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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 eFuse market is expected to continue its growth trajectory in the coming years, fueled by the increasing integration of electronic systems across industries, technological advancements, and the need for reliable overcurrent protection solutions. With the global push towards electric mobility, the demand for eFuses in EVs and their charging infrastructure is expected to increase significantly.
eFuses play a crucial role in ensuring the safety and reliability of EV battery management systems and power electronics. Continuous advancements in semiconductor technology are leading to the development of more efficient and integrated eFuse solutions. Manufacturers are focusing on improving features such as accuracy, response time, and fault tolerance to meet the evolving requirements of modern electronic systems.
The trend towards miniaturization and integration of electronic components is driving the demand for compact and space-saving eFuse solutions. Integrated eFuses offer benefits such as reduced board space, simplified design, and lower overall system cost, driving their adoption across various applications
The Global eFuse Market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
onsemi NIS5x2x eFuses: onsemi NIS5x2x eFuses enhance the reliability of a hard drive or other circuit from both catastrophic and shutdown failures. The NIS5x2x eFuses are designed to buffer the load device from excessive input voltage which can damage sensitive circuits. The eFuse includes an overvoltage clamp circuit that limits the output voltage during transients. This does not shut the unit down allowing the load circuit to continue its operation. The NIS5x2x eFuses allow paralleling of eFuses as well as synchronizing turning on and off.
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.
Programmable Silicon Based e-Fuse for Diverse and Demanding Applications: – Littelfuse has released a range of single-chip, e-Fuse Protection IC for 5v – 28V applications. The e-Fuse provides faster response time, highly accurate current limiting, and more integrated protection, control, and sensing features than traditional fuses and PTCs, therefore, it can enhance the safety of the system while reducing the cost and size of the device. The e-fuse can reduce the design-in phase, printed circuit board (PCB) space requirements, BOM cost, and time-to-market compared to typical discrete solutions.
SiC E-Fuse Board for Electric Vehicles:– In order to provide BEV and hybrid-vehicle designers with a quicker and more dependable high-voltage circuit-protection solution, Microchip Technology unveiled the E-Fuse demonstrator board, powered by silicon carbide (SiC) technology, which is available in six variants for 400- to 800-V battery systems and has a current rating of up to 30 A. This technology demonstration makes use of Microchip’s 700V and 1200V Silicon Carbide (SiC) technology as well as other technologies.
Current Monitoring in Integrated eFuse Devices: Integrated eFuse devices now frequently have current monitoring features built-in. These cutting-edge eFuse options can precisely gauge and keep track of the circuit’s current in real time.
As a result, any unusual current spike or continuous high current may be quickly identified and dealt with, enabling precise control and protection. The addition of current monitoring to eFuse technology increases system reliability and offers better overall protection. Modern eFuse devices also come with a number of additional features and improvements that improve their use and functionality, including:
Fast Response Time: Recent eFuse technology developments have produced gadgets with incredibly quick response rates. They reduce the chance of component damage and system failures by being able to detect and respond to overcurrent circumstances in just a few microseconds.
Current Limit Adjustment: Some eFuse devices now provide user-programmable current limitations. The user can choose the appropriate current threshold at which the eFuse will trip and disrupt the circuit thanks to this versatility. Customization possibilities are available with the adjustable current limit function to satisfy certain application needs.
Overvoltage and Overtemperature Protection: Advanced eFuse devices may additionally include overvoltage and overtemperature protection in addition to overcurrent prevention. This guarantees thorough defense against a variety of potential threats, protecting the circuit and linked components from high voltage or temperature conditions.
Diagnostic and fault reporting functionalities are frequently included in contemporary eFuse devices. These capabilities can help with fault analysis and troubleshooting by offering useful information about the precise fault state that caused the eFuse to trip. The effectiveness of system maintenance and troubleshooting procedures depends on diagnostic capabilities.
System Control and Monitoring Integration: eFuse devices can be included into more extensive system control and monitoring designs. In order to enable centralized control and monitoring of numerous eFuse channels, they can connect with microcontrollers or system-on-chip (SoC) devices. This connection enables improved system-level management and protection.
Miniaturization and Integration:
Advanced Packaging Technologies:
AI and Machine Learning Integration:
