Huge is certainly a relative term. That sink isn't going to dissipate 78 watts unless you dip the fins in ice water.
But is certainly will dissipate something. And 0.016 ohms is a pretty low on-resistance. Let's say the sink can handle 10 watts. In an H-bridge, one device on each side is conducting at any given time. That means each one can dissipate 5 watts. With 0.016 ohms on-resistance, it should be good for 17A. (That doesn't count switching losses, and assumes that they are using synchronous rectification and not just plain freewheeling diodes.) On Fri, Jul 26, 2013, at 03:27 PM, andy pugh wrote: > On 26 July 2013 19:39, Ralph Stirling <[email protected]> wrote: > > That little board doesn't have any heat sinking > > I think it has a huge one on the back? > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich [email protected] ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
