STEF48H28

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30 A electronic fuse for the 9-80 V DC rails

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Product overview

Description

The STEF48H28 is an advanced 30 A integrated electronic fuse for the 9 - 80 V DC power lines.

Connected in series to the main power rail, it provides protections from inrush, under/overvoltage, and overcurrent conditions. When an overload condition occurs, the device reacts with a (I x t) approach with adaptive time to shut down. The overcurrent protection curve can be customized to accommodate for pulsed overloads, typical of CPUs/GPUs. If the overload persists, the device disconnects the load from the bus.

A precise current monitor signal provides continuous information about the load current to the system controller IC. Similarly, a precise temperature sensor generates a monitor signal that permits the system controller to keep the device's power dissipation under control.

Adjustable insertion delay and soft-start time help control the in-rush current during startup operations.

The device also embeds user-adjustable undervoltage/overvoltage lockout protection, power good, self-diagnostic, and thermal protection.

Telemetry and status information is available both in analog form and on the digital PMBUS® interface.

Multiple STEF48H28 can be connected in parallel to support high-power systems, such as AI servers and supercomputers.

  • All features

    • 30 A continuous current
    • Input voltage range from 9 to 80 V
    • Absolute maximum rating 95 V
    • SMBUS™ interface
    • PMBUS®™ V 1.3.1 commands compliant
    • Adjustable UVLO and OVLO
    • Integrated 1.7 mΩ power MOSFET
    • Overcurrent protection with adjustable threshold and timeout
    • Fast, adjustable short-circuit protection
    • Thermal protection
    • Power good, fault, and reset functions
    • Programmable soft-start and turn-on delay time
    • Precise current monitor signal
    • Precise temperature monitor
    • Digital voltage, current, power, energy, and temperature telemetry
    • Parallel operation
    • Integrated MOSFET diagnostic features
    • Integrated black-box function
    • Fault latch or auto-retry configuration
    • -40 °C < TJ < 125 °C operating temperature
    • QFN42L (7x7 mm) package - IPC2221B 100 V spacing compatible

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STMicroelectronics - STEF48H28

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF48H28
Preview
PWFQFN 7X7X1.2 48L PITCH 0.5 Industrial Ecopack2
STEF48H28SL
Preview
PWFQFN 7X7X1.2 48L PITCH 0.5 Industrial Ecopack2

STEF48H28

Package:

PWFQFN 7X7X1.2 48L PITCH 0.5

Material Declaration**:

Marketing Status

Preview

Package

PWFQFN 7X7X1.2 48L PITCH 0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF48H28SL

Package:

PWFQFN 7X7X1.2 48L PITCH 0.5

Material Declaration**:

Marketing Status

Preview

Package

PWFQFN 7X7X1.2 48L PITCH 0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors