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active-semi® is providing a Family of eFuse products with active power loss protection and autonomous storage capacitor health monitoring. During a write cycles in SSDs it is important to detect an eminent power loss and actively signal this to the controller and allow a completion of data storage to not loose vital information. To ensure that the provided storage capacitors are capable of providing this function the ACT49xx products periodically conduct capacitor health screening.

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Parameter Operating Input Range eFuse Abs Max Voltage eFuse FET Rds(on) Storage Cap Voltage Maximum Input Current Buck FET RDS(on) (HS & LS) Autonomous Health Monitoring Package
ACT4910 2.7V ~ 18V 24V 17mΩ 5V ~ 36V 10A 45 mΩ & 28 mΩ Yes 5X5 mm QFN28
ACT4911 2.7V ~ 8V 10V 17mΩ 5V ~ 36V 10A 45 mΩ & 28 mΩ Yes 5X5 mm QFN28
ACT4921 2.7V ~ 8V 10V 20mΩ 5V ~ 36V 6A 46 mΩ & 32 mΩ Yes 4x4 mm QFN32