On 11/25/2014 11:22 AM, Anton Aylward wrote:
The question was "why 19VDC?" That meant why, since the electronics run on 5VDC or less and _maybe_ the disk motor needs 12VDC and _maybe_ the DVD burner needs 12VDC is the thing being supplied with 7VDC over its obvious need?
One explanation was battery charging.
Take the battery out and what need is there for more than 12VDC?
Take the DVD burner out and run on a 5VDC SSD and what need is there for the 12VDC?
Just for you Anton, I flipped over my 19v laptop (dell 9400) yanked the battery out, in preparation to measure it, but found it impossible to get probes into the slots where the contacts are. But on the battery it said 11.1Vdc output. This is the second battery I've had for this laptop, and different models were available from Dell, which had different voltages, one was 13, as I recall. I suspect the charging voltage on this 11.1v is somewhere around 14v. So I'm guessing that they need 19 for charging and powering at the same time. When running on battery they may need step-down dc-to-dc regulators inside for all the peripherals, and god only knows what for the screen. -- After all is said and done, more is said than done. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org