Hello,
I’m working with the MP6541A in a BLDC application switching at 50 kHz. A few questions on the current sense outputs and gate drive timing:
Current sense filtering
I’d like to add an RC low-pass filter on the current sense output to attenuate switching noise, targeting a cutoff roughly 4x the current sense bandwidth. Is that approach appropriate for this part, and is there a recommended cutoff frequency or RC value range that avoids interfering with the internal amplifier’s response?
Output loading
What is the maximum load resistance the current sense output can drive while maintaining specified accuracy?
My current plan uses a 1 kΩ pullup to the reference voltage, plus the filter series resistance of 33Ω and ADC input impedance.
Dead time
Does this part implement internal dead-time insertion or cross-conduction protection on the gate drive outputs? If not, what minimum dead time should I enforce in firmware to prevent shoot-through, given the specified propagation delay matching and turn-off delay for the intended FETs?