TPS61235P: CC Feature

Hi Andy,

Thanks for reaching out. If you don't want the output current is larger than 3A, you still need to use the cc feature to limit the current, otherwise the maximum output current is decided by internal current limit which is larger than 3A. If not, you can disable this feature.

For the other question:

Andres Perez said:

Does this mean that if the load draws more than 3A then it would lower the output voltage?

Yes, your output voltage will be lower if the output current is larger than the current limit you set. You can set larger current limit or disable the cc feature if you don't care about the maximum output current. 

Best Regards,

Nathan

Would it be a significant voltage drop? I do not think my rasberry pi 4 load will draw over 3A so I am not sure whether to go with the CC feature or not. What would be safer.

Hi Andy,

The CC feature is used to protect your load when the output is larger than the current limit accidently, for example, when VOUT pin is short to ground, to achieve this it has to decrease VOUT. If your load doesn't draw over the current limit you set in normal conditions, the VOUT will not drop.

Best Regards,

Nathan

So when current is accidently higher than the limit, what will happen to the current as the voltage drops?

Hi Andy,

If it occurs, output current will be clamped to the value you set.

Best Regards,

Nathan

Then what would happen? Would the voltage regulate back to 5V ? or will the boost constantly just output the lower voltage? Confused as to how this feature would regulate it back to 5v/3A if that were to be my ideal output.