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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.
TPS2553DRVRTPS2553DRVRTPS2553DRVRTPS2553DRVRTPS2553DRVR
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。
Texas Instruments
电源开关 IC - 配电
High Side
1 Output
1.5 A
1.2 A
100 mOhms
2.5 V to 6.5 V
- 40 C
+ 85 C
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