User Guide
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Revision 1.1
2021-03-21
EVAL-M3-302F User Guide
iMOTION™ Modular Application Design Kit
Hardware description of EVAL-M3-302F
6.2
PFC hardware configuration
6.2.1
PFC topology selection
The EVAL-M3-302F control board applies to both PFC algorithms, boost mode and totem pole. The user needs
to ensure that the topology configuration matches the power board hardware configuration. The topology
configuration can be changed in MCEWizard as shown in Figure 17.
Figure 17
The PFC topology selection in MCEWizard for EVAL-M3-302F and EVAL-M3-CM615PN
6.2.2
PFC external current feedback configuration and calculation
Please refer to the schematic diagram of the power board for the shunt resistance value (for example, the shunt
resistors are 30 mΩ for EVAL-M3-CM615PN and 100 mΩ for EVAL-M3-TS6-606).
The current input value is a product of the shunt resistance in milliohms and gain of external current sense
amplifier as shown in Figure 18.
Figure 18
PFC current shunt feedback and sample timing
