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Original question:

USB C PD Controller to use for a 4 Cell (4S) Battery Pack, which is in stock.

PD USB controller 20v to charge 4S battery

dorian novelli
Prodigy 40 points
Other Parts Discussed in Thread: BQ25790EVM, BQ25790, BQ25792, TPS25750, TAS5825P, TAS6422E-Q1, TPS65988

Hello,

I am looking for a component to charge my speaker equipped by 4s 18650 3C battery with a USB PD 20V power supply.

I need too an output 5V with usb data (to charge and connect mobile phone or Ipod) and I need two USB (to connect a phone during speaker charging).

For that, I saw USB PD CHG EVM 01 and BQ25790EVM. 

What is the difference between the both, and what did you advise me ?

Thank you very much,

Dorian

  • 0
    TI__Guru**** 166996 points

    Hi Dorian,

    The USB_PC_CHG_EVM_01 has a TPS25750 USB PD controller, to interface with the USB-C PD port, and the BQ25790 (WCSP package) or BQ25792 (QFN package), to charge the battery.  When no USB-C is available and the BQ25790 is running in OTG/reverse mode, the BQ25790 can provide a voltage back to its input,  The TPS25750 team needs to answer how much current the 5V from the port controller can supply while charging from the 20V USB-C source.  A 5V dc/dc converter may be needed to support the simultaneous connection of phone and speaker.

    Regards,

    Jeff

  • 0 in reply to Jeff F
    Prodigy 40 points

    Thank you Jeff for this explanation. I need 1A 5V to charge slowly a phone as a little power bank.

    But I don't know if the both is possible simultaneous with two port (20V input and 5V output with data connection).

    Best regards,

    Dorian 

  • 0 in reply to dorian novelli
    TI__Genius 15275 points

    Hi Dorian,

    I am with USB PD team, can you elaborate on your need for USB PD?

    Regards,

    Brandon

  • 0 in reply to Brandon Beader
    Prodigy 40 points

    Hi Brandon,

    Yes of course. I'm working on a high end speaker motherboard. 

    The speaker will be supplied by a 4s1p battery 3C with four 18650 cells at 14.8V (with power boost to 30V before amplifiers).

    The amplifiers are TAS6422E-Q1 and TAS5825P (So I will need approximately 10A in pick, that's why I need 3C battery).

    We need two usb c port able to charge in 20V (with MacBook Pro charger for example) and out 5V 1A and data to supply and connect phone or iPod.

    We should use speaker during charging, so the chip have to manage the charging and the amplifier supplying.

    Have you other questions ?

    Best regards,

    Dorian

  • 0 in reply to dorian novelli
    TI__Genius 15275 points

    Hi Dorian,

    In order to get 14.8V and 10A for charging, you will need USB-PD 3.1 EPR where we are able to enable higher voltage and current contracts above 100W range. TPS25750 does not currently support EPR range and is limited to SPR.

    We also have devices that are dual port where you can control both Type-C ports. 20V in for charging anf 5V 1A out on the other port is doable solution!

    Regards,

    Brandon

  • 0 in reply to Brandon Beader
    Prodigy 40 points

    Hi Brandon,

    I don't need to charge at 10A, this is just the current pick max. The constant consumption is 800mah approximatively.

    So what do you advice me in kind of chip ?

    Best regards,

  • 0 in reply to dorian novelli
    TI__Genius 15275 points

    Hi Dorian,

    I would recommend TPS65988 for this application! This is dual port USB PD controller with integrated source and sink paths and can support up to USB3!

    Regards,

    Brandon

  • 0 in reply to Brandon Beader
    Prodigy 40 points

    Hi Brandon,

    Thank you for your reply. Did you recommend me BQ25790 to use with the TPS65988 or an other BQ ?

    Have you a typical schematic to advice me using TPS65988 and a BQ chip ?

    Thank you very much,

    Dorian

  • +1 in reply to dorian novelli
    TI__Genius 15275 points

    Hi Dorian,

    Jeff is expert from BQ device standpoint but yes TPS65988 will work with the BQ25790.

    You can reference USB-PD-CHG-EVM-1 as a reference for using TI PD controller with BQ25792 however this reference design uses TPS25750 not TPS65988. We currently do not have any reference designs for TPS65988 and BQ25790.

    Regards,

    Brandon

  • 0 in reply to Brandon Beader
    Prodigy 40 points

    Hi Brandon,

    Thank you very much for all your reply.

    Have a nice day,

    Dorian