TPS2552DBVR电源开关 IC - 配电原装德州TI

1 Features

1• Up to 1.5-A Maximum Load Current

• ±6% Current-Limit Accuracy at 1.7 A (Typical)

• Meets USB Current-Limiting Requirements

• Backwards Compatible With TPS2550 and

TPS2551

• Adjustable Current Limit: 75 mA to 1700 mA

(Typical)

• Constant-Current (TPS255x) and Latch-Off

(TPS255x-1) Versions

• Fast Overcurrent Response - 2 μs (Typical)

• 85-mΩ High-Side MOSFET (DBV Package)

• Reverse Input-Output Voltage Protection

• Operating Range: 2.5 V to 6.5 V

• Built-In Soft Start

• 15-kV ESD Protection per IEC 61000-4-2 (With

External Capacitance)

• UL Listed – File No. E169910 and NEMKO

IEC60950-1-am1 ed2.0

• See the TI Switch Portfolio

2 Applications

• USB Ports and Hubs

• Digital TVs

• Set-Top Boxes

• VOIP Phones

3 Description

The TPS255x and TPS255x-1 power-distribution

switches are intended for applications where

precision current limiting is required or heavy

capacitive loads and short circuits are encountered

and provide up to 1.5 A of continuous load current.

These devices offer a programmable current-limit

threshold between 75 mA and 1.7 A (typical) through

an external resistor. Current-limit accuracy as tight as

±6% can be achieved at the higher current-limit

settings. The power-switch rise and fall times are

controlled to minimize current surges during turnon

and turnoff.

TPS255x-1 devices provide circuit breaker

functionality by latching off the power switch during

overcurrent or reverse-voltage situations. 
TPS2552DBVRTPS2552DBVRTPS2552DBVRTPS2552DBVR

1功能

最大负载电流1.5-A

•限流精度为1.7±6%(典型的)

满足USB电流限制要求

•向后兼容TPS2550和

TPS2551

•可调电流限制:75毫安至1700毫安

(典型的)

•恒流(TPS255x)和闭锁

(TPS255x-1)版本

•快速过电流响应- 2μs(典型的)

•85 - mΩ高端MOSFET(伏特分贝包)

•反向输入输出电压保护

•操作范围:2.5 V - 6.5 V

•内置软启动

•符合IEC 61000-4-2 (With)的15 kv ESD保护

外部电容)

•UL列出-文件编号。E169910,NEMKO

IEC60950-1-am1 ed2.0

•查看TI Switch投资组合

2应用程序

•USB端口和集线器

•数字电视

•机顶盒

•VOIP电话

3描述

TPS255x和TPS255x-1功率分布

开关适用于以下应用程序

精密限流或大电流要求

遇到容性负载和短路

提供1.5 A的连续负载电流。

这些装置提供可编程的电流限制

阈值在75 mA到1.7 A(典型)之间

一个外部电阻。电流限制精度与

±6%可以达到更高的限流

设置。电源开关的升降时间是

控制在turnon期间电流波动最小化

和让人倒胃口。

TPS255x-1设备提供断路器

功能通过闭锁电源开关期间

过流或反电压情况。