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Overcurrent Protection for 48V Power Supply-LTC4381ADKE-2 Electronic Fuse

Overcurrent Protection for 48V Power Supply-LTC4381ADKE-2 Electronic Fuse

Source:our siteTime:2024-10-22Views:

The LTC4381 provides overvoltage protection by clamping the gate voltage of an internal 9mΩ N-channel MOSFET to limit the output voltage to a safe value during an overvoltage event, such as a sudden drop in an automotive load.

Description:

The LTC4381ADKE-2 is an integrated solution for low-static current eFuse with an internal 9mΩN channel MOSFET. Overvoltage protection is provided by clamping the gate voltage of the internal 9mΩ N channel MOSFETs to limit the output voltage to a safe value during an overvoltage event, such as an automotive load drop. The MOSFET safe working area is production-tested to ensure it can withstand high voltage transient stresses. Fixed output clamp voltages for 12V and 24V/28V systems can be selected. For any system with a voltage up to 80V, an adjustable clamp version is used.


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Main features:

Withstand surge voltages up to 100V

Internal 9mΩ N channel MOSFETs

The safe operating area is 20ms for 70V or 1A

Low static current: 6μA working current

Run through the cold start of the car

Wide operating voltage range: 4V to 72V

No need to enter TVS

Overcurrent protection

Optional internal 28.5V/47V or adjustable output clamp voltage

Reverse input protection up to -60 V

The enable threshold is adjustable

Adjustable fault timer with MOSFET stress acceleration

Latch and retry options

Has a low retry duty cycle during a failure

32 pin DFN (7mm x 5mm) package


Applications:

Automotive 12V, 24V and 48V systems

Avionics/Industrial surge protection

Hot swap/live plug

High-end switch for battery powered systems

Automobile load drop protection


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