[email protected] schrieb am 03.02.2009 19:07:15: > I have recently built a board with an LT3510 which provides +6.8V at about > 3A for a project (using the two outputs of the LT3510). Efficiency is 88%. > > All high current tracks are quite wide and with several vias in parallel > (except close to the chip since 0.65mm pin spacing really limits track width) > where they switch plane. The underside of the LT3510 is also the only > ground contact and I have small heat sinks on both sides of the board > (otherwise the LT3510 enters thermal shutdown). > > I can send you the PCB file if you want, I still measure about 1 milli ohm > between the output of the LT3510 and the final voltage (3mV loss). > > Gabriel
Hello Gabriel, because I'm new to pcb it would be great to have a look on a finished layout. I would greatly appreciate if you PM me your pcb. BTW: Is there a formula to calculate the C/W-Value of a plane at a special position (top, middle, 4-layers, 6-layers...) and size in the pcb? I seen some recommendations regarding (cooling-)planesize from various vendors but unfortunaly not for the device I use. Thanks in advance, _______________________________________________________________________________________________________________________ cand. Dipl.-Ing. (FH) Marcel Schmedes Research & Technology Cockpit Cabin Control Diehl Aerospace GmbH An der Sandelmuehle 13 D-60439 Frankfurt/Main Phone: +49 (0) 69 5805-1712 Mail: [email protected] www. http://www.diehl-aerospace.de . Der Inhalt dieser E-Mail ist für den Absender rechtlich nicht verbindlich. Informieren Sie uns bitte, wenn Sie diese E-Mail fälschlicherweise erhalten haben (Fax: +49-7551-891-4001). Bitte löschen Sie in diesem Fall die Nachricht. Jede Form der weiteren Benutzung ist untersagt. . The content of this e-mail is not legally binding upon the sender. If this e-mail was transmitted to you by error, then please inform us accordingly (Fax: +49-7551-891-4001). In such case you are requested to erase the message. Any use of such e-mail message is strictly prohibited. _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
