描述 Description

The STEF512GR is an integrated dual electronic fuse, designed to protect circuitry on its output from overcurrent and overvoltage events, in those applications requiring hot swap operation and in-rush current control.

The device embeds two independent electronic fuses, one for the 5 V rails and one for the 12 V rails. Thanks to the very low ON-resistance of the integrated Power FETs, the voltage drop from the main supply to the load is very low during normal operations.

The start-up time can be adjusted by the user for each eFuse, via two small soft-start capacitors, connected to the relevant pins.

In this manner, the inrush current at startup can be kept under control.

The maximum load current is precisely limited, by utilizing a sense FET topology, to factory-defined values.

The device also provides a precise overvoltage clamp for each channel, preventing the load from being damaged by power supply failures, and undervoltage lockout (UVLO), assuring that the input voltage is above the minimum operating threshold, before the power device is turned on.

When an overload condition occurs, the STEF512GR limits the output current to the predefined safe value. If the anomalous overload condition persists, the device goes into thermal shutdown, the internal switch is opened and the load disconnected from the power supply.

特性 Features

? 5 V and 12 V channels into one chip
? 25 V absolute maximum input voltage
? Precise output over voltage clamp
? Fixed current limit: 3 A on 5 V, 4 A on 12 V
? Latched-off thermal protection
? Input undervoltage lockout
? Adjustable output voltage slew-rate for each channel
? Integrated 40 m? Power FETs
? SAS disable pin
? TSOT23-8L package

簡介

STEF512GR屬于集成電路（IC）的電流調(diào)節(jié)/管理。由制造生產(chǎn)的STEF512GR電流調(diào)節(jié)/管理電流調(diào)節(jié)和管理 IC 是用于監(jiān)視和調(diào)節(jié)電路電流的半導(dǎo)體器件。功能包括電流表、限流、電流鏡、電流監(jiān)控器、電流調(diào)節(jié)器、電流紋波抑制器、電流檢測、電流源、電流開關(guān)和電子保險絲，電流輸出從 100 μA 至 50 A 可調(diào)。