App note: Hot plug insertion startup time delay for eFuse

Posted on Sunday, March 4th, 2018 in app notes by DP


App note from ON semiconductors about time delay on start up in conjunction with eFuse to compensate voltage spikes that can falsely trigger them. Link here (PDF)

The eFuse protection devices are used for limiting the system load current in the event of an overload or a short circuit. Many applications employ ON Semiconductor eFuses at the power input stage of the system between the main power input connector and DC−DC converters or power regulators. Such applications often tend to experience a voltage spikes and transients during a hot-plug events, especially when the long cables are used at the power input.

Although ON Semiconductor eFuses are extremely immune to voltage transients and eFuses with the Overvoltage clamp feature provide a fast response when limiting the output voltage during transients, sometimes various applications require a time delay between the hot-plug input voltage application and enabling of the eFuse in order for the input voltage to be stabilized before turning on the eFuse.

This entry was posted on Sunday, March 4th, 2018 at 1:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Stephen Tinius: Thank you.
  • KH: Ah, the site sells boards, that's the reason. At least it's a XC6SL9 board that does not cost an arm and a leg, though it...
  • Max: While I understand this is more educational than practical in nature, I prefer my edutainment a lot more firmly grounded in economic reality. Sure, you...
  • KH: Using an alkaline coin cell down to 1.0V or under is a very bad idea anyway, unless you as the designer or manufacturer don't care...
  • KH: Farnell says TS1001 is no longer stocked. Not on RS. Digikey says it's obsolete. That said, there are a lot of nanoamp-class parts on sale...