Programming Ethernet Jack electric circuit board STEF12PUR Enable / Fault functions
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Detailed Product Description
Programming Ethernet Jack electric circuit board STEF12PUR Enable / Fault functions
STEF12PUR
Electronic fuse for 12 V line
Features ■ Continuous current (typ): 3.6 A ■ N-channel on-resistance (typ): 53 mΩ ■ Enable/Fault functions ■ Output clamp voltage (typ):15 V ■ Undervoltage lockout ■ Short-circuit limit ■ Overload current limit ■ Controlled output voltage ramp ■ Thermal latch (typ): 165 °C ■ Uses tiny capacitors ■ Operating junction temp. - 40 °C to 125 °C ■ Available in DFN10 (3 x 3 mm) package Applications ■ Hard disk drives ■ Solid state drives (SSD) ■ Hard disk and SSD arrays ■ Set-top boxes ■ DVD and Blu-Ray disc drivers Description 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 Efuse
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.
A part of stock list
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