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Original question:

BQ24195L: Boost Mode Operation Current Adjustment

BQ24195L: schematic of circuit for particular input output value and Boost Mode Operation Current limiting

dilshad khan
Prodigy 20 points
Part Number: BQ24195L
Other Parts Discussed in Thread: BQ24195, TPS2511

Hi,

I want to use bq24195l to make a power bank circuit I'm a automation engineer i don't have pcb designing skills i want a complete schematic for pcb using bq24195L the requirment of design are followings.

1) input is 5.1v and current is in between 2 to 2.5amp.

2)I also want current limiter at out pmid pin to avoid overloading and short circuit in boost mode.

  • 0
    TI__Expert 8230 points

    Hello Dilshad,

    dilshad khan said:
    input is 5.1v and current is in between 2 to 2.5amp.

    Are you referring to 2A-2.5A of charge current or OTG current? The bq24195 supports up to 2.1A of OTG current while the bq24195L supports up to 1.3A of OTG. 

    I recommend reviewing the files provided for the bq24195EVM, which include schematic and layout for this device. You can find them here.

  • 0
    Prodigy 20 points

    thank you for the suggestions of my first question(schematic diagram) after bit of study i found that i can use TPS2511 to limit the output current of bq24195l but i have one more question that i want to connect the output of tps2511 to smartphone but I'm also adding OTG feature in my power bank for that I'm adding one female usb2.0 connector and i want to connect that to smartphone usb(output of tps2511) so i confused Here that could i connect two usb D+ and D- pins to single tps2511 output whether it will affect on operation or not.

  • 0 in reply to dilshad khan
    TI__Expert 8230 points

    Hello,

    dilshad khan said:
    i confused Here that could i connect two usb D+ and D- pins to single tps2511 output whether it will affect on operation or not.

    I need further clarification here.The bq24195L can operate in one mode at a time: OTG or charging mode. If the power bank will use the 195L OTG to provide a 5V output to charge a smartphone, the D+/D- lines of the smartphone should be connected to the D+/D- lines of the TP2511, which would identify the port as DCP. In a dedicated charge port powerbank application (DCP), the expectation is that no data will be exchanged between smartphone and powerbank.

    If your application requires the smartphone connected to the powerbank to be able to exchange data via D+/D- with a host, you would need to add a USB D+/D- mux that would disconnect the lines from the TPS2511 after insertion and connect them to the host for data exchange.