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TPD4S311: TPD4S311

Ian Wang
Mastermind 28105 points
Part Number: TPD4S311
Other Parts Discussed in Thread: TPD6S300, TPS25751

Tool/software:

Hi Sir,

customer asked how to execute charge protection using TPD4S311? Do you have reference design?

thanks, Ian.

  • 0
    TI__Mastermind 28900 points

    Ian,

    The TPD4S311 is an very simple device for protection of PD controllers.  

    The best reference schematic that I can offer is the EVM for the TPD6S300:  https://www.ti.com/lit/ug/slvuax4/slvuax4.pdf

    The implementation is identical to the TPD4S311 if you remove the D1 and D2 pins from the TPD6S300 design.

    Regards,

    Chuck

  • 0 in reply to Chuck Branch
    Prodigy 30 points

    Dear Chuck,

    1. What's the different between have the D+/D- or not ? to control something ?

    2. In our current design, the USBC is for charge out(only 5V/3A) and digital audio in.

    For the charge out this function, if we take the power bank to connect with this USBC port, it means two of sides will provide the voltage/current to charge, when power bank trying to charge out to us, how we do the protection? I don't think the TPD4S311 can do it, can it?

    Thanks.

  • 0 in reply to Kent Chu
    TI__Mastermind 28900 points

    Kent,

    I asked about D+/D- because we do not offer short to battery protection for them and I wanted to make you aware of this fact if you are using the DP/DM lines, you will need different protection.

    The TPD4S311 is used to provide over voltage and IEC esd protection for the CC and SBU lines of a type C system.  It is placed between the type C controller for the CC lines and the down stream device for the SBU lines if you are using an alternate mode or audio control over the SBU lines.

    VBIAS is a local capacitor for the ESD structures BIAS.

    The C_SBU1/2 and C_CC1/2 lines are connected to the type C connector. 

    The CC1/2 lines connect to the PD controller

    The SBU1/2 lines connect to whatever down streem connections you are using

    The RPD pins can be connected to the CC lines if your system needs to advertise dead battery mode for a sink.  

    VPWR is a 3.3V power supply (We use LDO_3V3 for any of our PD controllers because it is always powered, even in dead battery mode)

    /FLT is used to report fault conditions to the system MCU

    Regards,

    Chuck

  • 0 in reply to Chuck Branch
    Prodigy 30 points

    Dear Chuck,

    1. As you mentioned, for now I use D+/D- to receive the digital audio signal, then the TPD6S300 is more suitable for me, is it correct?

    2. But for the charge function as below description, is there any IC can do that? 

    'For the charge out this function, if we take the power bank to connect with this USBC port, it means two of sides will provide the voltage/current to charge, when power bank trying to charge out to us, how we do the protect it?'

  • 0 in reply to Kent Chu
    TI__Mastermind 28900 points

    1.  The TPD6S300 will provide IEC ESD protection for the D+/D- lines if that feature is desired.

    2.  For the function that you are describing, please look at the TPS25751.  It is a PD controller that has integrated support for a power bank.

    Regards,

    Chuck

  • 0 in reply to Chuck Branch
    Prodigy 30 points

    Hi Chuck,

    1. Ok, thanks. I think I need this one.

    2. Yon mean the PD controller can protect if external device want to charge to me?

    Here is a quick show our system, I transfer the 5V/3A for USBC to charge out by Buck, when connect the external device, there is only I can charge out, the external device cannot charge in, I think need to add IC to protect, is the PD controller can do that?

    For the D+/D- audio path I think you mentioned that TPD6S300 can protect that circuit.

  • 0 in reply to Kent Chu
    TI__Mastermind 28900 points

    Kent,

    For the system that you are showing, you should look at the TPS25830A family of parts.  It integrates the DC2DC, Type C, and short to battery protection in a single part.

    Regards,

    Chuck