LMZ31707: review schmatic

Chen Alex1

Expert 2035 points

Part Number: LMZ31707

hi sir

could you help to review the schmatic?thanks

thanksTI power module replace.pdf

over 3 years ago

0 Anthony F over 3 years ago

TI__Mastermind 35115 points

Hi Alex,

I have checked the schematic connections and have one comment. The AGND pin should not be connected to PGND on their board as the connection is done internally in the module. This is described in the pin functions table on page 7. After making this correction, some of the external components should be connected to the AGND pin net instead of DGND. Those components recommended to be returned to AGND are those connected to INH/UVLO, SS/TR, RT/CLK, VADJ, STSEL, OCP_SEL and ILIM.

Can you help provide some details how the external component values were selected? Was WEBENCH used?

Anthony

0 Chen Alex1 over 3 years ago in reply to Anthony F

Expert 2035 points

updated

TI power module replace_V2.pdf

0 Anthony F over 3 years ago in reply to Chen Alex1

TI__Mastermind 35115 points

Looks good. One thing I noticed is they will want to use different nets for the AGND of each device. Such as AGND1, AGND2, etc. They probably would have noticed this when going to layout their board.

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LMZ31707: review schmatic