+ Post New Thread
Results 1 to 7 of 7
  1. #1
    Newbie level 3
    Points: 1,536, Level: 8

    Join Date
    Jul 2004
    Posts
    3
    Helped
    0 / 0
    Points
    1,536
    Level
    8

    difference between choppers and regulators

    Hi,

    was just wondering what the difference(s) is/are between DC voltage regulators and DC chopper circuits? Does the latter provide isolation in a DC environment, much like transformers in an AC one? More info/links would be much appreciated.

    Thanks all,
    FK

    •   Alt3rd July 2004, 13:53

      advertising

        
       

  2. #2
    Member level 2
    Points: 2,051, Level: 10
    mcoster's Avatar
    Join Date
    Jan 2004
    Posts
    51
    Helped
    6 / 6
    Points
    2,051
    Level
    10

    how to make a dc regulators

    The main differences are:

    DC regulator : It's function is to make a stable DC voltage on its output while it's input has some ripple. You use one when you want, for instance, 5V output but your input swings a little above 5 V (not stable). Usually, regulators need its input voltage to be a little above its output voltage becouse of loss problems.

    DC converter : Basically there are two types, BUCK convertor the steps down a dc voltage and BOOST convertor that steps up a dc voltage. Both of then uses a inductor energy and a switching device (like a FET transistor) to achieve this step down or step up property.
    The amount of step up or step down on the voltage mainly depends on the switching time of the circuit.
    You can easilly find how this kind of convertors work by checking out power electronics books. On this books you will find how to analyze them and how to calculate its components values.

    I am also posting a schematic of the above DC-DC converter.
    Hope i could help you.
    mcoster



    •   Alt3rd July 2004, 14:35

      advertising

        
       

  3. #3
    Newbie level 3
    Points: 1,536, Level: 8

    Join Date
    Jul 2004
    Posts
    3
    Helped
    0 / 0
    Points
    1,536
    Level
    8

    difference between regulator and dc-dc

    Hey there...

    Thanks for the reply.

    Yeah, that's what I thought until I realised, looking at my schematics, that there are voltage regulators out there that are able to output say, 5V from an input of say, around 12V or something.

    Something I know that's also different is the implementation of a chopper and a regulator is the complexity of the circuits. What I'm thinking is that if it's so much more difficult (usually) to design a chopper because of the number of components involved, why bother? One could always just take the easy route with a regulator right?

    Regards,
    FK



    •   Alt3rd July 2004, 18:46

      advertising

        
       

  4. #4
    Full Member level 3
    Points: 3,841, Level: 14
    R00KIE's Avatar
    Join Date
    Jan 2003
    Location
    Portugal
    Posts
    150
    Helped
    21 / 21
    Points
    3,841
    Level
    14

    difference between dc dc converter and regulator

    Depends, regulators ususally have a lower efficiency that DC-DC converters, for simple low current and a low difference between input voltage and output voltage the regulator does the job, at least for me because it's just one part, but if you have high currents and a high difference between viltages the DC-DC converter is a must



  5. #5
    Member level 2
    Points: 2,051, Level: 10
    mcoster's Avatar
    Join Date
    Jan 2004
    Posts
    51
    Helped
    6 / 6
    Points
    2,051
    Level
    10

    difference between regulator and dc-dc converter

    I agree with ROOKIE.

    If you just want to make a thing that has low current with small voltage drop and don´t need to be power efficient you can allways use a voltage regulator. There are plenty on the market that does a nice job (LM317, 78XX).

    If you want to reduce 12V to 5V with a maximum current of 1.5 A you can use 7805.

    That's it
    mcoster



  6. #6
    Full Member level 4
    Points: 2,850, Level: 12
    delay's Avatar
    Join Date
    Jun 2004
    Location
    Van Allen Belt
    Posts
    207
    Helped
    5 / 5
    Points
    2,850
    Level
    12

    types of dc-dc chopper

    DC-DC converter is just a fancy name for a voltage regulator with high efficiency and regulation.



  7. #7
    Full Member level 1
    Points: 2,062, Level: 10

    Join Date
    Jul 2004
    Location
    San Antonio, TX
    Posts
    101
    Helped
    0 / 0
    Points
    2,062
    Level
    10

    Re: Diff. between DC regulators and DC-DC converters (choppe

    There is a lot of difference between a regulator and a converter. There are switching and linear regulators while there are switching and linear power supplies. A DC DC convertor is a switching power supply.



+ Post New Thread
Please login