• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 3 answers
  • Subscribers 63 subscribers
  • Views 324 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ISO5851-Q1: Not connected pin

Guillaume THIEBAT
Prodigy 20 points
Part Number: ISO5851-Q1
Other Parts Discussed in Thread: ISO5851

Good Morning,

We use the ISO5851-Q1 device on our electronic board. Can you say me if the not connected pin (pin 4 : NC) is connected internally in the device ? Can I connected this pin to a signal, power supply or GND ?

Thank you

Best regards

  • 0
    TI__Genius 10652 points
    Guillaume THIEBAT said:

    We use the ISO5851-Q1 device on our electronic board. Can you say me if the not connected pin (pin 4 : NC) is connected internally in the device ? Can I connected this pin to a signal, power supply or GND ?

    Hi Guillaume, 

    The NC pin in ISO5851 is not connected internally. It is perfectly fine to float this pin or connect to ground. 

    If this answers your question, please let me know by pressing the green button. 

    Best

    Dimitri

  • 0 in reply to dimitri james
    Prodigy 20 points

    Hi Dimitri,

    To be sure, we want connected the NC pin to the gate mosfet by the R25 resistor like on the schema below (not to GND). Is-it OK for you ?

    Indeed, currently, we have big problem to supply the ISO5851-Q1. We want integrate an alternative of the ISO5851 which integrate a OUTH/OUTL pin.

    Thank you 

    Best

    Guillaume

  • 0 in reply to Guillaume THIEBAT
    TI__Genius 10652 points
    Guillaume THIEBAT said:

    To be sure, we want connected the NC pin to the gate mosfet by the R25 resistor like on the schema below (not to GND). Is-it OK for you ?

    That shouldn't be a problem, though I would suggest to minimize the resulting antennae by place R25 andR24 both close to the gate.

    . I assume that R25 is Not Stuffed / not populated when using ISO5851 

    Guillaume THIEBAT said:

    Indeed, currently, we have big problem to supply the ISO5851-Q1. We want integrate an alternative of the ISO5851 which integrate a OUTH/OUTL pin.

    Yes its hard with the supply shortages! This will be a good solution to support an entire family. ISO545x can also work as an alternative if the isolation rating is sufficient for your application. 

    Best

    Dimitri

  • 0 in reply to dimitri james
    Prodigy 20 points

    Hi Dimitri,

    In fact, we want integrate R25 with ISO5851. Indeed, the aim is to minimize our folder. With R25 integrated, the other device like ISO5852 or other will be only a second source of ISO5851. If we should populate or not the R25 according to the gate driver device, we should manage 2 electronic boards folder.

    Is-it possible to integrate R25 resistor with ISO5851 ?

    Thank you 

    Best

    Guillaume

  • 0 in reply to Guillaume THIEBAT
    TI__Genius 10652 points
    Guillaume THIEBAT said:

    Is-it possible to integrate R25 resistor with ISO5851 ?

    That should pose no issue. Its ok to do that if it simplifies the board assembly for you. 

    Please let me know if you have any additional questions. If this answered all your questions, please let me know by pressing the green button. 

    Best

    Dimitri