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I am in need of a 80 buck converter that is adjustable rated 4 amps or better

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    I am in need of a 80 buck converter that is adjustable rated 4 amps or better

    Can anyone recommend a switching regulator or a buck converter that has these specifications

    Input voltage 80 adjustable at least 4 amps or better

    Any information would greatly appreciated

    Thanks
    Last edited by sam_sam_sam; 02-26-2021, 05:52 PM.
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    #2
    Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

    What is the highest input Voltage do you need?
    Is the 80VDC the minimum input Voltage?
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment


      #3
      Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

      From what I have seen when turning the power supply on that this voltage stabilizes at 70 to 75 volts and stay at this level until it is loaded and at 3.5 amps it is about 50 volts or so this is also stable

      I would like to have some head room above the maximum voltage that I have seen so far
      9 PC LCD Monitor
      6 LCD Flat Screen TV
      30 Desk Top Switching Power Supply
      10 Battery Charger Switching Power Supply for Power Tool
      6 18v Lithium Battery Power Boards for Tool Battery Packs
      1 XBox 360 Switching Power Supply and M Board
      25 Servo Drives 220/460 3 Phase
      6 De-soldering Station Switching Power Supply 1 Power Supply
      1 Dell Mother Board
      15 Computer Power Supply
      1 HP Printer Supply & Control Board * lighting finished it *


      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
      2 Hem Saw Computer Stack Board

      All of these had CAPs POOF
      All of the mosfet that are taken out by bad caps

      Comment


        #4
        Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

        Test
        9 PC LCD Monitor
        6 LCD Flat Screen TV
        30 Desk Top Switching Power Supply
        10 Battery Charger Switching Power Supply for Power Tool
        6 18v Lithium Battery Power Boards for Tool Battery Packs
        1 XBox 360 Switching Power Supply and M Board
        25 Servo Drives 220/460 3 Phase
        6 De-soldering Station Switching Power Supply 1 Power Supply
        1 Dell Mother Board
        15 Computer Power Supply
        1 HP Printer Supply & Control Board * lighting finished it *


        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
        2 Hem Saw Computer Stack Board

        All of these had CAPs POOF
        All of the mosfet that are taken out by bad caps

        Comment


          #5
          Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

          What are the specs you are looking for? >80VDC 4A in, 50VDC 4A out?

          Comment


            #6
            Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

            Originally posted by redwire View Post
            What are the specs you are looking for? >80VDC 4A in, 50VDC 4A out?
            I could work with these specifications that you have in your reply

            But what I am really interested in is an adjustable output voltage at minimum of 4 amps
            Last edited by sam_sam_sam; 02-28-2021, 06:20 AM.
            9 PC LCD Monitor
            6 LCD Flat Screen TV
            30 Desk Top Switching Power Supply
            10 Battery Charger Switching Power Supply for Power Tool
            6 18v Lithium Battery Power Boards for Tool Battery Packs
            1 XBox 360 Switching Power Supply and M Board
            25 Servo Drives 220/460 3 Phase
            6 De-soldering Station Switching Power Supply 1 Power Supply
            1 Dell Mother Board
            15 Computer Power Supply
            1 HP Printer Supply & Control Board * lighting finished it *


            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
            2 Hem Saw Computer Stack Board

            All of these had CAPs POOF
            All of the mosfet that are taken out by bad caps

            Comment


              #7
              Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

              Would this work

              DC-DC Buck Converter Step-Down Power Supply Module in 20-70V Out 2.5-58V 30A

              https://www.ebay.com/itm/DC-DC-Buck-...sAAOSwCi9gBloK
              Last edited by sam_sam_sam; 02-28-2021, 10:08 AM.
              9 PC LCD Monitor
              6 LCD Flat Screen TV
              30 Desk Top Switching Power Supply
              10 Battery Charger Switching Power Supply for Power Tool
              6 18v Lithium Battery Power Boards for Tool Battery Packs
              1 XBox 360 Switching Power Supply and M Board
              25 Servo Drives 220/460 3 Phase
              6 De-soldering Station Switching Power Supply 1 Power Supply
              1 Dell Mother Board
              15 Computer Power Supply
              1 HP Printer Supply & Control Board * lighting finished it *


              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
              2 Hem Saw Computer Stack Board

              All of these had CAPs POOF
              All of the mosfet that are taken out by bad caps

              Comment


                #8
                Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                Is this for powering that big solenoid? Does it have a reverse-diode across it?
                The raw DC is from a control transformer feeding a bridge-rectifier with no filter capacitor?
                Just trying to get clear on what the load and input power is.

                Because any buck-converter will not like input ripple.

