DRV8313-Breakout

This is an unofficial Breakout Board for the Texas-Instruments DRV8313 Triple-Half-Bridge Motor Driver IC

Where to get it?

• eBay (EU shipping only)
• more platforms may follow soon

Specs

Property	Value
Input Voltage	8V - 48V
Input Current (peak)	3A
PWM Phase Inputs	3
Enable Pin	1
Reset Pin	yes
Sleep Pin	yes
Fault Indication Pin	yes
Output Motor Phases	3
Output to Supply Your MCU	3.3V

Hardware

PCB Top	PCB Bottom

Example with RaspberryPi Pico

In this simple example, the DRV8313 breakout board is used together with a RaspberryPi Pico to drive a brushless gimbal motor in an open loop configuration. Open loop means that we have no feedback on the motor angle. The motor is driven similar to a stepper motor with open loop control.
Three 120° phase shifted sine waves are fed in via the PWM pins of the microcontroller. The DRV8313 motor driver now amplifies the incoming PWM signal and uses it to drive the motor.
The output voltage to the motor depends on the input voltage of the DRV8313 and the duty cycle of the PWM signal.

Wireing

MicroPython Code

from machine import Pin, PWM
import math
import time


############################################################
# Note: all following service pins are inverted            #
#       therefore the 'n' meaning 'not' before their names #
############################################################
nFault = Pin(6, Pin.IN)   # not-Fault input

nSleep = Pin(7, Pin.OUT)  # not-Sleep output
nSleep.on()               # set to on to not activate sleep mode

nReset = Pin(8, Pin.OUT)  # not-Reset output
nReset.on()               # set to on to not reset the driver


# definition of enable and PWM pins
en = Pin(5, Pin.OUT)  # enable pin
en.on()               # set to on to enable the driver

pwm0 = PWM(Pin(2))    # PWM phase 1 pin
pwm0.freq(20000)      # frequency set to 20kHz (above the audible range)

pwm1 = PWM(Pin(3))    # PWM phase 2 pin
pwm1.freq(20000)

pwm2 = PWM(Pin(4))    # PWM phase 3 pin
pwm2.freq(20000)


##############################
# Custom Parameters          #
# adapt these to your needs! #
##############################
n = 1.0     # number of motor rotations
pp = 7      # number motor of pole pairs
pv = 1.0    # percent of input voltage (e.g. input is 24V; motor needs 12V; -> pv=0.5)
res = 200   # resolutoin/steps per field rotation


# definition of some constants and variables
step = (2*math.pi)/res  # step angle; amount of which the field angle is increased every loop
scale = 0.5*pv          # scaling factor for the sine wave
phi = 0.0               # angle of the electromagnetc field

# main loop
for i in range(int(n*pp*res)):
    phi = phi + step
    
    a = 65535 * (scale * math.sin(phi) + 0.5)
    b = 65535 * (scale * math.sin(phi+2.094395) + 0.5)
    c = 65535 * (scale * math.sin(phi+4.188790) + 0.5)
    
    pwm0.duty_u16(int(a))
    pwm1.duty_u16(int(b))
    pwm2.duty_u16(int(c))
    
    time.sleep_ms(1)  # adjust rotation speed


# after the loop finished after n number of rotations
en.off()   # turn off the motor driver

What's next?

If you want to go deeper into the topic of BLDC motor control, you should definitely check out the awesome simpleFOC project!
You can use this DRV8313 breakout board perfectly as a suitable BLDC motor driver.