DRV8210: Set VCC, MODE and EN at the same time from same GPIO

Mats Cederblad

Part Number: DRV8210

HI,

Using the DRV8210 but like to save GPIOpins , is it possible to both set supply VCC, MODE and EN pins at the same time from same GPIO pin and just before doing that also select PH high or low for forward or reverse of the motor.

regards

Mats

over 1 year ago

+1 David Medis over 1 year ago

TI__Mastermind 19300 points

Hi Mats,

That shouldn't be an issue, as long as enough power is supplied to the pins within the recommended operating range. It would be recommended to test this for yourself to verify all timing requirements are sufficient for the application.

DRV8210EVM Evaluation board | TI.com

There are some timing restrictions when exiting sleep mode. Please see the datasheet for more details to verify if these conditions are relevant for your implementation.

DRV8210 data sheet, product information and support | TI.com

Best,

David

0 Mats Cederblad over 1 year ago in reply to David Medis

Prodigy 10 points

What happens when VCC, EN and MODE is set low to but still has VM , will the motor go in to Break or Coast ? . Thinking of drive the motor with a specific pattern of pulses (not using PWM) and don´t want the motor drive go into brake between those pulses.

regards

mats

0 David Medis over 1 year ago in reply to Mats Cederblad

TI__Mastermind 19300 points

Hi Mats,

Switching from the Forward state to the Brake state does not imply that the motor will "brake". Both Brake (slow decay) and Coast (fast decay) are current recirculation techniques to help dissipate the current in the load safely.

It is recommended to switch between Forward/Reverse and Brake as it is an efficient recirculation method when driving a motor.

When MODE is set low, the control mode is set to PWM.

To see all the control tables please see section 8.3.2 Control Modes in the datasheet.

For more on Current Recirculation and Decay Modes, see the following application report:

Current Recirculation and Decay Modes (Rev. A)

Best,

David

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DRV8210: Set VCC, MODE and EN at the same time from same GPIO