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Practical layout for current sensing circuit of IRMCF300 series IC

Posted: 01 Jul 2010     Print Version  Bookmark and Share

Keywords:IRMCF300 series IC  circuit practical layout  current sensing circuit 

This application note provides practical tips on PCB layout and how to set configuration registers when using the IRMCF300 series of sensorless motor control ICs. The control IC reconstructs the motor winding currents by sampling the current flowing in the inverter DC link. The IRMCF300 series ICs include the amplifiers, A/D and timing circuits required for motor current reconstruction. Careful design of the current feedback circuit layout will minimise noise and provide a high quality current measurement. Configuration registers in the IRMCF300 series ICs allow fine tuning of the sampling instants to maximise the fidelity of the measurement. The application note describes operating principles, practical implementation and test results.

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