I never used the TB67H303 and the PCA9685 chips before, so I would like to know if I made errors in my scheme.
By considering the TB67H303 datasheet, as reported in the Application Circuit (page 16) for Direct PWM mode, I tried to connect:
- pin 3 SELECT to LOW
- pin 7 STBY to the pin 6 of the PCA9685
- pins 8, 9 and 22 to pins 7, 8, 9 of the PCA9685 for motor control
- pin 5 Vref to pin 2 SGND as reported in the application circuit
- pin RSA, RSB, PGNDA, PGNDB to GND(12V)
- pin 6 VCC to +12V
I connected Pins A0 to A5 of the PCA9685 to a 5 way header so I can set the address by short-circuiting the related pins to +5V. I also connected pin 23 OE and pin 25 EXTCLK to GND. Is it correct?
This is my circuit, I hope it doesn't have too much errors :)