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SN6501: Safty when IC is short

Kaverappa CB
Prodigy 20 points
Part Number: SN6501

Hi,

I was performing single point failure test for this ic (i.e i had short adjacent pins of the ic and checking the behavior of it).

I observed following results,

1. when pin no. 1&2 or pin no 2&3 is shorted, this ic is limiting the current, when the short is removed it resumes to its normal function.

2. When VCC(pin 2) is shorted to GND as shown in below figure (the IC is limiting the current)

I want to know whether the ic is taking any safety precautions by opening the switches, as per datasheet It BBM logic that is only for dead time right, is it related to any safe state of IC.

Thank you.

Regards,

Kaverappa CB 

  • 0
    TI__Mastermind 49445 points

    Hi Kaverappa,

    The device SN6501 doesn't have any inbuilt current limiting function. The device doesn't do any current limiting but following happen when do the pin short testing.

    1. Shorting pins 1 & 2 or pins 2 & 3 will make the device turn off intermittently. This happens every time the internal transistor at pins D1 or D2 are turned on. Thus you will see the actual output current being much lower than what the solution is designed for.
    2. When VCC is shorted to GND, the device technically gets turned off and hence there won't be any switching. I believe under this condition, you may not see any output voltage. Since VCC is shorted to GND, the power supply that supplying VCC is also being short may source considerable amount of current into itself.

    I hope this answers your questions, thanks.

    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    Prodigy 20 points

    Hi Koteshwar,

            Thank you for your response.

    Regards,

    Kaverappa CB