TPS63060： TPS63060DSCR function abnormal

Hi,

I think you are landed in the wrong forum :-)

Kai

Hi

could you confirm that if the issue is not caused by assembling issue.

Dear Sir,

Could you please share the schematic and the pcb layout with us?

We have encountered this problem for the first time since the production of this project in 2013. We feel very confused. The schematic diagram can be provided!

We have been producing this machine since 2013 and we have never had such a problem!Besides, during the test, the abnormal machine can work normally by replacing this IC. Therefore, our preliminary analysis is that the IC function is abnormal!

Hi Kai,

When Vin=5.7-7.6V , Vo=3.4V, it works in the buck mode, I noticed there's a 100uF cap C6 at the input side, Is this an EL cap? what is the ESR of it.

By the way, could you please also share your pcb layout with us?

HI: Sir
 C6 bit is a patch aluminum electrolytic capacitor, its specification is: 100UF/16V 6.3*5.4mm ±20%

              ：The attachment is PCB design information

PRSMAG gerber.rar

Hi：Sir
            Have you solved the problem I feedback? How long is it expected that you can reply to me? Our customer is in a hurry to need this batch of machines.
                                                                                                                                                                                                            thanks!

Dear Sir,

Sorry, I'm very very busy recently. Gerber file is hard to check. I need the .pcb source file. So that I can see each power component clearly.

Be noted that the input cap should be placed very close to the Vin pin and the GND pin.  the output ceramic cap should be placed very close to the Vout pin and the GND pin.  Put as many vias as possible at the GND net of the input and output caps, so that the high frequency AC current can go back to the silicon's PGND with a lowest impedance.  The feedback network should be connected to the AGND. The AGND and the PGND should be single point connected.

Dear Sir,

We have been chasing customers for a long time before we get the PCB source files. Customers are very anxious, please analyze as soon as possible, thanks!Emis_v2.zip

Dear：sir

     Customers have some doubts about the suggestions given by TI. I hope to connect with you directly. Can you tell me your email? I transfer it to the client, so that you can communicate and improve efficiency.

This is customer feedback:

     Dear, Agnes.
My engineer replied about TI engineer message:

"The TI engineer gave his recommendations .... but he did not answer the question of why the board works fine when powered up to 6 V.
There is grounding under the IC, it is made on the red layer, where the earth test ground is also located.
The increasing in noise level and malfunction due to this, due to the far capacitors located far from the IC,
we would see during the operation of the motor, because at this time we have the largest consumption and noise from the motor.
But this is not noticed. 
But not switching on from a voltage of more than 6 V. is exist. The engineer at TI said nothing about this."

In your first post, you says " some IC input voltage 5.7-7.6 v range, can not work properly", but in your current post, you says  "the board works fine when powered up to 6 V."?

So what is true? Could you clarify it clearly?

I think what the customer means is why some ICs can be activated above 6V? Isn't it all wrong? Can you provide your email address or phone number? This allows customers to contact you directly, and can help customers quickly modify the design! Thanks

Dear：sir

       Can you tell me your email address? The client's anxious to move forward. Thanks!

I will share my email address through private message. Please accept my friendship request.

I have not received any TI related contact, please contact my email address privately: steven@leach-pcba.com, thanks!