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STEF12PUR データシート(PDF) 1 Page - STMicroelectronics |
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STEF12PUR データシート(HTML) 1 Page - STMicroelectronics |
1 / 20 page December 2011 Doc ID 019056 Rev 3 1/20 20 STEF12 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 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. DFN10 (3 x 3 mm) Table 1. Device summary Order code Package Packaging STEF12PUR DFN10 (3 x 3 mm) Tape and reel www.st.com |
同様の部品番号 - STEF12PUR |
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