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TIDA-01093: Saperating Tida-01093 Schematic in 2 sections , control & Power

smash Micheal
Intellectual 1000 points
Part Number: TIDA-01093
Other Parts Discussed in Thread: BQ76930

HI,

Am attaching schematic of Power card which i have saperated from schematic of Tida-01093, 

Following sections have been removed:-

1.) Mosfer & Its driver section.

2.) Charger detect section .

3.) Load detect section.

Wanted to share with you all , if my control card section will work or not without the removed sections , please comment ?

Also wanted you all to comment if i have selected proper nodes in schematic from where i can saperate the circuitry , and still my control section should work properly.?

Also share your comments  is it a good idea to saperate control & power Board?  I mean to ask is will i have to face any issue in performance or not? Please comment.

Waiting for your comments....\

Rohit KadechaSchematic_mosfet.pdf

  • 0
    TI__Guru 54715 points

    Hi Rohit,

    The schematic I found attached is for the MOSFETs, a wake circuit (Section A) and a load removal detection scheme (Section B).

    In general you can separate circuitry onto different boards, but should consider the circuit in partitioning.  Filters for inputs should be near the IC.  An IC should have all support signals provided on the board.  Current loops should be small for important functions.

    From the MOSFET page the turn off of the MOSFETs may be considered an important function, you typically want a a fast turn off so a small loop for the turn off current.  Keeping this on one board is good, the signaling and turn on voltage will come from external to the board, the turn off loop is contained.

    From a standpoint of filtering near the IC, the SRP/SRN filter is on the MOSFET board.  It may be better to move this to the IC and locate these near the BQ76930 bringing Kelvin connected signals back to the sense resistor R97. You do want the Kelvin connected signals, don't pick up BAT- anywhere it is available.