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ON Semiconductor introduces a self-protected electronic fuse for inrush current limiting

Vélizy, France : ON Semiconductor has announced the NIS5112 , a new member of its SMART HotPlug™ family. The integrated self-protected, resettable, electronic fuse utilizes a high side N-channel FET, driven by an internal charge pump. Designed for use in 12 V systems, the device provides a cost-effective inrush current limiting solution for hot swap applications such as Enterprise class hard drives. Designed to allow the safe insertion and removal of equipment into 12 V backplanes, the NIS5112 utilizes an internal SENSEFET™ that enables active current limiting via inexpensive chip resistors instead of more expensive, low impedance current shunts. Coupled with an adjustable voltage slew rate, it allows the designer the versatility to easily select the level at which current is limited and the rate the output voltage comes up for multiple applications. The NIS5112 has an input voltage range of 9 V to 18 V and also provides overvoltage protection intended to allow operation through transients while protecting the load. The device also contains circuits to control the turn-on voltage, output current, die temperature, turn-on di/dt and turn-on dV/dt, as well as an enable/timer function. It offers robust thermal protection circuit in two different thermal limit versions, auto-retry and latch off. ON Semiconductor , Vélizy, France.

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