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User Manual

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Revision 1.4

2020-07-16

EVAL-M3-IM564 User Manual

iMOTION™ Modular Application Design Kit

Hardware description of EVAL-M3-IM564

4.1.4

PFC overcurrent protection circuit and PFC Gatekill configuration

OCP1 of PFC protection circuit for EVAL-M3-IM564 as shown in Figure 16, the PFC current-sensing input polarity

is non-inverting, so please reset the protection reference voltage of EVAL-M3-102T evaluation board.

Figure 16 PFC OCP1 on the EVAL-M3-IM564 evaluation board

For example:

If R8=470 ohm and R9=1.65 kohm, then VPFCTRIPREF=2568 mV, the PFC cycle by cycle current limit is as follows,

= −∗

Where,

=2568 −166

12∗10 =20

If a larger PFC current-protection setting value is needed, please modify the R8 and R9 of EVAL-M3-102T board

and refer to the control board’s user manual for more details.

OCP2 of PFC protection circuit for EVAL-M3-IM564 as shown in Figure 17, please note that for control board

EVAL-M3-102T, the external PFC gatekill signal PFCGK is not used. This MADK board connects the PFCGK to the

motor GK temporarily for PFC overcurrent protection when using control board EVAL-M3-102T.

Note: The PFC overcurrent protection circuit only generates the signal of PFCGK; there is no further action for EVAL-

M3-IM564. The power board will not turn off the PFC gate driver IC if the control board is disable when the

PFCGK is active.

Figure 17 The PFCTRIPREF circuit on the EVAL-M3-102T evaluation board

3.3V

PFCTRIPREF

IPFC0

iMOTION

Controller

IPFC

PFCTRIPREF

R8 change to 470 ohm

R9 change to 1.65 kohm

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