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5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses
  • active 活性

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.

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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


图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DB1521: 5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses
1.0 165 KB

Application Notes

描述 版本 大小
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

描述 版本 大小
STEVAL-IFP021V1 gerber files
3.1 112 KB

Bill of Materials

描述 版本 大小
2.1 40 KB

Schematic Pack

描述 版本 大小
STEVAL-IFP021V1 schematics
1.0 24 KB

样品 & 购买

产品型号 Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-IFP021V1ActiveSTEF05; STEF12Buy Direct46.55Distributor reported inventory date: 2016-02-13
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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