Power supply USB C Lenovo Model: ADLX65YDC3A

Status
Not open for further replies.
S

student8b

Newbie
Joined
Apr 1, 2009
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,282
Hi
I have a problem testing the power supply. I connected the resistor R visible in the diagram. The resistor can be values in the range from 2k4 to 7k5 and then we have output voltage 5V. I have a question how to get a voltage of 20V? I don't have any idea. I tried with different resistors but to no avail. I have also used various Lenovo ThinkPad schemes but they are not clear to me.





 

Attachments

  • schemat2.jpg
    37.9 KB · Views: 187

Sort by date Sort by votes
As far as I'm aware of, the resistor programming can only modify the current delivery at safe Vbus of 5 V. To negotiate a higher Vbus up to 20V, a digital communication protocol through CC pin has to be implemented. See USB C spec for details, chapter 4.6 Power.
 

Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…