DRV11873: DRV11873PWPR

Adolf Lau

Prodigy 200 points

Part Number: DRV11873

Dear Sirs,

over 5 years ago

0 Adam Sidelsky over 5 years ago

TI__Guru 65330 points

Adolf,

Thanks for posting on the MD forum!

The device expert for this is out of office but they will get back to you this week.

Regards,

-Adam

0 Vishnu Balaraj over 5 years ago in reply to Adam Sidelsky

TI__Mastermind 24415 points

Hi Adolf,

Thanks for posting in E2E forum. This device is designed to operate in input voltages ranging from 5V to 16V. Do you see Rd pulled high when VCC = 7.10 - 7.15V and 7.45 - 7.48V? I still see some differences in your schematic versus the schematic in Chapter 9 fig 13. I don't know why you have connected 10 kohm resistor to PWM pin. What is IA?

Regards,

Vishnu

0 Adolf Lau over 5 years ago in reply to Vishnu Balaraj

Prodigy 200 points

Dear Vishnu,

Thank you for t

0 Adolf Lau over 5 years ago in reply to Adolf Lau

Prodigy 200 points

Dear Vishnu,

0 Vishnu Balaraj over 5 years ago in reply to Adolf Lau

TI__Mastermind 24415 points

Hi Adolf,

Are you increasing the supply voltage while the motor is spinning? Does your application have a variable Supply voltage? Are you able to see the same issue when you set the supply voltage to a value between 7.10 - 7.15V and 7.45 - 7.48V and spin the motor? What is the end application?

Regards,

Vishnu

0 Adolf Lau over 5 years ago in reply to Vishnu Balaraj

Prodigy 200 points

Dear Vishnu,

Thank you for the question

0 Adolf Lau over 5 years ago in reply to Adolf Lau

Prodigy 200 points

0 Vishnu Balaraj over 5 years ago in reply to Adolf Lau

TI__Mastermind 24415 points

Adolf,

I don't see any bug in the IC because as mentioned earlier this device is designed to operate in the entire operating range of Vcc. And you didn't answer to my previous question. Do you see Rd pulled high when VCC = 7.10 - 7.15V and 7.45 - 7.48V? Can you send the voltage and current plot to know more on what is happening?

Regards,

Vishnu

Motor drivers

Motor drivers forum

DRV11873: DRV11873PWPR