Search:

Type: Posts; User: Silvio

Page 1 of 20 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    30
    Views
    354

    Tell us more about your project maybe a schematic...

    Tell us more about your project maybe a schematic will help us more to understand .
  2. Replies
    30
    Views
    354

    That is quite normal and the reason is that the...

    That is quite normal and the reason is that the high side is charged from the capacitor and not from direct dc. In circuit it would behave differently and do not worry the voltage at the high side...
  3. Replies
    30
    Views
    354

    @Bogdan 2011, With the video that I saw and...

    @Bogdan 2011,

    With the video that I saw and also the changes you have made it seems that there could be something wrong somewhere. It also could be the case that there may be a shorted turn in...
  4. Thread: SMPS Repair

    by Silvio
    Replies
    2
    Views
    37

    Hi I can see it is an smps with power factor...

    Hi I can see it is an smps with power factor correction at the input. As MicorsiM said a picture which can show the oscillator and also the pfc chip will greatly help. If you can state where this...
  5. Replies
    124
    Views
    34,115

    @ Steven Quote @ silvio what core may i use...

    @ Steven

    Quote
    @ silvio what core may i use and how many turns should i turn? i have lots of iron powder cores t130-10(black core) t130-26(white yellow core) and t130-52(blue green core)
    which...
  6. Replies
    30
    Views
    354

    This is a very basic circuit that I see. What is...

    This is a very basic circuit that I see. What is not appropriate is that the gate resistors should not be less than 22 ohms I guess 27 ohms will be better not to load unnecessarily the IR2153. You...
  7. Replies
    124
    Views
    34,115

    @ Stewin, IRFP460 may work here as the voltage...

    @ Stewin,

    IRFP460 may work here as the voltage rating (500v) though is rather close to the peak operating voltage. A mosfet rated at 600v will be a better choice. Do not forget that here spikes...
  8. Replies
    30
    Views
    354

    I am glad you managed to check them at least now...

    I am glad you managed to check them at least now you know that your chip is working well.
  9. Replies
    30
    Views
    354

    Keep in mind that the IR2153 has two totem poles...

    Keep in mind that the IR2153 has two totem poles with there output being the low side at pin 5 which should be referenced to ground and the high side being at pin 7. The high side is referenced at...
  10. Replies
    124
    Views
    34,115

    Hi steven I am not sure what he used exactly but...

    Hi steven
    I am not sure what he used exactly but make sure that the voltage rating of these mosfets be 600v or more. There are a lot of high voltage spikes in this area of the smps. The fact that...
  11. Replies
    124
    Views
    34,115

    @Davidson Regarding the CBB caps yes they are...

    @Davidson

    Regarding the CBB caps yes they are enough and can pass all the current needed. I could also have use 0.47uF if I wanted. You will find out while you read on.

    What would you say if...
  12. Replies
    5
    Views
    514

    Yes it can resonate but it depend on the value...

    Yes it can resonate but it depend on the value and the switching frequency. However in the cases shown the capacitor is there to block DC
  13. Replies
    5
    Views
    514

    @sbdada09 Please note that when using 2 bulk...

    @sbdada09

    Please note that when using 2 bulk capacitors in the input the capacitance across the 320v is half. As a rule of thumb we use 1uf per watt of power across the 320v rail.

    Fig 1 shows...
  14. Replies
    4
    Views
    696

    There exist a 3 legged chip such as the TOP...

    There exist a 3 legged chip such as the TOP family like TOP221 which is used as a flyback buck converter. I am sorry to say that a chip with that name 51LP I never heard of. I guess you will be...
  15. Replies
    4
    Views
    696

    I am not sure about this but it could be TL751LP....

    I am not sure about this but it could be TL751LP. This is a low dropout voltage regulator

    here is the link for the datasheet https://www.alldatasheet.com/datasheet-pdf/pdf/28831/TI/TL751LP.html...
  16. @sbdada09 I am sorry to say that I find the...

    @sbdada09

    I am sorry to say that I find the spacing between the mains and also the high voltage DC is not adequate. The spacing for the mains traces should be 3mm minimum and for the 320v traces...
  17. Replies
    375
    Views
    221,574

    Well as you can see from all the schematics that...

    Well as you can see from all the schematics that the pass transistor controlling the fan speed need a lot of gain in the base/gate. I guess you can use a fet instead but I am not sure how it would...
  18. Replies
    375
    Views
    221,574

    If you intend to supply the 12v from a 45v supply...

    If you intend to supply the 12v from a 45v supply there will surely be a lot of dissipation if you had to use the first circuit with 2 transistor. As you can clearly see the original supply voltage...
  19. @sbdada09, You can find the pdf in page 11 post...

    @sbdada09,
    You can find the pdf in page 11 post #13

    Link https://www.diysmps.com/forums/showthread.php?897-Audio-smps-700w-(IR2153)/page11&highlight=smps+700watts

    You can find the detail how...
  20. Replies
    375
    Views
    221,574

    Hi Steven, I guess the best way to add the...

    Hi Steven, I guess the best way to add the overtemperature protection by inserting a 5V signal to pin 3 of the NE555. obviously this must be sensed from the temperature of the power fet heatsink. ...
  21. The IR2153 is not meant to be regulated. All you...

    The IR2153 is not meant to be regulated. All you can do is that you add some more voltage to the secondary and use a buck convertor to regulate your output.
    If you want a regulated supply then...
  22. I made this smps and published it here. From...

    I made this smps and published it here. From what I can see your input filter is poorly made. I cannot see the X capacitors to make up the filter I cannot see also the Y capacitors. Without these...
  23. open the file and double click on the colored...

    open the file and double click on the colored icon

    7199

    I am running windows 10 64bit and the version 7300 works fine

    regards Silvio
  24. Replies
    1
    Views
    1,008

    Try to change the control chip or...

    Try to change the control chip or mosfet/transistor controlling it. Check for broken winding in the transformer primary. Check also for faulty capacitors and high value startup resistor.

    Please...
  25. Replies
    4
    Views
    1,804

    @ mihaiu16 I have seen the datasheets of the...

    @ mihaiu16

    I have seen the datasheets of the opto drivers and transistors. The output current of the optocouplers are a little bit on the low side compared to the IR2110 one being of a maximum of...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4