STEF12S集成电路（IC）的电流调节/管理规格书PDF中文资料

STEF12S属于集成电路（IC）的电流调节/管理。由意法半导体集团制造生产的STEF12S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。

特性 Features

• 15 V typical output overvoltage clamp

• Absolute maximum voltage of 25 V

• Adjustable current limit

• Thermal protection

• Input undervoltage lockout

• Low inrush current during startup

• Integrated 40 mΩ Power FET

• En/fault pin

• Adjustable slew rate for output voltage

• Gate control pin for reverse current blocking FET (DFN10 package)

• TSOT23-8L and DFN10 (3x3 mm) packages

• Latch (STEF12S) or autoretry (STEF12SA) versions

Applications

• Hard Disk and SSD drives

• Hard disk array

• Hot-swap board

• Hot-plug protection

描述 Description

The STEF12S is an integrated electronic fuse optimized to monitor the 12 V DC

power lines.

When connected in series to the main power rail, it is able to precisely detect and

react to overcurrent and overvoltage conditions.

When an overload condition occurs, the device limits the output current to a safe

value defined by the user. If the anomalous overload condition persists, the device

goes into an open state, disconnecting the load from the power supply.

In case of overvoltage on the input, the device regulates the output to a preset safe

value.

Undervoltage lockout prevents the load from malfunction, keeping the device off if the

rail voltage is too low.

The STEF12S features the adjustable turn-on slew-rate, which is useful to keep the

in-rush current under control during startup and hot-swap operations.

On the DFN10 package a dedicated pin provides a gate control for an external

optional N-channel Power FET, used to implement the reverse current blocking in

case of input voltage loss.

The STEF05S is a companion chip for the 5 V rails, useful to implement a complete

power rail control in data-storage applications.