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TPS2554DRCT

描述: TPS2554 高电平有效的 0.5-2.5A 可调节、2 个可设置 ILIMIT、4.5-5.5V、73mΩ USB 电源开关
品牌名称: TI(德州仪器)
商品型号: TPS2554DRCT
商品编号: C2150163
商品封装: VSON-10-EP(3x3)
包装方式: 编带
商品毛重: 0.001克(g)

商品参数

商品概述

TPS2554/55 配电开关用于需要精密电流限制或遇到重电容负载和短路的应用。这些器件通过外部电阻提供介于 500mA 和 2.5 A（典型值）之间的可编程电流限制阈值。当输出负载超出电流限制阈值时，TPS2554/55 器件通过切换到恒定电流模式，将输出电流限制在安全的程度。此故障逻辑输出在过流和过温条件下判定为低。

The TPS2554/55 is a current-limited, power-distribution switch using an internal N-channel MOSFET as a switch for applications where short circuits or heavy-capacitive loads will be encountered. This device allows the user to program two independent current-limit thresholds between 500 mA and 2.5 A (typ) via two external resistors. The ILIM_SEL pin allows the user to select one current limit or the other. This device incorporates an internal charge pump and the gate-drive circuitry necessary to drive the N-channel MOSFET. The charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate of the MOSFET above the source. The driver controls the gate voltage of the power switch. The TPS2554/55 family limits the output current to the programmed current-limit threshold ILIM0 or lLIM1 during an overcurrent or short-circuit event by reducing the charge-pump voltage driving the N-channel MOSFET and operating it in the linear range of operation. This necessarily results in a reduction in the output voltage at OUT. Exposure to an overload condition leads directly to heat dissipation in the internal MOSFET. The MOSFET is protected thermally such that it will shut off when it gets too hot. The TPS2554/55 will automatically restart following cooling of the device.

商品特性

满足USB 电流限制要求
可调节电流限制，500mA 至2.5A （典型值）
两个可独立设置的电流限制阈值
快速过流响应 -1.5μs （典型值）
73mΩ 高侧MOSFET
3.8A 最大待机电源电流
PowerPAD热管理
禁用时自动输出放电
高电平启用(TPS2554) 和低电平启用(TPS2555)版本均可用

应用领域

USB 端口/集线器
数字电视
机顶盒
VOIP 电话

	属性	参数值
	商品目录	功率电子开关
	类型	高侧开关
	通道数	1
	输入控制逻辑	高电平有效

	属性	参数值
	工作电压	4.5V~5.5V
	导通电阻	73mΩ
	工作温度	-40℃~+125℃