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Thread: "TO-247" First Project - 600W SMPS"

  1. #1

    Post "TO-247" First Project - 600W SMPS"

    Hi

    i'm going to start my first audio smps.i want use it for my Nmos200 :

    http://www.diysmps.com/forums/showth...2-Pair-Edition

    +/-40v 5A 2X200W@2Ohm - 600W max power consumption = +/-40v 7.5A per rail

    i was read this thread :

    http://www.diysmps.com/forums/showth...icrosiM-design)


    now i'm confused

    i don't know which circuit is suitable for me !

    IR2153 or IR2110+SG3525

    it's because at first , ludo built the ir2153 based circuit but in newer version , he was build 3525+2110 based circuit and result was more reliable.

    can anyone help me about this issues ?

    there is the latest version of Ludo's IR2110+SG3525 based circuit , please tell me about it , it's OK ?
    Attached Images Attached Images
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

  2. #2
    Last version of ludo`s SMPS is working fine, and it will save you time

    If you decided to make it, post every step here, to save your time later

    Thanks
    www.diysmps.com & www.Micro-Audio.com

  3. #3
    My SMPS schematic is ready !
    it's Ver.0

    please download and tell me about it , what you think ? it's Good and reliable ?
    it's like Ludo's last design , but somethings changed.
    Last edited by TO-247; 06-29-2011 at 11:14 PM. Reason: Edit pdf file
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

  4. #4
    Cool


    It looks Good

    Make sure to review it before making PCB. just to prevent any mistake.

    Other wise, very nice schematic!
    www.diysmps.com & www.Micro-Audio.com

  5. #5
    Thanks MicrosiM

    But i think that schematic have a lot of problems :

    - the output voltage not adjustable , what you think ?

    - the Snubber circuit behind the mosfets (5R6+330pf) , it's a copy from QSC PLX1802 Schematic ! it's ok for this circuit ? that circuit use IGBT and worked in resonant mode.

    - what about current sense inductor ? 15uh is ok ? please tell me about winding and core specs.

    - main transformer was calculated based on excel file and you can download 80V design on the attachment. i got minimum voltage of the 220v line around 200v , then 200v X 1.41= 282v/2 = 140v , you can see another parameters on excel file.

    - on current limit circuit , how much is the P1 ?

    - the output inductor maybe in wrong place , it's must be after the rectifier , also i don't know the good specs for that.

    I'm sorry for asking too meny questions
    Attached Files Attached Files
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

  6. #6
    --------------------------
    Thanks MicrosiM

    But i think that schematic have a lot of problems :

    - the output voltage not adjustable , what you think ?

    For audio application, you dont need regulated SMPS.

    - the Snubber circuit behind the mosfets (5R6+330pf) , it's a copy from QSC PLX1802 Schematic ! it's ok for this circuit ? that circuit use IGBT and worked in resonant mode.

    Your snubbers are OK, whats the problem if you take info from other designs?

    - what about current sense inductor ? 15uh is ok ? please tell me about winding and core specs.
    Current sensor will be try and error at the first, that value is just OK as a start

    - main transformer was calculated based on excel file and you can download 80V design on the attachment. i got minimum voltage of the 220v line around 200v , then 200v X 1.41= 282v/2 = 140v , you can see another parameters on excel file.

    If you have followed the formula, your transformer will work.

    - on current limit circuit , how much is the P1 ?

    P1 value, start with 50K

    - the output inductor maybe in wrong place , it's must be after the rectifier , also i don't know the good specs for that.

    No need for those output inductors, since its not a REGULATED SMPS

    I'm sorry for asking too meny questions
    --------------------

    * Calculations for transformer is OK

    Dont forget

    Making this SMPS from scratch, like in your case, will need things to be done right

    I advice you to ask about every thing.

    Good Luck!
    www.diysmps.com & www.Micro-Audio.com

  7. #7
    Thanks for quick replay

    Your snubbers are OK, whats the problem if you take info from other designs?
    i think that design may not work good in my design , but it's good choice for me.

    If you have followed the formula, your transformer will work.
    the value of paralleled wires are ok ? the current of secondary is about 7.5A at maximum , 15X0.1mm will be ok ?

    Dont forget

    Making this SMPS from scratch, like in your case, will need things to be done right

    I advice you to ask about every thing.
    don't worry it's not my first 220v smps , i have made 100w 18v smps about 1 years ago , but design based on pi-expert.

    i'm also download very useful pdf files from this forum to learning about construction , winding , calculation and many other things , thank you for supporting "DIYSMPS"

    what's your opinion about 16v 0.5A auxiliary smps ? i want to design and replace it for pcb transformer.

    anyway , i think designing this PCB will be difficult

    i'm also going to buy Rigol 100mhz Scope and X100 Probe , also isolation transformer

    - the schematic at version 0.1 also available , but i'm not grantee the operation of this circuit before testing it.
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

  8. #8
    1- The parallel wires are OK.

    2- 16v 0.5A auxiliary transformer is OK

    This circuit is already working, but SMPS needs a try before making the final design, ludo made 4 prototypes before the final version.
    www.diysmps.com & www.Micro-Audio.com

  9. #9
    How Can I Get +/-24v (For Eq,Protectors,Fans,Etc.) on this smps ?

    if the voltage per turn = 7.78 , then for 24v = 3Turn + 16v = 2Turn = 40v 5Turn

    is this schematic true ? can i use this method ?
    Attached Files Attached Files
    Last edited by TO-247; 06-30-2011 at 02:53 PM. Reason: add last Schematic
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

  10. #10
    Quote Originally Posted by TO-247 View Post
    How Can I Get +/-24v (For Eq,Protectors,Fans,Etc.) on this smps ?

    if the voltage per turn = 7.78 , then for 24v = 3Turn + 16v = 2Turn = 40v 5Turn

    is this schematic true ? can i use this method ?
    Can anyone help me ?
    "DIYSMPS"
    DANGER ! HV AROUND , DEATH is PERMANENT

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