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5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses
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The STEVAL-IFP021V1 demonstration board is based on the STEF05 and STEF12 electronic fuses (E-Fuses).

It is designed to help users evaluate the benefit of the complete protection offered by the E-Fuse family and to customize their own application.

The E-Fuse family of hot-swap converters is designed to replace the mechanical fuses on low voltage power lines.

The STEF05 and STEF12 are integrated electronic fuses optimized for monitoring output current and input voltage.

Connected in series to the 5 V/12 V rails, they are capable of protecting the electronic circuitry on the output from overcurrent and overvoltage.

The turn-on time is programmable by means of an external capacitor, allowing control of the inrush current at startup and during hot-swaps.

When an overload condition occurs, the E-Fuse 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.

Both devices are equipped with a thermal protection circuit.

The intervention of the thermal protection is signaled to the board monitoring circuits through a signal on the enable/fault pin that can be connected to other parts belonging to the same family to cause a simultaneous shutdown during failure events.

Unlike mechanical fuses, which must be physically replaced after a single event, E-Fuses do not degrade in their performance after short-circuit/thermal protection interventions and can be reset either by re-cycling the supply voltage or by using the enable pin.

pdf データシート
Data Brief

Key Features

  • Input voltages: 5 V and 12 V
  • Continuous current: 3.6 A (typ.) each
  • Adjustable slew rate for output voltage
  • Overvoltage clamp
  • Undervoltage lockout
  • Programmable short-circuit current limit
  • Overload current limit
  • Controlled output voltage ramp
  • Thermal latch protection
  • Fault condition flag
  • Enable pin
  • RoHS compliant




Technical Documentation

Product Specifications

Description Version Size
DB1521: 5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses
1.0 165 KB

Application Notes

Description Version Size
AN4069: 5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses
1.1 807 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-IFP021V1 gerber files
3.1 112 KB

Bill of Materials

Description Version Size
2.1 40 KB

Schematic Pack

Description Version Size
STEVAL-IFP021V1 schematics
1.0 24 KB

サンプル& 購入

製品型名 Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-IFP021V1ActiveSTEF05; STEF12Buy Direct46.55Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

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(**)弊社ホームページで入手できるMaterial Declaration(材料宣誓書)のフォームは、各パッケージ・タイプで最も一般的に使用されるパッケージに基づいた包括的な文書です。そのため、特定のデバイスについて100%正確ではない可能性があります。特定のデバイスに関する情報については、 弊社セールスオフィス にお問合せ下さい。
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