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Motor System IC - TLE9560/61/62 What is the benefit of configuring separately the cross-current and blank times for the active and for the freewheeling MOSFETs?

Motor System IC - TLE9560/61/62 What is the benefit of configuring separately the cross-current and blank times for the active and for the freewheeling MOSFETs?

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Motor System IC - TLE9560/61/62 What is the benefit of configuring separately the cross-current and blank times for the active and for the freewheeling MOSFETs?

During PWM operation of the external half-bridges, the turn-on and the turn-off of the active MOSFETs cause a significant variation of the drain-source voltaSolvege (VDS) from about ~VS to ~ GND and from ~GND to ~VS. Therefore in some applications, the turn-on and turn-off time of the active MOSFET must be long enough for a good electromagnetic emission (EME).

In contrast the turn-on and turn-off of the freewheeling (FW) MOSFETs cause only a small variation of VDS. This variation is equal to the forward voltage of the body diode of the MOSFETs. Therefore the turn-on and turn-off phases of the FW MOSFET can be shorter, without significant penalties in terms of EME.

The different turn-on and turn-off times of the FW and of the active MOSFETs require a separate setting for the cross-current protection time and blank times for the FW and for the active MOSFETs.

Refer to these e-learnings for more information: https://www.infineon.com/cms/media/eLearning/Automotive/adaptive-MOSFET-control/

https://www.infineon.com/cms/media/eLearning/Automotive/advanced-motor-control-intro/

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