TI TPS2552精密电源分配方案

TI 公司的TPS2552/53和TPS2552-1/53-1是电源分配开关,主要用于需要精密限流或大容性负载与可能出现短路的地方.器件通过外接电阻可编程限流阈值在75mA和1.3A之间.限流精度在1.3A时为+/-6%.2us快速过流响应时间,高边MOSFET的导通电阻为85毫欧姆.内置了软起动,工作电压为2.5V到6.5V,待机电流小于1uA,可用于数字电视(DTV(,机顶盒(STB),手机和网络电话(VoIP).本文介绍了TPS2552/53和TPS2552-1/53-1的主要特性与优势, 功能方框图以及评估板的电路图和所用元件列表.

The TPS2552/53 and TPS2552-1/53-1 power-distribution switches are intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. These devices offer a programmable current-limit threshold between 75 mA and 1.3 A (typ) via 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 turn on/off.
..

查看全文