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INA301-Q1: TIDA-00795: INA301 in Transparent Mode

TI-CSC
Genius 15430 points

Part Number: INA301-Q1
Other Parts Discussed in Thread: TIDA-00795, INA301, INA300

Hello E2E Experts,

I am trying to analyze the application of this board in TIDA-00795 board of Texas instruments.

There they are using this INA301 in transparent mode,but still getting it working as an efuse,Can you clarify in this regard?
 
How this functionality is achieved without using latching mode,wont it go into a toggling stage when current above threshold is detected if it is not latched.Can you briefly explain to me this functionality?
 
I feel a micro controller should be involved here to ensure its working as an efuse.
 
Regards,
TICSC
  • 0
    TI__Mastermind 19155 points

    Hello TICSC, 

    This reference design does advertise using the INA300 in transparent and latched mode. There is also a note in this reference design on when latch mode is recommended to prevent high currents flowing into the circuit during overload conditions.

    There is a microcontroller in the block diagram to illustrate that they will need to use a microcontroller to control the latch pin. So for a true E-fuse design, we recommend connecting the latch pin to VS. 

    This would force the microprocessor to rest the latch after the OC event occurred. 

    So overall, your customer is correct and we recommend latch mode with a microprocessor for handling the latched OC event. 

    I hope this helps, 

    Joe