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How to supply a power to LaunchPad-F28377S?

Sehun Kim
Prodigy 90 points

Other Parts Discussed in Thread: TPS54383EVM, SN74LV4051A, INA326, DRV8835, DRV8833

Hi!

I checked the manual "sprui25a" with scheme. But, i think this manual is too simple to obtain enough information (Some parts in the scheme are difficult to understand).

I wonder how to provide a power for the LaunchPad-F28377S by an external power source!

Is it possible to give 3.3v or 5v external power to the LaunchPad?  How to configure the LaunchPad ?

In the scheme, +5V is generated by the IC (boost up from 3.3V input). Thus,  external power (+5V) may be not useful in this launchpad. (It can not generate 3.3V from external 5V).

please give information about it.  

  • 0
    Intellectual 610 points
    Hi Sehun Kim
    Power given from usb i.e launch pad connected pc via usb cable from this usb cable we are 5v after that 5v converted into 3.3v
  • 0 in reply to raghu gundaala
    Prodigy 90 points

    Thank you for your conaideration. My title of question may be confused you. I wonder How to use not usb power but external power for dsp.

  • 0 in reply to Sehun Kim
    TI__Mastermind 24955 points
    Sehun,

    You can supply both 3.3V and 5V external power supplies directly to the header pins. However, if you want to do this, you need to make sure you remove both jumpers on JP1 and JP2. This will isolate the board from the PC to ensure no electrical damage. Additionally, you want to make sure that you set appropriate current limits on both power supplies otherwise you could easily damage the microcontroller. Start with 250 mA on both rails and then increase in small amounts if necessary.

    I hope this information is what you were looking for. Please let me know if you need any additional information or clarification.
  • 0 in reply to Kyle Cousino
    Prodigy 160 points

    can u please tell me where i has to connect to the ground? when i'm applying 3.3v and 5v externally to jp1 and jp2

  • 0 in reply to Kyle Cousino
    Prodigy 160 points
    and i'm using the TPS54383EVM for converting 12v to 5v and 3.3v and it gives the o/p of 2A for each channel....how do i limit the current for both the channels? can anyone please tell me a solution for this..
  • 0 in reply to Kyle Cousino
    Prodigy 160 points
    and i'm connecting mux, motor driver and an opamp for the 5v rail and nothing to 3.3v rail except the f28377slaunchpad and msp-exp430g2.....so any one please give me a solution to my problem
  • 0 in reply to Kyle Cousino
    Prodigy 160 points
    I'm using the TPS54383EVM for converting 12v,2A 4000mah battery to 5v and 3.3v and it gives the o/p of 2A for each channel....
    i want to give supply from 5v rail to 8*1 analog multiplexer SN74LV4051A, 5 no.of motor drivers DRV8835, 6 no.of INA326 and LAUNCHXL-F28377S's jp5
    from 3.3v rail to LAUNCHXL-F28377S's jp4 and MSP-EXP430G2
    and i'm connecting another 2 motor drivers DRV8833 to 9v from the 12v battery using 7809 regulator and 4no. of TLO74 to the battery
    my question is...is it safe to connect like that? is the current from the battery is required enough to all the components?

    can u please tell me where i has to connect to the ground on LAUNCHXL-F28377S...when i'm applying 3.3v and 5v externally to jp4 and jp5 by removing jp1 and jp2.
    hope u understand my problem...
    please any one help me...
  • 0 in reply to Narendra kumar
    TI__Expert 5940 points
    Narenda,

    Please consider creating a new post whenever you have a new question. Old posts are generally closed and no longer tracked. You can provide the necessary information regarding your issue in the new post and include a link to this post if you'd like.

    Elizabeth