TPS386000-Q1: Request for circuit diagram review and problem review

Hi, Ben

Thank you for your reply.

I asked the question before, but when the above circuit is configured and the operation is performed, the output of Resetn is not working at all.

I want to check the status of whether the IC itself is running, but is there a way to check it?

And the Sense4L/H is currently open, but is the cause of the non-operation not related to this?

Thanks.

Regards,

MJ

Hi MJ,

Is there a way you can tell me the voltages going to SENSE1, SENSE2, and SENSE3? 

You can GND both SENSE 4L and 4H.   

Is the /MR pin actually tied to the rail voltage?

I see that /RESET1, /RESET2, /RESET3 are tied together.  Are those signals being pulled up to the 1.8V via a pull-up resistor?

My suggestion is to test each channel to make sure they are operating correctly.  When the SENSE1, SENSE2 and SENSE3 are above (VIT- + VHYS), the /RESET signals should become deasserted. 

Correctly me if I am wrong, but is VDD set at 3.3V?

Ben

Hi, Ben

I have additional questions.

The timing chart below explains the reset operation according to the sense.

Is it correct that the reset pin output goes low when a voltage over 400mV is applied to the sense pin?

The timing chart appears to show that the reset pin goes high when voltage is input to the sense pin.

Please explain the timing chart above.

Thanks.

Regards,

MJ

Hi MJ,

Any updates with the customer's issue?  

Ben

Hi, Ben

Thank you for your answer.
The customer has confirmed that it works normally.
If additional issues are received, we will contact you again.

Thanks again for the quick reply.

Regards,

MJ

Hi, Ben

I have additional questions.

Regarding the circuit above, is the value of R64 connected to SENSE4H okay in O ohm?

Is there a problem in function or operation?

Thanks.

Regards,

MJ

Hi MJ,

Connecting a 0ohm resistor to GND on SENSE4H should be okay to do because the input of SENSE4H is high-impedance.  See below:

Ben