WEBENCH® Tools/DRV8832: DRV8832

miaomiao hong

Part Number: DRV8832

Tool/software: WEBENCH® Design Tools

Hello support team:

I have some queston about DRV8832,Problems description as follows:

In the product testing some DRV8832 driver ability become weak , motor drive voltage use 3.3 v power supply. In the case of without motor,Output waveform is only around 1 v, normal chip output waveform in 3.3 v.

I want to know what reason causes driving ability weakened. Can you give me some advices?

Thank you very mush.

over 7 years ago

0 Rick Duncan over 7 years ago

TI__Guru** 114905 points

Hi miaomiao,

Can you provide additional information?
How many devices have this weakness? Out of how many tested?
How are you measuring the output waveform?
Can you provide scope captures of the outputs voltages for good vs bad?
Can you provide scope captures of the sense resistor voltage for good vs bad?
Do the outputs have capacitors connected? If so what value?

0 miaomiao hong over 7 years ago in reply to Rick Duncan

Intellectual 270 points

Hi Rick:
There are 100 test equipment, and there are 8 weakness.
The output waveform customers did not give me,I provide test waveforms as soon as possible.
The outputs have't capacitors connected. I want to know whether the capacitor must be connected. In the design of before connecting with capacitance, and DRV8832 did not appear weakness. There is different between design of past and now, this design not connected with the capacitor .

0 Rick Duncan over 7 years ago in reply to miaomiao hong

TI__Guru** 114905 points

Hi miaomiao,

Capacitors are not required on the outputs.
Capacitors on the outputs can create overcurrent conditions depending on the value.
Also some motors have capacitors inside the motor.

We will wait for the test waveforms.

Motor drivers

Motor drivers forum

WEBENCH® Tools/DRV8832: DRV8832