DC boost converter max power ? - Badcaps

New Members (required) Introduce yourself here. Read the Forum rules here.

X

bianchi77

Badcaps Legend

Join Date: Jun 2016

Posts: 1121

Country: Australia
#61

12-04-2016, 02:25 AM

Re: DC boost converter max power ?

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

Badcaps Veteran

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#62

12-04-2016, 02:30 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#63

12-04-2016, 02:31 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#64

12-04-2016, 02:31 AM

Re: DC boost converter max power ?

I put 700uH and the voltage drop to 24V
Comment
budm

Badcaps Legend

Join Date: Feb 2010

Posts: 40746

Country: USA
#65

12-04-2016, 02:35 AM

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

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#66

12-04-2016, 02:36 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#67

12-04-2016, 02:40 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#68

12-04-2016, 02:42 AM

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

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#69

12-04-2016, 02:49 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#70

12-04-2016, 02:51 AM

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

Join Date: Feb 2010

Posts: 40746

Country: USA
#71

12-04-2016, 02:52 AM

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

Join Date: Feb 2010

Posts: 40746

Country: USA
#72

12-04-2016, 02:55 AM

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

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#73

12-04-2016, 02:56 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#74

12-04-2016, 02:57 AM

Re: DC boost converter max power ?

following this equation
what's x value ? is it 220/12 ?
Attached Files
Comment
bianchi77

Badcaps Legend

Join Date: Jun 2016

Posts: 1121

Country: Australia
#75

12-04-2016, 02:59 AM

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

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#76

12-04-2016, 03:01 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#77

12-04-2016, 03:01 AM

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

Join Date: Jun 2016

Posts: 1121

Country: Australia
#78

12-04-2016, 03:01 AM

Re: DC boost converter max power ?

Originally posted by joshnz

where did you get that from?

just a guess
Comment
joshnz

Badcaps Veteran

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#79

12-04-2016, 03:02 AM

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

Join Date: Feb 2011

Posts: 969

Country: New Zealand
#80

12-04-2016, 03:03 AM

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

Previous 1 2 3 4 5 6 7 template Next

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...

7 Photos
- Channel: Troubleshooting TVs and Video Sources
11-22-2024, 01:46 PM
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...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
01-16-2025, 02:29 PM
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...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-29-2024, 02:01 PM
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...
- Channel: General Electronics Technical Discussion
01-07-2023, 05:43 PM
what is function of diode over power transistor?

by harp

I see on some schematic a diode over power transistor, and dont know is in it some trick to carry current, or what is the point?...
- Channel: General Electronics Technical Discussion
Today, 06:18 PM
Loading...
No more items.

Working...