DRV2625: DRV2625 Auto Calibration and Diagnostics Process Failled Both

DEMBEGA Jean Camille Isidore

Prodigy 30 points

Part Number: DRV2625

Hey,

I am Evaluating DRV2625EVM-MINI Evaluation Board with an Linear Resonant Actuator whish spécification are:

-Vibration-Frecency: 2.5Grms@100Hz(Fact)

-Thermal Resistance: 15.3Ω

-Power Consumption: <300mW @2.23Vrms(Sine Wave)

-Response Time <30ms

Following this Specifications, i have to set Drive Time to 1/(2*Fact)=5ms (see DRV2625 Datasheet at Page 23). But DRIVE_TIME Registor can hold a maximum Drive Time of 3.6ms (see page 54)

I also Have to Set RATE_Voltage register to 0x64 Value as motor Rate voltage is 2.23Vrms. The Clamp Voltage is 2.23*sqr(2)<3.16V so I have to set CLAMP_VOLTAGE register to 0x95 Value.

Please see attached Data for other value that i use for other configuration registers.

Now, when i run Calibration Process (1000ms), the process failled with none Over-current, Over-Temperature or under Voltage detection. The Diagnostics Process also failled with None Error detection.

Am I done something Wrong? How can i Fixed these issues?

Thanks.

DRV2625 Process.pdf

over 5 years ago

0 DEMBEGA Jean Camille Isidore over 5 years ago

Prodigy 30 points

Part Number: DRV2625

Hey,

I am evaluating, the DRV2625EVM-MINI Evaluattion borad with an Linear Resonance Actuator whish specification are:

-Vibration Frequency: 2.5Grms@100Hz (Fact)

- Rated Voltage,2.23Vrms

-Response time <30ms

-power consumption <300mw@2.23Vrms (Sine Wave)

Following these specifications, i have to set Drive Time to 1/(2*Fact)=5ms (see DRV2625 Data sheet at page 23). But the maximum Drive Time Allow in DRIVE_TIME Register for LRA actuator is 3.6ms (see Page 54)

to Get a Rated Votage of 2.23Vrms, I have to set RATE_VOLTAGE register to 0x64 value. The Clamp Voltage is 2.23*sqr(2) < 3.16V so i have to set CLAMP Voltage to 0x95value.

Please See attached File for other Value Configuration register that i used.

Now, when i do Calibration (1000ms) it failed with none over-current Dection, over-temperature or Udervoltage detection. Diagnostic Process Failed with none Error Detection.

Am I do something Wrong?

How can i resolve this issue?

Thanks

0 Ivan Salazar over 5 years ago in reply to DEMBEGA Jean Camille Isidore

TI__Guru** 100965 points

Hi Jean,

We'll check your issue description, but in the meantime: Is your actuator attached to a mass during Calibration/Diagnostics?
If the actuator is not fixed to a mass, the vibration feedback might no be correct.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 DEMBEGA Jean Camille Isidore over 5 years ago in reply to Ivan Salazar

Prodigy 30 points

Hey Ivan,

Thanks for your reply,

Actually, The Actuator is not attached tu a mass. i'll try with an attached Mass.

Thanks.

0 Ivan Salazar over 5 years ago in reply to DEMBEGA Jean Camille Isidore

TI__Guru** 100965 points

Jean,

Please let us know how this test goes.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Ivan Salazar over 5 years ago in reply to Ivan Salazar

TI__Guru** 100965 points

Hi Jean,

Did you got a chance to test the device with a mass attached to the actuator?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

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DRV2625: DRV2625 Auto Calibration and Diagnostics Process Failled Both