TPS22811: how to proper enable the controller from a microcontroller

user5983645

Part Number: TPS22811

Hi all.

I want to turn on/off the power to a servo.
The datasheet only talks about resistor dividers on the EN and /EN pins.

What is the proper way to turn the powerswitch on and off from a microcontroller pin?
And do I still need all the resistors?

over 2 years ago

0 Kunal Goel over 2 years ago

TI__Guru* 79181 points

Hi,

You can connect uc pin directly to EN /EN pins. You don't need resistors then. Just ensure that EN pin is not floating while device is having VIN supply. Resistors divider way is also a possible way where you don't need uc and use input supply.

Regards

Kunal Goel

0 user5983645 over 2 years ago in reply to Kunal Goel

Prodigy 85 points

Connect to both pins? And can I also do both? Resistor divider and uC pin?

0 Kunal Goel over 2 years ago in reply to user5983645

TI__Guru* 79181 points

It depends on your application. You can connect both to uc. You can also ground /EN pin, that will disable overvoltage protection feature. You can use both resistor divider and uc also.

How much max voltage servo can tolerate? Can supply voltage go beyond servo max rating?

Regards

Kunal Goel

Power management

Power management forum

TPS22811: how to proper enable the controller from a microcontroller