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UCC27611: OUTH and OUTL Output Capacitance + Source and Sink Limitations?

Filipe Rubinstein
Intellectual 821 points
Part Number: UCC27611

Hi all, 

I have several questions regarding the OUTH and OUTL pins of the UCC27611. Namely the following:

1. What is the output capacitance of OUTH and OUTL pins or the drivers for these devices?

2. What potential damage could occur to the device running OUTH and OUTL at their maximum current capabilities?  Is it possible to exceed the 4A source and 6A sink current limits of the device temporarily, and if so, for how long?

3. What will happen to the device if there is more current being to sinked to the device than the 6A limit? Will this cause damage to the chip or is there a shutdown/disconnection feature?

Regards,

Filipe Rubinstein

  • 0
    TI__Expert 6765 points

    Hi Filipe,

    1. We do not have data for the output capacitance of the output pins.

    2.  It's important to note that the 4A source and 6A sink currents are not actually the limit, but it's just the current parameters obtained when testing the chip at VDD = 12V. The higher the VDD voltage, the higher the source and sink currents will be, and vice versa.

    3. The source and sink currents are pulsed for an extremely short time, so as long as the absolute max ratings aren't hit (500 ns for current pulse and 20V for VDD), it should not damage the chip. You would need an extremely large capacitance to have the current pulse for that long.

    Thanks,

    Rubas