I have an electrical question about a custom adaptor I want to build.
The monitor im using: philips 258B6QUEB/00 https://www.philips.co.uk/c-p/258B6QUEB_00/brilliance-lcd-monitor-with-usb-c-dock
It uses a power brick 230 V AC to 19.5 V DC at 7.7 A.
Because I live on a boat, I want to make a power adapter that works on my boats 12 V system.
What I was thinking to buy this 12 to 19.5 V converter: https://a.aliexpress.com/_Euyf5jF
And this power cable: https://a.aliexpress.com/_EQ7mWI5
And with those in theory I can make a 12 to 19.5 V adapter right?
But the cable has 3 wires in it, one positive, one negative, and a third unknown one. Which I really don’t know what it does.
And the monitor has a USB-C connection which I know can make it more complicated.
Will this work? Or am I better of to find a car changer and modify that one?
Fist of all thanks for the detailed response!
I must amit that in my OP I had no more (online)info then you guys, (only some unhelpful unsharp photos from ad) because I bought it through a online marketplace, and its only just now arrived.
And I did found some specs on the power supply and monitor itself(without dismantling it).
The monitor tells me on the back label, that it takes the 19.5vdc @7.7a as i expected. But has also the following warning on it: "Never remove covers unless qualified to do so, Use only AC/DC Adapter listed in the user instruction." Which is more specific than on the last part than a "normal" warning dont open label i think.
The power supply gives me also some new clues;
Model NO: TPV150-RFBN2
AC INPUT: 100-240V~, 2A 50-60Hz
DC OUTPUT:19,5V (DC icon) 7,7A 150.0W
(Mini plug scheme/diagram);
Black(-): outershell plug
White(+): inershell plug
ID PIN(N.C): innerpin plug
That makes me think that this probably is just like the DELL notebook charger case, as you referred to. Where it probably is bit like the USBC charger chip thing, where the charger works by ID handshake to verify the needed voltage and max amps.(correct me if I'm wrong)
Because of the power consumption specs (23 W) on the philips website i assumed my OP would work, but it gets clear that its not so simple as I hoped.
I want to use the monitor together a WiDi hdmi stick to connect to my Raymarine plotter, and mirror the image from the plotter and mount it in the navigatie corner inside the boat. And add it to the navigation equipment electrical group so its starts up simultaneously as the raymarine.
So as you suggested, its the easiest way to just use adaptor as intended and just kabel manage it away(room enough behind panel) and let my Victron multiplus II 3KW inverter take the load as its running anyways when I'm onboard.
Any suggestions for an 3-way AC switch with on/off/remote(signal from DC raymarine group)? To help power it up, and it's still usable as laptop monitor when DC group is off. Or have the propper name for a switch like that?(so i can find it on google)
Sorry for the bad English and probably some wrong designations, its not my native tongue.
Once again really appreciate your detailed response, and thank in advance for all the effort in the replys!