C2 USB Power ECR

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Revision as of 00:27, 27 November 2007 by Wad (talk | contribs) (New page: The power limitation on USB power is currently 4.25W on production (C2) laptops. ===Increasing USB power to 5W=== To increase the maximum power draw to 5W, replace R281 with a 180K, 1%, S...)
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The power limitation on USB power is currently 4.25W on production (C2) laptops.

Increasing USB power to 5W

To increase the maximum power draw to 5W, replace R281 with a 180K, 1%, SMD0402 resistor.


Increasing USB power to 7.5W

To increase the maximum power draw to 7.5W, replace R281 with a 120K, 1%, SMD0402 resistor. Please note that this decreases the maximum ambient temp. rating, and increases the total power dissipation of the laptop. A laptop supplying 7.5W to the USB should always have a battery present. If this power is going to be drawn from a single USB socket, it should be from one of the two sockets nearest the power button.

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