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#1 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
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Posts: 2,601
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![]() 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
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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 ![]() All of the mosfet that are taken out by bad caps ![]() Last edited by sam_sam_sam; 02-26-2021 at 05:52 PM.. |
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#2 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Line Voltage: 120V 60Hz
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![]() What is the highest input Voltage do you need?
Is the 80VDC the minimum input Voltage?
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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 |
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#3 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
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Line Voltage: 120 Volts 60 HZ
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![]() 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 |
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#4 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
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#5 |
Badcaps Veteran
Join Date: Dec 2010
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![]() What are the specs you are looking for? >80VDC 4A in, 50VDC 4A out?
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#6 | |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
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Line Voltage: 120 Volts 60 HZ
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![]() Quote:
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 at 06:20 AM.. |
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#7 |
Badcaps Veteran
Join Date: Jul 2011
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![]() 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 at 10:08 AM.. |
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#8 |
Badcaps Veteran
Join Date: Dec 2010
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![]() 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. |
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#9 | |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
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![]() Quote:
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 |
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#10 |
Great Sage 齊天大聖
Join Date: Dec 2009
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![]() one of the psu makers, i think kunkin makes one that is 5a 120v
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#11 |
Badcaps Veteran
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#12 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
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Line Voltage: 120 Volts 60 HZ
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![]() 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 at 03:39 PM.. |
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#13 | |
Badcaps Veteran
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
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Line Voltage: 120 Volts 60 HZ
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![]() Quote:
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 at 03:40 PM.. |
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#14 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Line Voltage: 120V 60Hz
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![]() 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? |
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