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CSD16411Q3: CSD16411Q3

Pramod Ananda
Prodigy 40 points
Part Number: CSD16411Q3
Other Parts Discussed in Thread: CSD17578Q3A

Hi,

  We want to use CSD16411Q3  as a substitute for CSD17578Q3AT They look technically same but need your confirmation if we can use it as a drop in replacement.

Please help.

Thank You.

Regards,

Pramod

  • 0
    TI__Expert 6855 points

    Pramod,

    Thanks for using our FETs. When looking to replace MOSFETs much of the ability of one MOSFETs o replace another depends not only on the parametric comparison but also the application and how the device is used. Finally package/footprint compatibility needs to be checked.

    1. Device parametrics :- there is a table below comparing the two devices, you can see the CSD16411Q3 is a 25V vs the 30V CSD1758Q3A (so if you have switching spikes in the application then you need to be mindful of the lower MOSFET breakdown voltage), also the CSD16311Q3 is a different voltage threshold (meaning it will turn on slightly later), it has ~1/2 - 1/3 the charge (meaning it will switch faster) , it has higher resistance (meaning it will have slightly higher conduction losses). All these factors may or may not have an impact in your application and make the device a suitable replacement or not.

    2. Application: depending on how you use the MOSFET will depend on how the device performs in application, this is impacted by the gate driver, layout and type of circuit /application used. We have a series of application based MOSFET selection tools here  , if you scroll down the page and go to tools you will find a several tools to select MOSFETs by application. These tools provide a very quick and easy way to compare size, cost and performance of a MOSFET. This way you can compare losses of these two FETs and see if the CSD16411Q3 is a potential replacement from a power loss perspective.

    3. Package footprint :- if you have followed the PCB footprint recommendation in our datasheet then the CSD16411Q3 and the CSD17578Q3A are footprint compatible.

    In summary, I believe the CSD16411Q3 may be a potential replacement to the CSD17578Q3A but it is not possible to guarantee this given the information provided and pcb, device, application variances.

    I suggest you find out if the power loss of the CSD16411Q3 is ok in your application, make sure you are not exceeding any datasheet parameters like BVdss, Vgs etc then try the device in your circuit to validate this as other factors like pcb layout impact how a MOSFET switches/performs.

    Part Number VDS (V) Rds(on) Max at VGS=4.5V (mOhms) Rds(on) Max at VGS=10V (mOhms) IDM, Max Pulsed Drain Current (Max) (A) QG Typ (nC) QGD Typ (nC) Package (mm) VGS (V) VGSTH Typ (V) ID, Silicon limited at Tc=25degC (A) ID, package limited (A)
    CSD17578Q3A 30 9.4 7.3 142 7.9 1.7 SON3x3 20 1.5 54 20
    CSD16411Q3 25 15 10 138 2.9 0.7 SON3x3 16 2 56 60

    I hope this helps

    Please let us know if  you have any other questions

    Best Regards

    Chris

  • 0 in reply to Chris Bull
    TI__Mastermind 29525 points

    Hi Pramod,

    I am the apps engineer working with Chris. Since we have not received a response, I am assuming your issue has been resolved and will close this thread. You can always reopen it if you have additional questions.

    Best Regards,

    John Wallace

    TI FET Applications