The new Lenovo laptop I bought comes with an AC to 20V DC external power converter. Why such a high DC voltage? I would expect that most of the circuitry in there operates on 5V or even
"David Harmon"
** The PSU is also a battery charger and needs to have a voltage high enough to do that job. For a standard 14.8V Li-ion pack, the peak charging voltage is about 17V - so having 3V more available allows the regulator circuitry to work. ** The internal 14.8V battery.... Phil
The battery charger.
David Harmon a exposé le 24/11/2012 :
Hello,
Furthermore I think the screen CFL through an inverter or the screen LEDs TBC
With kind regards
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