TPS552872-Q1: Schematic Review

Mukesh k

Prodigy 215 points

Part Number: TPS552872-Q1

Tool/software:

Hi Team,

Could please review the design and share your comments?

Design Requirements

Input Voltage : 9-16V

Nominal I/P Voltage : 12V

Output Voltage : 12V

Output Current : 2A

Output Power (Max) : 24W

Ambient Temperature (max) = 85°C

Application : Automotive

/cfs-file/__key/communityserver-discussions-components-files/196/TPS552872_2D00_Q1-Schematic.pdf

9 months ago

0 Bryce Xun 9 months ago

TI__Mastermind 27910 points

Hi Mukesh,

Please also share the part number of the output capacitance, then we can check the COMP parameters,

BRs,

Bryce

0 Mukesh k 9 months ago in reply to Bryce Xun

Prodigy 215 points

Hi Bryce,

Please find the Output capacitance, PN : C3216X5R1V226M160AC.

Input Capacitance : CGA9N1X7R1V476M230KC, let me know if you require any other detail.

Thanks,

Mukesh

0 Bryce Xun 9 months ago in reply to Mukesh k

TI__Mastermind 27910 points

Hi Mukesh,

Got it, will reply to you later today.

BRs,

Bryce

0 Bryce Xun 9 months ago in reply to Bryce Xun

TI__Mastermind 27910 points

Hi Mukesh,

Please see my comments about the schematic below.

1. Recommend to add one 47uF aluminum capacitor at the input side to reduce input voltage ripple.

2. Short R7.

3. The net name on VIN pin is different from VCC_DC_IN, please check this.

4. Recommend to change R9=3.3k, C14=10nF.

5. Recommend to add one more 0.1uF/0402 cap close to Vout and GND pin.

6. Connect all signal pins' ground with GND, all power ground with PGND, and connect PGND with AGND at VCC cap ground at single point.

7. Follow the layout guideline.

BRs,

Bryce

0 Mukesh k 9 months ago in reply to Bryce Xun

Prodigy 215 points

Hi Bryce,

Thanks for the review; we'll implement the comments.

Could you please elaborate on point 4's recommendation for a better understanding of the comp circuit?

Regards,

Mukesh

0 Bryce Xun 9 months ago in reply to Mukesh k

TI__Mastermind 27910 points

Hi Mukesh,

Please find the attached calculation tool. You can find the bode plot result with point4 R9=3.3k, C14=10nF.

7673.TPS552872-Design Calculation Tool-V1.0.xlsx

BRs,

Bryce

0 Mukesh k 9 months ago in reply to Bryce Xun

Prodigy 215 points

Hi Bryce,

Thanks for the plot. We'll check and let you know if we have any further queries.

Regards,

Mukesh

0 Mulin Yuan 9 months ago in reply to Mukesh k

TI__Genius 15320 points

Hi Mukesh,

I will close this thread. If you have any queries feel free to reply and it will open again.

Regards,

Mulin

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TPS552872-Q1: Schematic Review