STEF48H28数据手册ST中文资料规格书

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 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 J