The STEF12 is an integrated electronic fuse optimized for monitoring output current and input voltage. Connected in series to a 12 V rail, it is capable of protecting the electronic circuitry on its output from overcurrent and overvoltage. The device has a controlled delay and turn-on time. When an overload condition occurs, the STEF12 limits the output current to a predefined safe value. If the anomalous overload condition persists it goes into an open state, disconnecting the load from the power supply. If a continuous short-circuit is present on the board, when power is re-applied the E-fuse initially limits the output current to a safe value and then again goes into an open state. The device is equipped with a thermal protection circuit. The intervention of the thermal protection is signalled to the board monitoring circuits through a signal on the Fault pin. Unlike the mechanical fuses, which must be physically replaced after a single event, the E-fuse does not degrade in its performance after short-circuit/thermal protection interventions and it is reset either by recycling the supply voltage or using the Enable pin. The companion chip for the 5 V power rails is also available with part number STEF05.
|DS7315: Electronic fuse for 12 V line||6.0||1 MB|
|AN4069: 5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses||1.1||807 KB|
|Linear and Switching Voltage Regulators Selection Guide||3.0||370 KB|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|STEF12PUR||DFN10 3X3||Tape And Reel||Active : Product is in volume production||0.596||1000||NEC||EAR99||CHINA||MORE INFO||Get Sample Add to cart||DISTRIBUTOR AVAILABILITY|
|STEF12EPUR||DFN10 3X3||Tape And Reel||Active : Product is in volume production||0.596||1000||NEC||EAR99||CHINA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
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