DC boost converter max power ?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • bianchi77
    Badcaps Legend
    • Jun 2016
    • 1121
    • Australia

    #61
    Re: DC boost converter max power ?

    any other idea for increasing current beside playing with inductor ? perhaps a transistor follower ?

    Comment

    • joshnz
      Badcaps Veteran
      • Feb 2011
      • 969
      • New Zealand

      #62
      Re: DC boost converter max power ?

      At that frequency you will need 7392uH
      My pc
      CPU : AMD PHENOM II x4 @ 3.5Ghz
      MB : ASUS M4A89TD PRO USB3
      RAM : Kingston ValueRAM 16gb DDR3
      PSU : Cooler Master 850W Silent Pro
      GPU : ATI Radeon HD 6850

      Comment

      • bianchi77
        Badcaps Legend
        • Jun 2016
        • 1121
        • Australia

        #63
        Re: DC boost converter max power ?

        Originally posted by joshnz
        At that frequency you will need 7392uH
        which equation or calculator do you use ?

        Comment

        • bianchi77
          Badcaps Legend
          • Jun 2016
          • 1121
          • Australia

          #64
          Re: DC boost converter max power ?

          I put 700uH and the voltage drop to 24V

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #65
            Re: DC boost converter max power ?

            Btw, are you trying to use the boost converter for your nixie project?
            http://www.dos4ever.com/flyback/flyback.html#ind1
            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

            • joshnz
              Badcaps Veteran
              • Feb 2011
              • 969
              • New Zealand

              #66
              Re: DC boost converter max power ?

              i used https://learn.adafruit.com/diy-boost...the-calculator
              My pc
              CPU : AMD PHENOM II x4 @ 3.5Ghz
              MB : ASUS M4A89TD PRO USB3
              RAM : Kingston ValueRAM 16gb DDR3
              PSU : Cooler Master 850W Silent Pro
              GPU : ATI Radeon HD 6850

              Comment

              • bianchi77
                Badcaps Legend
                • Jun 2016
                • 1121
                • Australia

                #67
                Re: DC boost converter max power ?

                Probably I use a better inductor or change to flyback transformer to obtain a better power...

                Comment

                • bianchi77
                  Badcaps Legend
                  • Jun 2016
                  • 1121
                  • Australia

                  #68
                  Re: DC boost converter max power ?

                  Originally posted by budm
                  Btw, are you trying to use the boost converter for your nixie project?
                  http://www.dos4ever.com/flyback/flyback.html#ind1
                  No I don't have a nixie tube, but I change it to bulb, that's why I need more power, do you have an idea to increase the power beside changing the inductor to transformer ?

                  Comment

                  • joshnz
                    Badcaps Veteran
                    • Feb 2011
                    • 969
                    • New Zealand

                    #69
                    Re: DC boost converter max power ?

                    easiest option is increase oscillator frequency.
                    My pc
                    CPU : AMD PHENOM II x4 @ 3.5Ghz
                    MB : ASUS M4A89TD PRO USB3
                    RAM : Kingston ValueRAM 16gb DDR3
                    PSU : Cooler Master 850W Silent Pro
                    GPU : ATI Radeon HD 6850

                    Comment

                    • bianchi77
                      Badcaps Legend
                      • Jun 2016
                      • 1121
                      • Australia

                      #70
                      Re: DC boost converter max power ?

                      Originally posted by joshnz
                      easiest option is increase oscillator frequency.
                      then change the inductor ?
                      I've tried with higher frequency but voltage drop...
                      but I'll try again
                      for example from 15KHz and 33uH...

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #71
                        Re: DC boost converter max power ?

                        Well, you now have two calculators you can use for plugging the known parameters.
                        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

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #72
                          Re: DC boost converter max power ?

                          I think you should use single inductor instead of using two discrete inductors connected in series, I do not know what kind of effect when you use two discrete inductors, never seen any one using it in that manner.
                          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

                          • joshnz
                            Badcaps Veteran
                            • Feb 2011
                            • 969
                            • New Zealand

                            #73
                            Re: DC boost converter max power ?

                            9khz with 750uh or greater
                            or
                            10khz with 680uh or greater
                            or
                            15khz with 450uh or greater

                            as you can see inductor size and frequency go together also input voltage and output current

                            Also you will need a psu that can supply at least 20 watts to be sure the boost converter has enough power.
                            Last edited by joshnz; 12-04-2016, 02:59 AM.
                            My pc
                            CPU : AMD PHENOM II x4 @ 3.5Ghz
                            MB : ASUS M4A89TD PRO USB3
                            RAM : Kingston ValueRAM 16gb DDR3
                            PSU : Cooler Master 850W Silent Pro
                            GPU : ATI Radeon HD 6850

                            Comment

                            • bianchi77
                              Badcaps Legend
                              • Jun 2016
                              • 1121
                              • Australia

                              #74
                              Re: DC boost converter max power ?

