SLLU336A May   2021  – January 2022 MCT8316A

 

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4.3.10 Maximizing thermal efficiency and increasing thermal performance

Thermal performance can be improved by minimizing power dissipation. Power dissipation across RDS(on), Switching losses and operating supply current dissipation are the major sources of Power dissipation in MCT8316A. Power dissipation across RDS(on) is fixed as MOSFETs are integrated in MCT8316A. Please follow below recommendations to minimize switching losses and operating supply current dissipation.

Step 1: Increase Gate driver Slew rate [SLEW_RATE]

Please note that increasing Slew rate will increase EMI noise.

Step 2: Decrease PWM output frequency [PWM_FREQ_OUT]

Please note that decreasing PWM output frequency may lead to discontinuous phase current for very low inductance motors.

Step 3: Configure PWM modulation [PWM_MODUL] to Mixed modulation. In this modulation scheme, the switching losses among high and low side MOSFETs are evenly distributed.

Step 4: Enable ASR [EN_ASR] and AAR [EN_AAR] and configure PWM Mode [PWM_MODE] to Single ended mode.

Please note that enabling ASR when AAR is disabled might results in loss of Sync.