RE: DRV8833: Sleep pin question

Hi David__ ,

0) The CC3200 operates with 3.3 volts. I've connected the nSLEEP pin to the CC3200's GPIO.

If I set the nSLEEP GPIO pin to high, which is 3.3V, does the motor driver runs (not sleeping)?

-- When nSLEEP is set to high, the device is active. The outputs operate according to Table 1 of the datasheet.

I can't find the threshold voltage value of nSLEEP pin to make the motor driver run.

--- the nSLEEP pin threshold is listed in the datasheet (Vil < 0.5V and Vih >2.5V)

1) Regardless of the value of AIN/BIN, is there no output when the nSLEEP pin is set to low?

-- The outputs are disabled when nSLEEP is set to low. This is stated in section 7.3.4 of the datasheet.

The CC3200's GPIO pins start at HIGH after it is powered on. This causes the motor to run after the power is on.

So I hope to add a strong pull-down resistor (2.7k Ohm) at the sleep pin to use it as an "ENABLE" pin, instead of adding 4 pull-down resistors on each PWM pins.



If the nSLEEP pin is low, does the output of DRV8833 goes off?


-- Yes the outputs are off when nSLEEP is low


2) Lastly, this motor driver causes heat. So I think this chip has to be apart from the CC3200 Wi-Fi MCU.

Is there a recommended "keep-out" distance when placing the DRV8833?

-- There is no recommended distance. The distance is dependent on the current through the DRV8833, the amount of copper to reduce the thermal, and the operational parameters of the surrounding devices.