                              following this equation
                              what's x value ? is it 220/12 ?
                              Attached Files

                              Comment

                              • bianchi77
                                Badcaps Legend
                                • Jun 2016
                                • 1121
                                • Australia

                                #75
                                Re: DC boost converter max power ?

                                Originally posted by joshnz
                                9khz with 750uh or greater
                                or
                                10khz with 680uh or greater
                                or
                                15khz with 450uh or greater

                                as you can see inductor size and frequency go together also input voltage and output current
                                so for 47uH probably 150KHz ?

                                Comment

                                • joshnz
                                  Badcaps Veteran
                                  • Feb 2011
                                  • 969
                                  • New Zealand

                                  #76
                                  Re: DC boost converter max power ?

                                  Originally posted by bianchi77
                                  for example from 15KHz and 33uH...
                                  where did you get that from?
                                  My pc
                                  CPU : AMD PHENOM II x4 @ 3.5Ghz
                                  MB : ASUS M4A89TD PRO USB3
                                  RAM : Kingston ValueRAM 16gb DDR3
                                  PSU : Cooler Master 850W Silent Pro
                                  GPU : ATI Radeon HD 6850

                                  Comment

                                  • bianchi77
                                    Badcaps Legend
                                    • Jun 2016
                                    • 1121
                                    • Australia

                                    #77
                                    Re: DC boost converter max power ?

                                    I have one big 120uH 3A inductor...could be 45KHz, will match what I need ?

                                    Comment

                                    • bianchi77
                                      Badcaps Legend
                                      • Jun 2016
                                      • 1121
                                      • Australia

                                      #78
                                      Re: DC boost converter max power ?

                                      Originally posted by joshnz
                                      where did you get that from?
                                      just a guess

                                      Comment

                                      • joshnz
                                        Badcaps Veteran
                                        • Feb 2011
                                        • 969
                                        • New Zealand

                                        #79
                                        Re: DC boost converter max power ?

                                        Originally posted by bianchi77
                                        so for 47uH probably 150KHz ?
                                        yes
                                        My pc
                                        CPU : AMD PHENOM II x4 @ 3.5Ghz
                                        MB : ASUS M4A89TD PRO USB3
                                        RAM : Kingston ValueRAM 16gb DDR3
                                        PSU : Cooler Master 850W Silent Pro
                                        GPU : ATI Radeon HD 6850

                                        Comment

                                        • joshnz
                                          Badcaps Veteran
                                          • Feb 2011
                                          • 969
                                          • New Zealand

                                          #80
                                          Re: DC boost converter max power ?

                                          in your drawing it shows output diode as 1N3822 is that correct?
                                          Your output diode will need to be fast switching type.
                                          Last edited by joshnz; 12-04-2016, 03:05 AM.
                                          My pc
                                          CPU : AMD PHENOM II x4 @ 3.5Ghz
                                          MB : ASUS M4A89TD PRO USB3
                                          RAM : Kingston ValueRAM 16gb DDR3
                                          PSU : Cooler Master 850W Silent Pro
                                          GPU : ATI Radeon HD 6850

                                          Comment

                                          Related Topics

                                          Collapse

                                          • Tynan Dill
                                            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                            by Tynan Dill
                                            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                            Upon bringing it home and plugging it up, it showed a standby light.

                                            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                            The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                            Assuming...
                                            11-22-2024, 01:46 PM
                                          • GLISIT
                                            Asus Probook P5440UF-XB74 power issue
                                            by GLISIT
                                            Hi all,

                                            TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


                                            I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

                                            A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
                                            01-16-2025, 02:29 PM
                                          • PantherDave
                                            Microsoft Surface Pro (5th gen) model 1796 - no power
                                            by PantherDave
                                            Hi all!

                                            I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

                                            I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
                                            https://www.badcaps.net/forum/troubl...-hardware-devi...
                                            05-29-2024, 02:01 PM
                                          • sam_sam_sam
                                            Mitsubishi CNC switching power supply board dead / relay board bad diode failure
                                            by sam_sam_sam
                                            I was working on this CNC machine today found no keyboard functioning no control relay powering on
                                            The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board

                                            Found shorted diodes on main controller relays there are 3 of them that...
                                            01-07-2023, 05:43 PM
                                          • meraklinetx
                                            Asus Z97-a power cycle, no boot no cpu voltage
                                            by meraklinetx
                                            Hello, I have an asus Z97-A motherboard and it doesn't start which was working properly before, the problem isn't related by ram, ram slots or psu (I changed all and nothing work), the exact problem is when you switch it on , it starts and after 1 seconds (no boot or display picture) it's off and then on cycle continuously until you power it off from psu also it's responding to the power switch for turning it off if you keep pressing it 3 or 4 seconds (power button pin has 3.3v) , also when you start it with eatx 12v socket connected this is happening (power cycle also all voltages are resetting...
                                            05-10-2023, 06:08 AM
                                          • Loading...
                                          • No more items.
                                          Working...