TPS40170: TPS40170-EP crank simulator

Anbarasan Muthu

Prodigy 70 points

Part Number: TPS40170
Other Parts Discussed in Thread: LM5145

Hello TI team,

We just want to verify the component placement in our PCB for TPS Crank Simulator unit.

We have 4 layers in our PCB

Layer-1 Top layer (Signal)
Layer-2 Power 3.3V
Layer-3 GND
Layer-4 Bottom Layer (Signal)

The below image from our PCB represent the DC-DC convertion components location by using the TPS40170 IC.

We have attached the PCB output files in PDF & Gerber files. We would like to know all the parameters are followed interms of component placement.

We are expecting the feedback from TI for the below

Do we need any modification in component placement.
TPS40170, Filter capacitors and Mosfets are placed in EMC Shield, Please cofirm us those components placed inside the shiled is right or wrong.
Based on the TI confirmation we shall proceed the manufacturing of this board.

_PCB_4L.zip

Please Let us know if more details required.

Regards,

Anbarasan M

over 2 years ago

0 EricLee over 2 years ago

TI__Guru 50121 points

Hello Anbarasan

1. It is hard to guess which component is which.... In general, the components around the IC are too far away from the IC now. Please place VIN, BOOT and VBP capacitors close to the IC. And please place bottom feedback, Bottom UVLO, FB, and RT resistors close to the IC too.

2. Usually, input filter components are placed outside of the shield. And the rest of components including the power inductor are placed inside the shield.

3. Customers are responsible for component selections and layout design, as well as validating and testing their design implementation to confirm system functionality.

- Eric Lee (Applications Engineering)

0 Timothy Hegarty over 2 years ago

TI__Guru 57412 points

Take a look at this reference design:

https://www.ti.com/tool/AUTOCRANKSIM-EVM

By the way, the LM5145 is now preferred over the TPS40170 (lower cost, better performance). It has the same voltage-mode architecture and compensation, so it should be an easy replacement.

Regards,

Tim

+1 EricLee over 2 years ago in reply to Timothy Hegarty

TI__Guru 50121 points

Hello Anbarasan

If possible, please post the schematic together with the Gerber file next time.

-- Eric Lee (Applications Engineering)

0 Anbarasan Muthu over 2 years ago in reply to EricLee

Prodigy 70 points

HI Ericlee,

Thank you for your sugestions, We will share schematics with Gerber file.

Based on the previous comments by TI we have changed the placement of the components relevant to TPS40170.

Kindly revert us if any flaw to be addressed.

Its a four Layer board.

Layer1- Signal Layer (Top)

Layer2- Power 5V Layer

Layer3- GND Layer

Layer4- Signal Layer (Bottom)

4527.Project Outputs for Free Documents.zip

Thanks & Regards,

Anbarasan M

Ph No : 9677038538

0 Anbarasan Muthu over 2 years ago in reply to Anbarasan Muthu

Prodigy 70 points

Hi EricLee,

PDF Doc missed, I attached it here.

Job1 (1).pdf

0 EricLee over 2 years ago in reply to Anbarasan Muthu

TI__Guru 50121 points

I am out of office now. I will reply as soon as possible when returning back.

-Eric Lee (Applications Engineering)

0 Anbarasan Muthu over 2 years ago in reply to EricLee

Prodigy 70 points

Hi EricLee,

Thank you for your info. We planned to use LM5145 Chip. We are working on it. I will share the Schematic ASAP for your reveiew. Please ignore previous support requests.

Thanks,

Anbarasan M

0 EricLee over 2 years ago in reply to Anbarasan Muthu

TI__Guru 50121 points

Hello Anbarasan

Please create new thread if you need LM5145 design review.

I am closing this thread. Thanks

-Eric Lee

Power management

Power management forum

TPS40170: TPS40170-EP crank simulator