STEF512GR数据手册集成电路（IC）的电流调节/管理规格书PDF

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 mΩ Power FETs
• SAS disable pin
• TSOT23-8L package

简介

STEF512GR属于集成电路（IC）的电流调节/管理。由制造生产的STEF512GR电流调节/管理电流调节和管理 IC 是用于监视和调节电路电流的半导体器件。功能包括电流表、限流、电流镜、电流监控器、电流调节器、电流纹波抑制器、电流检测、电流源、电流开关和电子保险丝，电流输出从 100 μA 至 50 A 可调。