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TPS24720: schematic design review

Danilo A.

Mastermind 26710 points

Part Number: TPS24720

Hi Team,

Our customer will use the TPS24720RGTT in aerospace project. He would like to ask for design review of their schematic diagram which I attached below.

Here are the specifications of their application.

Ambient temp, 85 deg C.

V1 = 5V @ 12A
V2 = 3.3V @ 18A
V3 = 3.3V_Aux @ 6A

CurrentLimiter_TPS24720RGTT.pdf

Initially, I noticed that the TPS24720RGTT is an industrial grade device and not for aerospace application. I also noticed that the SL1 to SL5 resistors are in 0805 package which may not be able to handle 6A, 12A ad 18A load current. Can you please confirm if there are other mistakes in the schematic diagram?

Regards,

Danilo

over 2 years ago

0 Avishek Pal over 2 years ago

TI__Mastermind 30915 points

Hi Danilo,

Thanks for reaching out. We will review the design and get back to you by tomorrow.

0 Avishek Pal over 2 years ago in reply to Avishek Pal

TI__Mastermind 30915 points

Hi Danilo,

Please see the observations below.

V1 = 5V @ 12A: Place SMCJ7.0A across VCC to GND. Remove D3 and D4. Place MBRS330T3G or equivalent across OUT to GND.

V2 = 3.3V @ 18A: Place SMCJ5.0A across VCC to GND. Place MBRS330T3G or equivalent across OUT to GND.

V3 = 3.3V_Aux @ 6A: Place SMCJ5.0A across VCC to GND. Place MBRS330T3G or equivalent across OUT to GND. C41 should be 40 nF.

0 Danilo A. over 2 years ago in reply to Avishek Pal

TI__Mastermind 26710 points

Hi Avishek,

Thank you very much for your suggestions.

Regards,

Danilo