X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <51EC2022.5010903@estechnical.co.uk> Date: Sun, 21 Jul 2013 18:53:38 +0100 From: Ed Simmons User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130623 Thunderbird/17.0.7 MIME-Version: 1.0 To: geda-user AT delorie DOT com CC: Rob Butts Subject: Re: [geda-user] H-bridge footprint help References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated-As: ed AT estechnical DOT co DOT uk Reply-To: geda-user AT delorie DOT com On 21/07/13 18:22, Rob Butts wrote: > The spec says peak power is 36.5 watts and nominal is 24 watts but if > I'm pushing 8 amps at nominal power 12 volts aren't those h-bridges > seeing 96 watts? The H bridge parts will dissipate a little as defined by the on resistance of the MOSFETs and the load current, but this will be minimal as the on resistance of your mosfets should be very low... :) Ed