Part Number: DRV8302
Can I use DRV8302 with two phase motor - or there exists some other more appropriate part for usewith two phase brush motor?
I started drawing schematic - and then I wanted to make sure if there will be no problem if I do not use third half bridge.
In that case is it ok to leave lines hanging in air or should I tie them to GND?
Also if I use M_PWM to 3.3V (without need of INL lines), should I tie thouse to GND or is it ok to leave them float?
Yes, you can use the DRV8302 with a two phase motor. There could be a better choice depending on the motor specifications. What are the voltage and current requirements?
If you are using M_PWM set high, it is recommended to connect the unused INL_x and INH_x to a logic zero. SL_x should be connected to GND. GL_x, GH_x. SH_x can be connected through a 1kOhm resistor to GND, which will indicate the low side of the unused phase is on.
Rick DuncanMotor Applications Team
In reply to Rick Duncan:
I need to drive 2 brush motors each 5A-10A(start coditions), by 30V.
I know drv8302 is not optimal since one phase will be left out, but I have reference design, already ytested and people use it:
Another question I have is why there is only two shunts on drv8302, but there are three phases - so 3 shunts will be more logical is this compromise of a sort?
If you think there is more suitable gate driver with current sense with amplifier please let me know.
In reply to Zhivko:
On page 25 of datasheet, I see no vias on phase 3 "shunt" toward GND. Can you check if there should be no VIAS there as it is shown on page 25 datasheet? I marked them red on picture copied from datasheet.
Yes, there should be vias at the location highlighted. Thank you for pointing this out.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.