描述 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.

特性 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 m? 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 J