Is the logic side of the 36v20 CS turned on by using the 36v motor battery? Or does the logic side need to be powered by a separate 5v power supply?
Thanks,
Zach Rowland
Hello, Zach.
You do not need a separate 5V logic source to run the driver; if you want to use the current sense feature, you only need to supply power to VCS. You can use the 5V(out) pin to supply power to VCS for this current sense feature. Please note the warning on the driver’s product page about instantly destroying the board by shorting the V+ and 5V(out) pins!
-Derrill
Derrill,
Our goal is to use this driver to power a small electric vehicle where the PWM signals will be provided by a Teensy. We plan to send the signals from the Teensy through a 5v level shifter into the PWMH and PWML pins to enable the drive-coast feature. Does the PWM logic reference 5V or will the use the battery voltage as a reference when trying to give the duty cycle?
Thanks,
Zach Rowland
We spoke on the phone about your question, but I will repeat the information here for others that might read this post.
As we state on the driver’s product page, the logic connections (including the PWM inputs) are designed to interface with 5V systems (5.5 V max); the minimum high input signal threshold is 3.5 V, so your logic level shifter is a good idea.
-Derrill
Derrill,
My senior design group from Trine University is using this board to power our battery electric car for the Shell Eco-marathon competition. We were wondering if there is a schematic of the board somewhere that has the components listed? The transistors and current sense chips are listed on the site but don’t see anything else. Would you be able to provide us the schematic at all?
Thanks,
Zach Rowland
We do not share the schematics or ICs used in those motor drivers. Is there a particular reason you are interested?
-Derrill