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CSD17308Q3: Please help provide comparison table

Kygo Cheng
Expert 6830 points
Part Number: CSD17308Q3
Other Parts Discussed in Thread: CSD17578Q5A, CSD17578Q3A, CSD17581Q5A, CSD17576Q5B

Hi Team

There good new that we could DIN our CSD17308Q3,

And need you support following requirement to make sure DWIN ,THX

  1. Please help provide Rdson VS Drain current curve with CSD17308Q3
  2. Please help provide comparison with BSC0909NS and provide application suggestion and notice.

  • 0
    TI__Mastermind 34095 points

    Hello Kygo,

    Thanks for promoting TI FETs at your customer. The CSD17308Q3 is a 30V, 11.8mΩ max at VGS = 4.5V FET in 3.3x3.3mm SON package. Abs max VGS = +10V/-8V and on resistance is specified to a minimum VGS = 3V. Typical QG = 3.9nC at VGS = 4.5V. This is an older, higher cost device.

    The BSC0909NS is a 34V, 11.8mΩ max at VGS = 4.5V FET in 5x6mm TDSON package. Abs max VGS = +/-20V and on resistance is specified to a minimum VGS = 4.5V. Typical QG = 7.2nC at VGS = 4.5V.

    These are not footprint compatible packages. TI's footprint compatible package is 5x6mm SON. Our recommended cross reference is CSD17578Q5A, 30V, 9.3mΩ max at VGS = 4.5V. Abs max VGS = +/-20V and on resistance is specified to a minimum VGS = 4.5V. Typical QG = 7.9nC at VGS = 4.5V. This same FET die is also available in 3.3x3.3mm SON package as the CSD17578Q3A

    TI does not provide Rds(on) vs. Id curves in our FET datasheets. We only provide saturation and transfer characteristics as shown in Figures 2 & 3 in the datasheet. Please let me know if you have any questions.

    Best Regards,

    John Wallace

    TI FET Applications

  • 0 in reply to John Wallace1
    TI__Expert 6830 points

    John

    Thank you for the feedback!

    After discuss with customer , please help to provide what is the Rdson value when Id from 0A~16A?

    Customer needs this information ,otherwise they dare not use CSD17578Q5A & CSD17578Q3A

  • 0 in reply to Kygo Cheng
    TI__Mastermind 34095 points

    Hi Kygo,

    I can use the characterization data collected during product development for the saturation curves in the datasheet to create a plot of on resistance vs ID. On resistance is calculated (not measured directly), Ron = Vds/Id and it may not be as accurate. I will send this to you via regular email.

    Thanks,

    John

  • 0 in reply to John Wallace1
    TI__Mastermind 34095 points

    Hi Kygo,

    I sent you the plot via regular email. I will close out this thread. Let me know if you need anything else.

    Thanks,

    John

  • 0 in reply to John Wallace1
    TI__Expert 6830 points

    John

    Thank you for the feedback!

    Because customer needs comparison table, I have compiled the comparison table of CSD17578Q5A and BSC0909NS!
    Can you help to confirm it is ok? THX

    Please refer to following comparison table

     

    TI

    CSD17578Q5A

     

    BSC0909NS

     

    V_DS

    30

    34

    V

    V_GS(th)

    1.5

    2

    V

    V_GS

    ±20

    ±20

    V

    ID

    59

    44

    A

    I_DM

    132

    176

    A

    TJ

    -55 to 150

    -55 to 150

    °C

    Qg

    7.9

    7.2

    nC

    Qgd

    2

    1.8

    nC

    R_dson

    5.9

    9.2

    mΩ

    Coss

    136

    390

    pF

    Ciss

    1170

    1100

    pF

    Crss

    58

    25

    pF

    31GBSC090901 零件規格書.pdf 

  • 0 in reply to Kygo Cheng
    TI__Mastermind 34095 points

    Hi Kygo,

    This looks good to me.

    Thanks,

    John

  • 0 in reply to John Wallace1
    TI__Expert 6830 points

    John

    More question!

    Customers want to improve efficiency, so do we have solution like  CSD17578Q5A but the Rdson is around 3mΩ?

    THX

  • 0 in reply to Kygo Cheng
    TI__Mastermind 34095 points

    Hi Kygo,

    In this case, for 3mΩ, I would recommend CSD17576Q5B but it is a lot higher cost and QG is about 3X the CSD17578Q5A meaning there will be higher gate drive and switching losses. Another alternative is the CSD17581Q5A which is in between these two devices in terms of cost and performance. Is this for a sync buck converter? We have an excel-based sync buck FET selection tool available at the link below. This allows the user to input their requirements and compare up to 3 different TI FET solutions on power loss, $1/ku price and package. We have similar tools available for other applications as well.

    Thanks,

    John

    https://www.ti.com/lit/zip/splr001