Overview
The STEF01FTR from STMicroelectronics is a universal integrated electronic fuse designed to monitor and protect DC power lines. It operates within an input voltage range of 8 to 48 V and can handle a continuous current of up to 4 A. This device is optimized for detecting and responding to overcurrent and overvoltage conditions, ensuring the safety and reliability of the connected load. The STEF01FTR is fully programmable, allowing users to set various parameters such as the undervoltage lockout (UVLO) threshold, output clamping voltage, and startup time. It also features thermal protection, short-circuit current limit, and adjustable soft-start time, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Input Voltage Range | 8 to 48 | V |
| Absolute Maximum Input Voltage | 55 | V |
| Continuous Current (Typ.) | 4 | A |
| N-channel On-resistance (Typ.) | 30 | mΩ |
| Output Clamping Voltage Range | 10 to 52 | V |
| UVLO Threshold Range | 8 to 45 | V |
| Maximum Junction Temperature | 150 | °C |
| Storage Temperature Range | -65 to 150 | °C |
| Thermal Shutdown Threshold | 175 | °C |
| Package Type | HTSSOP14 |
Key Features
- Fully programmable undervoltage lockout (UVLO) and output clamping voltage
- Adjustable soft-start time to control inrush current during startup and hot-swap operations
- Short-circuit current limit and programmable overload current limit
- Thermal protection with latched or auto-retry modes selectable via the Auto pin
- Maximum allowable power protection to prevent overheating
- Power Good signal for monitoring the device status
- Gate driver pin for external reverse current protection MOSFET
- Enable/Fault pin for device status monitoring and control
Applications
- Hot board insertion
- Electronic circuit breaker/power busing
- Industrial, alarm, and lighting systems
- Distributed power systems
- Telecom power modules
Q & A
- What is the operating input voltage range of the STEF01FTR?
The operating input voltage range is 8 to 48 V.
- What is the maximum continuous current the STEF01FTR can handle?
The maximum continuous current is 4 A.
- Can the STEF01FTR be programmed for different protection thresholds?
Yes, the STEF01FTR is fully programmable for UVLO, output clamping voltage, and other parameters.
- What types of thermal protection does the STEF01FTR offer?
The STEF01FTR offers thermal protection with latched or auto-retry modes.
- How does the STEF01FTR handle short-circuit conditions?
The device limits the output current to a safe value and can enter a foldback current limit mode during strong overloads or short circuits.
- What is the purpose of the Enable/Fault pin on the STEF01FTR?
The Enable/Fault pin serves to enable/disable the device and provide status information about the device to the application.
- Can the STEF01FTR be used for reverse current blocking?
Yes, it provides a gate driver pin to control an external N-channel FET for reverse current blocking.
- What is the package type of the STEF01FTR?
The package type is HTSSOP14.
- What are some common applications of the STEF01FTR?
Common applications include hot board insertion, electronic circuit breaker/power busing, industrial/alarm/lighting systems, distributed power systems, and telecom power modules.
- Is the STEF01FTR compliant with RoHS standards?
Yes, the STEF01FTR is RoHS-compliant.
