Thermal considerations

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The DM9000B Ethernet controller of the EM203 can become very hot during normal module operation. To aid the module in dissipating excess heat, a special heat-conductive sticker is applied to the top of the DM9000B. Protective paper of the sticker MUST BE REMOVED prior to installing the module on the host PCB.

 

EM203_remove_paper

 

To further lower the operating temperature of the EM203 we advise you to arrange a copper area on the host PCB and in contact with the heat-conductive sticker. Best results are achieved when the copper area is larger, and also when two copper areas are provided on both sides of the host PCB and interconnected by a number of large vias.

 

EM203_thermal