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LM74610-Q1: Schematic design review

Danilo A.
Mastermind 27690 points
Part Number: LM74610-Q1
Other Parts Discussed in Thread: LM74610-DQEVM

Hi Team,

Our customer will use the LM74610-Q1 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 = 12V to 38V @ 20A
V2 = 5V @ 12A
V3 = 3.3V @ 18A
V4 = 3.3V_Aux @ 6A

OringCkt.pdf 

Initially, I noticed that the LM74610-Q1 is an automotive device and not qualified for aerospace application. I also noticed that each inputs has TVS diodes which may not be needed for their application. There is also R31 1k resistor at the cathode of U2 which is not included in the typical application circuit of the datasheet and LM74610-DQEVM evaluation module. Can you please confirm if there are other mistakes in the schematic diagram? 

Regards,

Danilo

  • +1
    TI__Guru 57737 points

    Hi Danilo,

    The  1kohms R31 resistor is not required. The input TVS is not required for LM74610-Q1 functionality but customer can have it based on their system requirements. Otherwise, the schematics look good to me.