Hello Frischer,

What is the device you attached in the EVM type C connector ?   Is that the type C phone ?  I suggest you check the VBUS (test point ) whether it have 5V output . 

I am afraid your test device is not the type C compliance device .   Could you just add the shunt to J4 to 5.1K and add the E-load on VBUS to load 3A check whether it can work again ?  Any update is welcome. 

Hi Michael,

Thanks for the feedback.  We are using a Triport Apple USB C connector and multiple devices  down stream on the USB C port and the USB A port and nothing (smartphones and batteries).  The input power is 16.7v and .332 A in a controlled environment for 5.5 watts.  We have tried the J4 shunt and nothing.  Boosting to 3A does not seem to fit out protocol.    We tried the downstream terminal block and nothing as well.  

Any other ideas !

Thanks !

Hello Frischer,

We have use the Google Pixel 2 which is the type C standard phone . If we change the CC broadcast in J6(CTL0/1=10 or 11 ) then the phone charging current will change accordingly .  Pls. make sure your test device is the standard type C compliance . 

Hi Michael,

Mot sure of the context....the description calls for charging only as below with no shunts on J4 and J5...and for J6 are you suggesting adding shunts to both, as to low.. 

Michael,

We have been able to see the issue, since we have connected the USB C  (up and down) and in the down position, the USB C port does not recognize the connection. This should not be the case, since the USB C should not care which way the connector is inserted into the UDB C port. This is probably the cause for why there is no down stream power supply.  I have requested for the EVM to be replaced, as we have discovered at least one possible error in the EVM.

Thanks, Paul

Hi Paul,

If you use the type C device attached you don't need to put the shunt in J4 or J5 as the type C device can present the Rd in the CC1 or CC2 . 

So you have see the 5V when you attached the test device in the type C connector ,right ? 

The idea for put the shunt in the J6 is change the CC1/2 broadcast (CTL1 and CTL2 true table in datasheet)  charging current capability  , you can find the CC1 in our test waveform the CC1 voltage is change from 1.8V(3A) to 1V(1.5A) then the phone charge current will change from 3A to 1.5A  accordingly. 

I can't find your test waveform, if we can see the CC1/2 , VBUS, IBUS is helpful for analysis . Any way you can change other EVM to try it again . 

Michael 

Best regards!

Michael,

Please confirm with TI that I can change out this EVM for another one....The people who can do this seem confused as to your response...

I have explained the issue is with the USB C is a FUNCTIONAL PROBLEM, and that we have two different results from the same adapter depending upon if adapter is inserted up and down.

As you can see from the LED output,,,first position direction provides only Blue, which is an error, and the second position direction provides green and blue which is correct. 

In either case, NO POWER is coming through the adapter in either direction, and we have tested the same result with the shunts on the Ctrl and off the Crtl, with the same functional issue.

Please confirm a replacement for this EVM, as soon as possible...Thanks, Paul

Hi Michael,

We did some additional testing for you  to check the 5v on the J1 downstream output, with multiple battery chargers, and the results were fine, 

THE ISSUE is the USB C connection....regardless of what configuration we do, there is no output from the USB C and we get the error result from the connector as a result of the direction (as shown in the photos sent previously)  based on how the adaptor is connected (up or downside), which should NOT  be the case.

Please authorize a Replacement as per our return request, as we need to have a properly working downstream USB C port for us to fully test.

Thanks, Paul

Hi Paul,

Look at  your two test picture the result should be fine. The Blue LED is connect LD_DET pin (device attached )  and the Green LED is POL pin (direction of the attached) you use the adapter attached up and down in difference direction ,so the POL is on and off  that is make sense and the result is within our SPEC. 

I am still suspect the EVM is good. Could you help to confirm  the "VBUS " test point voltage is 5V or not when you attached adapter ?  Could send me the waveform with VBUS, IBUS CC1 and CC2 channel when you attached the adapter ?  We real need the waveform , thanks!

I am real want to solve your issue but I need to confirm the EVM behavior  first , sorry for bring your inconvenience.  

Michael Tan

Hi Michael,

As we stated earlier, and with the customer service team we do don't run an oscilloscope at our facility, and only do Functional testing on the devices, and so we do not have the capability to send a wave form.

We did some additional device tests for you, using a straight through USB C to USB A to see if there was power pass through, and compare to the Apple Triport connector.

We had the following results...1) NO Power passes through the Apple Triport, on the USB C or the USB A ports, UNDER ANY CONDITIONS.

    2) Yes, we could get power for charging a standard lithium battery on a straight pass through cable from the EVM USB C port, through a USB C to USB A cable,

                                                 3) NO Smartphone would charge on the USB C to USB A that we used to charge the lithium battery.

Which leads us to believe one of the VBUS, IBUS CC1 and CC2 are not working properly, and perhaps the CC1 or the CC2, as we cannot get the Apple Triport to work under ANY conditions, and we cannot get any smartphone to charge under ANY conditions using either cable adaptor.

Please decide what is defective, as clearly something is not working, as we need a working USB C port from the EVM to test for smartphone charging, and need this EVM replaced.

Thanks, Paul

Michael,

One additional test...we used a volt meter to test the output from the USB C to the battery, and we measured a range from 3.5v to 5v...as we varied the amount of volts and amps....our understanding was the output would be fixed at 5v....coming from the USB C port....

Thanks, Paul

Michael,

I have talked with our technical team, and they believe the same issue that is preventing the Apple Triport to work under any conditions  (HDMI USB C, USB A), and the fact that we CANNOT get a smartphone to charge, maybe the same issue in the EVM.

You mentioned that you tested a Google Phone,,,have you tested and iPhone....

Maybe you will have the same problem, and either-way, we will need at least a new EVM to test.

Thanks, Paul