penetration ability of the 110v-120v AC source it only takes 70-80 mill amperes across the heart for lethal results. This makes AC the number one cause of electrocution in the United States. If you are absolutely determined to proceed with your project I would suggest that you do it on a completely clear table or lab bench (accidental intrusions of conductors due to being knocked over in the work space happen more often than one would think). Keep your wits about you; never relax or underestimate what this sort of power source is capable of doing to your body. Follow the one hand rule; keep one hand out of places where it could complete a circuit with your other hand, even though you can still complete a circuit with just one hand, that will not provide a direct path through your heart to complete the circuit. Now, that being said DC is more dangerous however it is less likely you will be dealing with lethal amounts of DC voltage compared to AC.
Even though this may seem off topic, your post indicated that you may be a novice with AC power sources (not to mean any offense, I'm not saying anything but what my perception of your post is) and these are always good tips when working with any lethality level power source. Everyone is free to correct me (as always
).
Even though this may seem off topic, your post indicated that you may be a novice with AC power sources (not to mean any offense, I'm not saying anything but what my perception of your post is) and these are always good tips when working with any lethality level power source. Everyone is free to correct me (as always
).- #6
chuotchui84
- 4
- 0
Can you sent to me a circuit of SMPS? I need help in SMPS. I am designing a SMPS circuit using TL949. Thanks
- #7
berkeman
Admin
- 69,480
- 25,008
chuotchui84 said:
Look at the datasheet for the part, and look through the Texas Instruments website for application notes for that part and for switching power supplies in general. You can also start more research on the subject at wikipedia.org.
- #8
chuotchui84
- 4
- 0
I have referenced this page but it is difficulty to reseach because i am a beginner.
- #9
berkeman
Admin
- 69,480
- 25,008
chuotchui84 said:
Is this for a class? If so, what kind of instructional help is offered?
If you are trying to learn this on your own, there are probably some good online tutorials. I just googled switch mode power supply design tutorial, and got lots of good hits. Read through some of these on the hit list to get you started:
http://www.google.com/search?source...232&q=switchmode+power+supply+design+tutorial