1 hour ago, J.R. said:

 

They used to call Japanese bikes and cars Jap Cr@p once apon a time.

 

People will soon be screaming for Chinese rubbish once the delays from the virus really hit.

 

Mine says - Compatible with all USB-powered devices including Quick Charge 3.0/2.0 Smart phones & tablets whatever that means.

 

You should really post a link to your product.

 

Lol to the point about Chinese products. I work in IT, and our prices have already gone up haha. Every single product and replacement part has shot up in price and we are now using UK suppliers for parts as there is they both hover around the same prices now.

 

This is mine https://www.amazon.co.uk/gp/product/B07NV6XT41/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

An interesting tidbit they neglected to mention in the top section, but mentioned in the lower description is "Note: If you want to charge your notebooks quickly , such as macbook, ipad pro 2018 and so on, please make sure provide enough voltage 24V"...... so in other words the inbuilt transformer cant handle converting 12V to 20V @ 45W and its only possible with 24V supply.... Time to get a voltage booster and try see if it works

Edited 5 March, 20206 yr by sakta

23 hours ago, sakta said:

My socket takes a 12v input and provides the 45W using power delivery as its USB-C, hence it actually operates at higher than 5V (20v when connected to my MacBook) when it negotiates the connection with the other device, as part of the USB-C spec. Hence why I'm going for this option, as the versatility will let me charge my laptop and phone in the car without bulk. The wires for the cigarette socket are thick enough to be able to support the power, so I dont understand why it isn't working for the full power capacity, that's why I thought it might be best to do some new wiring to be honest. I might try connect direct to battery just to determine if this socket is just low quality or if I have some sort of issue with my socket.

Have not looked into the circuitry of investors, but a lot of this type ( also called Buck convertors) need to pass current to regulate. The one I use in my  car remote central locking needs to pass a bit of current otherwise the 12v output gets a bit too close to 13 for my liking  but regulates at 12v once a bit of current is drawn.

But 45W at what voltage?  Watts = Amps times volts ( and other combinations derived by interchanging the related formula).So 45W@ 12v will draw 3.75A, whereas 45w@5v will draw 9A.

But if you want to play with power rails on the car - take the negative lead off first, or use INSULATED TOOLS or both. If you do not know why I say this ,then GOOGLE why.

I wouldn't plug my expensive electronics into this cheap crap, inverters, put simply take a DC voltage, chop it up into a (often very) rough approximation of a sine wave then amplify it to give you the voltage you want, the IGBT's get really hot doing this work so a lot of efficiency is lost to waste heat which needs active cooling. They're a horrible and brutally inefficient kludge but the entire solar power industry lives or dies by them, at these latitudes it's mostly 'dies' frankly.

Sep- chopping input volts is the "New " way of energy conservation. But in doing so it creates stacks of RFI, unless there's a lot of design into harmonic prevention/filtering on the wave forms created on the  square wave conversions.

As for protection- Yonks ago at GPO/PO(T) we had circuits on main boards, which had a "crowbar" protection on them. Simply put, if voltage across part of the circuit exceeded limits, then SCR would fire and short out supply, killing fuse,saving expensive electronics.

2 minutes ago, VWD said:

Sep- chopping input volts is the "New " way of energy conservation. But in doing so it creates stacks of RFI, unless there's a lot of design into harmonic prevention/filtering on the wave forms created on the  square wave conversions.

As for protection- Yonks ago at GPO/PO(T) we had circuits on main boards, which had a "crowbar" protection on them. Simply put, if voltage across part of the circuit exceeded limits, then SCR would fire and short out supply, killing fuse,saving expensive electronics.

 

Conservation, yeah right, it's CHEAP, it's money that's being conserved, transformers are horribly heavy and very expensive, particularly a 20:1 step up transformer capable of handling the current but they're SO much quieter, more reliable and efficient in a static installation.

6 hours ago, VWD said:

Have not looked into the circuitry of investors, but a lot of this type ( also called Buck convertors) need to pass current to regulate. The one I use in my  car remote central locking needs to pass a bit of current otherwise the 12v output gets a bit too close to 13 for my liking  but regulates at 12v once a bit of current is drawn.

But 45W at what voltage?  Watts = Amps times volts ( and other combinations derived by interchanging the related formula).So 45W@ 12v will draw 3.75A, whereas 45w@5v will draw 9A.

But if you want to play with power rails on the car - take the negative lead off first, or use INSULATED TOOLS or both. If you do not know why I say this ,then GOOGLE why.

Generally with high power PD its always occurring at 12V and above (around 20V in my case). However the issue with chargers in recent years is that they are not analogue but rely on multiple IC's to actually regulate power, and a lot of these Chinese garbage chargers dont properly integrate the USB spec. Ive looked on aliexpress and found it and other people have also found fast charging and power delivery does not work. Oh well, at least I know where the power rails in the fabia are so I can fit something that does work

21 hours ago, sakta said:

An interesting tidbit they neglected to mention in the top section, but mentioned in the lower description is "Note: If you want to charge your notebooks quickly , such as macbook, ipad pro 2018 and so on, please make sure provide enough voltage 24V"...... so in other words the inbuilt transformer cant handle converting 12V to 20V @ 45W and its only possible with 24V supply.... Time to get a voltage booster and try see if it works

 

So its not a rubbish non functioning piece of Chinese junk after all, you didnt read the description. - I take that back, I can see that its right at the bottom and you have to scroll through loads of other rubbish & would not even know the info was there.

 

Even allowing for your not reading it was rather ambitious to expect a 12-24v step up transformer within a package of that size although given that it cost £20 and not £4 I can sympathise.

 

Another tenner will get it doing what you want of it.

 

https://www.wish.com/product/5ae6904d5708597d6066c7a4?hide_login_modal=true&from_ad=goog_shopping&_display_country_code=GB&_force_currency_code=GBP&pid=googleadwords_int&c={campaignId}&ad_cid=5ae6904d5708597d6066c7a4&ad_cc=GB&ad_curr=GBP&ad_price=10.00&campaign_id=6493229882&gclid=EAIaIQobChMIvta6keWG6AIVyeFRCh0FLQEIEAQYAiABEgLOf_D_BwE&share=web

Edited 6 March, 20206 yr by J.R.