TMC6200 DATASHEET (Rev. 1.01 / 2018-NOV-15)
15
ENSURE RELIABLE OPERATION
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Use SMD MOSFETs and short interconnections
Provide sufficient power filtering capacity close to the bridge and close to VS pin
Tune MOSFET switching slopes (measure switch-on event at MOSFET gate) to be slower than the
MOSFET bulk diode reverse recovery time. This will reduce cross conduction.
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Add optional gate resistors close to MOSFET gate and output capacitors to ensure clean switching
and reliable operation by minimizing ringing. Figure 3.5 shows the options plus some variations.
Some MOSFETs eliminate reverse recovery charge by integrating a fast diode from source to drain.
Figure 3.6 Ringing of output (green) and Gate voltages (yellow, blue) with DRVSTRENGTH=0
Figure 3.7 Ringing of output (green) and Gate voltages (yellow, blue) with DRVSTRENGTH=2
Figure 3.8 Ringing of output (green) and Gate voltages (yellow, blue) with DRVSTRENGTH=3
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