• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 23 subscribers
  • Views 522 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.

UCC2805-Q1- pin max rating

WS Lee
Intellectual 1935 points
Other Parts Discussed in Thread: UCC2805-Q1

Hi team,

Could you please answers for the following question related to UCC2805-Q1 max rating?

1. Absolute max rating voltage of VCCis 12V in datasheet. And 13.5V is clampped in the block diagram. So could you please clarify which voltage is absolute max voltage over all temp condition?

2. If the Vcc voltage maintains 18V during 100msec, what happens? Is it damaged or not?

3. What voltage are absolute max voltage for other pins(COMP, REF, OUT, RT pins)? There are only CS and FB in the datasheet.

Thanks,

WS

  • 0
    TI__Genius 16320 points
    Hi WS,

    The absolute max is 12V, this means damage could occur above 12V. The clamp might be there to limit the risk of damage for very short transients, but per the absolute max ratings any voltage above 12V has risk of damaging the device. If you maintain 18V for 100ms, the device might be damaged, so I can't recommend doing this.

    Regarding other pins, REF, and OUT pins are outputs and should not be driven externally. Applying any external voltage to them could damage it. COMP and RT pins should be 6.3V or VCC+0.3V, whichever is smaller.

    Regards,
    Karl