Charge indicator

MikeH

Other Parts Discussed in Thread: TPS2540

On the TPS2540 EVM the Vout-ON LED is connected to Vout which indicates when Vout is actually turned on. In DCP mode, is this an indication of "charging" (ie a device has attached and is charging) or is it merely an indication that voltage appears on Vout? In other words, does voltage appear on Vout if there is nothing attached in DCP mode?

Thx,

MikeH

over 14 years ago

0 Eric Wright over 14 years ago

TI__Mastermind 42795 points

This is a VOUT=ON indicator only.

0 MikeH over 14 years ago in reply to Eric Wright

Guru 15580 points

Eric,

The question is: when is Vout "on"? Is it ON only when a device is connected? or is it always ON?

0 Eric Wright over 14 years ago in reply to MikeH

TI__Mastermind 42795 points

Always ON except when EN is low or CTL 1..3 is 0,0,0. I ran through the CTL pin settings shown in the datasheet table and found this to be true.

0 MikeH over 14 years ago in reply to Eric Wright

Guru 15580 points

Eric,

Eric Wright said:
I ran through the CTL pin settings shown in the datasheet table and found this to be true.

Wow. Thanks for the back-handed RTFM. I "ran" through the datasheet several times and did not see a definite statement of the state of Vout based on device connection. I did find where Vout was OFF if EN is low. However this does not defnitively tell me if Vout is ON when devices are connected.

Also, if you don't mind. I would like to be the judge on whether or not your have answered the question.

MikeH

Power management

Power management forum

Charge indicator