Technical note from Texas Instruments on their high power density eFuse used in hot swappable servers. Link here (PDF) As demand for data increases, so does demand for servers and data centers, and thus higher demand for power. Industry trends suggest that power per rack, which was 4 kW in 2020, will be as high […]
Tag Archives: eFuses
App note: The importance of compensation capacitors on the eFuse power line
Inductive spike on voltage rails causes eFuse to shutdown, here’s an app note from ON Semiconductors on how they solve this problem from happening. Link here (PDF) ON Semiconductor produces a wide variety of silicon based protection products including current limiting devices such as Electronic Fuses (eFuses). During an over−current stress, eFuses can limit the […]
App note: eFuse reverse voltage protection
App note from ON Semiconductors about eFuses’ ability to block reverse voltage. Link here (PDF) One area in which they (eFuses) differ in performance is reverse polarity protection. While a TVS device and polyfuse will protect against reverse voltages, the nature of an integrated semiconductor device does not inherently allow for this type of protection. […]
App note: Understanding eFuse input voltage transients from hot plug events
App note from ON Semiconductors about things to look for when hot plugging eFuses. Link here (PDF) System designers must account for voltage surges that occur when supplies or loads are connected. eFuses are integrated circuits with many features to protect loads from these surges. However, it is important to ensure that the eFuse itself […]
App note: How to determine if an eFuse system can be safely hot−plugged
This app note from ON Semiconductors linked here (PDF) System designers must account for voltage surges that occur when supplies or loads are connected. eFuses are integrated circuits with many features to protect loads from these surges. However, it is important to ensure that the eFuse itself will not receive excessive voltage on its input. […]
App note: Charging capacitive loads with eFuse
App note from ON Semiconductors on how eFuse manage to cope up with large capacitive loads. Link here (PDF) The eFuse protection devices are used for limiting the system load current in the events of overload or short circuit. Many applications employ On Semiconductor eFuses at the power input stage of the system between the […]
App note: Paralleling eFuses
ON Semiconductors guide to cover much higher current capacity from eFuses. Link here (PDF) The standard 12 V, 5 V and 3.3 V electronic fuses from ON Semiconductor provide overcurrent and overvoltage protection and come in different current limit configurations. As an example, the 5 V NIS5452 eFuse has a recommended operational 5 A current […]
App note: Enable pin operation and functions of eFuses
Get to know a number of useful usage of the enable pin of ON Semiconductor’s eFuse. Link here (PDF) ON Semiconductor electronic fuses (eFuses) are analog integrated circuits that are used to protect circuits operating from 3.3, 5, or 12 V DC supplies. They have numerous protection functionalities such as overvoltage clamping, current limiting, thermal […]
App note: eFuse load current measurement
App note from ON Semiconductor on eFuse current measurement. Link here (PDF) This application note describes the load current measurement solution for the eFuses which do not provide load current monitoring feature. Since almost all of the eFuses provide adjustable current limit functionality by utilizing an external current limiting resistor between “ILIM” and “SRC” pins, […]
App note: Hot plug insertion startup time delay for eFuse
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 […]
App note: Current limits in electronic fuses using direct and Kelvin R limit connections
App note from ON Semiconductor about eFuse or Electronic fuse. Link here (PDF) The primary function of an Electronic Fuse, or eFuse, is to limit current, the same function provided by any fuse or positive temperature coefficient device (PTC). An eFuse, however, provides this function with much more versatility than either of these devices. An […]
App note: Advantages of eFuses versus PTC resettable fuses
The advantage of eFuses an application note from ON Semiconductors. Link here (PDF) Overcurrent protection is a basic necessity for electrical devices. While many people are familiar with fuses and household circuit breakers, few are intimately familiar with the kinds of overcurrent protection devices that are found in electronics. Though not a comprehensive list, there […]