Hello,
I am looking for a closed loop 3phase BLDC motor pre-driver chip for a EV application that drives 3 half bridges of "IRFSL4115PbF" N-Channel Hexfets.
I need to drive a 3 phase Brushless DC motor (I have a 4 pole motor from a Hard drive to start, but then eventually a larger rated motor 100V-150V,50-100A with unknown motor characteristics/specs).
I am looking into using a Gate Driver IC from Fairchild "FAN7382N". Do you have a chip that is an all-in-one bootstrap IC that is faster than 100 to 150ns == t_on?
Do you have an IC that can operate at f_sw == 20kHz?
I would like to be able to use Open loop functionality (I feed it a 5V or 12V pwm, or analog voltage and it goes - will the CLKIN pin work for that?).
Is the DRV8308 the chip for the job?
Is the DRV8308 a better/newer chip than the DRV8307?
Is DRV5013 the recommended Hall sensor for each phase?
I have previous experience using dsPIC33E microprocessors. Are there TI chips that are able to be programmed with a PICKIT3 that would be a better microprocessor for energy efficiency & instruction speed(dsPIC33E max speed is a 3.3V device running at 70MIPS and draws 50-200mA depending on how power-hungry it is on that day)?
What would be the series resistance between a 3.3V dsPIC33E and the I/O pins - BRAKE,RESET,DIR (330ohm, 500ohm,1kohm)?
I am trying to use “IRFSL4115PbF” HEXFETs (1 to 2 for each switch in 3phase h-bridge, so 6 or 12 total mosfets)
Can the Power N-Channel MOSFETS be located attached to a heat sink (not on the same pcb as the DRV8308, but placed a distance of 0.5m to 1m away on an isolated higher voltage power rail)? I am just attempting to isolate the motor noise from the controller board circuits (The easiest way I know is to have isolated power rails, but I am open to suggestions).
Would I be able to use a hall current sensor with the "FAULTn" pin to limit/shutdown if there is too much current (Current sensor is here:http://www.digikey.com/product-detail/en/HASS%20200-S/398-1064-ND/1680530)?
Do I have to use the FG trace,FGINP,FGINN/TACH - for the motor? I eventually wish to use will not be near the control pre-driver chip. I think that encoders are the way to go.
Are there Texas Instruments ICs that handle Regenerative Braking?
(Page59) Do I place a solder pad underneath the chip with via holes to act as a heat sink, or do I just have exposed copper mask?
On Digikey, what is/are the difference(s) between the two models: DRV8308RHAT & DRV8308RHAR?
I think that they are both Tape dispensed, so the second one is not reel???
Thank you,
Keith