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Electronic fuses, or eFuses, are integrated circuits that can replace bigger traditional fuses or other protective devices like resettable polymeric fuses. They include a control circuit and a power switch with low on-resistance, connecting the input port to the load, and are housed in compact plastic packages such as DFN and Flip-chip.
When connected in series to the main power rail, an eFuse functions similarly to a regular fuse, detecting and reacting fast to overcurrent and overvoltage events. eFuses are often used to safeguard power supply line circuits. Servers, game consoles, PCs, and other technological devices are examples.
eFuses are commonly used in routers, telecom switches, hard disc drives and business storage, and server systems.Overcurrent or inrush current and voltage, short circuits, and reverse current are all protected by these fuses.
Furthermore, eFuses can self-repair without the need for human involvement. These fuses include integrated power switches and control circuits that detect overvoltage and overcurrent and react quickly to mitigate their effects.
The GLOBAL E FUSE MARKET accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2026, registering a CAGR of XX% from 2022 to 2027.
Alpha & Omega Semiconductor has introduced its first eFuse device for server sub-power rails.
The AOZ18101DI is a 5A eFuse in a 3mm x 3mm DFN package that combines a protection IC and a trench MOSFET with a large safe working region (SOA). When the eFuse is turned off, the device consists of two low RDS(ON) (20mohm) back-to-back MOSFETs that isolate the load from the input bus. It runs from 3.5 to 14V.
Because server products must be very reliable, all important power rails are monitored and protected by an eFuse device to prevent the main power bus from being interrupted owing to aberrant load during fault situations. The current flowing through the power switch is continually monitored by the eFuse.
If the current exceeds the specified limit, the switch will reduce the current to the maximum allowable. If the high current demand continues, the switch will finally shut down, safeguarding downstream loads and functioning as a fuse.
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