                Comment


                  #9
                  Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                  Originally posted by redwire View Post
                  Is this for powering that big solenoid? Does it have a reverse-diode across it?
                  The raw DC is from a control transformer feeding a bridge-rectifier with no filter capacitor?
                  Just trying to get clear on what the load and input power is.

                  Because any buck-converter will not like input ripple.
                  I basically want to use this to test LED strips and modules and any device that has a voltage above 40 volts

                  How much filtering capacitors would I need and what type an UF value

                  I am going to power this device from the ATX switching power supply —> auxiliary power supply board
                  9 PC LCD Monitor
                  6 LCD Flat Screen TV
                  30 Desk Top Switching Power Supply
                  10 Battery Charger Switching Power Supply for Power Tool
                  6 18v Lithium Battery Power Boards for Tool Battery Packs
                  1 XBox 360 Switching Power Supply and M Board
                  25 Servo Drives 220/460 3 Phase
                  6 De-soldering Station Switching Power Supply 1 Power Supply
                  1 Dell Mother Board
                  15 Computer Power Supply
                  1 HP Printer Supply & Control Board * lighting finished it *


                  These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                  1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                  2 Hem Saw Computer Stack Board

                  All of these had CAPs POOF
                  All of the mosfet that are taken out by bad caps

                  Comment


                    #10
                    Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                    one of the psu makers, i think kunkin makes one that is 5a 120v

                    Comment


                      #11
                      Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                      https://www.ebay.com/itm/900W-15A-DC.../133612454146?

                      Comment


                        #12
                        Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                        Originally posted by stj View Post
                        one of the psu makers, i think kunkin makes one that is 5a 120v
                        Do you have a website link to where you can buy one

                        I found this and this would work also

                        https://www.ebay.com/itm/FNIRSI-DC60...kAAOSwF5dfhtrW

                        The only thing I have to figure out is how to make sure that the incoming voltage does not exceed 70 volts because I was looking earlier for a Zener diode to limit the voltage to 60 to 80 volts and could not find anything I could use

                        Thanks
                        Last edited by sam_sam_sam; 02-28-2021, 03:39 PM.
                        9 PC LCD Monitor
                        6 LCD Flat Screen TV
                        30 Desk Top Switching Power Supply
                        10 Battery Charger Switching Power Supply for Power Tool
                        6 18v Lithium Battery Power Boards for Tool Battery Packs
                        1 XBox 360 Switching Power Supply and M Board
                        25 Servo Drives 220/460 3 Phase
                        6 De-soldering Station Switching Power Supply 1 Power Supply
                        1 Dell Mother Board
                        15 Computer Power Supply
                        1 HP Printer Supply & Control Board * lighting finished it *


                        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                        2 Hem Saw Computer Stack Board

                        All of these had CAPs POOF
                        All of the mosfet that are taken out by bad caps

                        Comment


                          #13
                          Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                          Thank you for your website link I am sure that this will work for boost the voltage up but I am looking for buck converter to go from 80 volt to 12 for something lower if possible but I wanting it to be adjustable

                          I just have to wait until I have some more money to buy one

                          Hopefully soon
                          Last edited by sam_sam_sam; 02-28-2021, 03:40 PM.
                          9 PC LCD Monitor
                          6 LCD Flat Screen TV
                          30 Desk Top Switching Power Supply
                          10 Battery Charger Switching Power Supply for Power Tool
                          6 18v Lithium Battery Power Boards for Tool Battery Packs
                          1 XBox 360 Switching Power Supply and M Board
                          25 Servo Drives 220/460 3 Phase
                          6 De-soldering Station Switching Power Supply 1 Power Supply
                          1 Dell Mother Board
                          15 Computer Power Supply
                          1 HP Printer Supply & Control Board * lighting finished it *


                          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                          2 Hem Saw Computer Stack Board

                          All of these had CAPs POOF
                          All of the mosfet that are taken out by bad caps

                          Comment


                            #14
                            Re: I am in need of a 80 buck converter that is adjustable rated 4 amps or better

                            Not adjustable but you may be able to modify the feedback circuit.

                            What is the adjustable range?
                            https://www.amazon.com/Pro-Chaser-re.../ref=pd_sbs_4?

                            https://www.amazon.com/High-Voltage-.../ref=pd_sbs_1?
                            Never stop learning
                            Basic LCD TV and Monitor troubleshooting guides.
                            http://www.badcaps.net/forum/showthr...956#post305956

                            Voltage Regulator (LDO) testing:
                            http://www.badcaps.net/forum/showthr...999#post300999

                            Inverter testing using old CFL:
                            http://www.badcaps.net/forum/showthr...er+testing+cfl

                            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                            http://s807.photobucket.com/user/budm/library/

                            TV Factory reset codes listing:
                            http://www.badcaps.net/forum/showthread.php?t=24809

                            Comment

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