TPS2556DRBR/TI，

PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

精密可调目前有限配电开关

FEATURES APPLICATIONS
2• Meets USB Current-Limiting Requirements • USB Ports/Hubs
• Adjustable Current Limit, 500 mA–5 A (typ) • Digital TV
• +/- 6.5% Current-Limit Accuracy at 4.5 A • Set-Top Boxes
• Fast Overcurrent Response - 3.5-μS (typ) • VOIP Phones
• 22-mΩ High-Side MOSFET
DESCRIPTION • Operating Range: 2.5 V to 6.5 V
The TPS2556/57 power-distribution switches are
• 2-μA Maximum Standby Supply Current intended for applications where precision current
• Built-in Soft-Start limiting is required or heavy capacitive loads and
• 15 kV / 8 kV System-Level ESD Capable short circuits are encountered. These devices offer a
programmable current-limit threshold between 500
• UL Listed* – File No. E169910 mA and 5.0 A (typ) via an external resistor. The
• CB & Nemko Certification* power-switch rise and fall times are controlled to
• *R minimize current surges during turn on/off. ILIM ≥ 24.9 kΩ (5A maximum)
TPS2556/57 devices limit the output current to a safe
level by switching into a constant-current mode when
the output load exceeds the current-limit threshold.
The FAULT logic output asserts low during
overcurrent and over temperature conditions.
功能应用程序
2•满足USB限流要求•USB端口/中心
•可调电流限制,500 mA-5(typ)•数字电视
•限流精度+ / - 6.5% 4.5•机顶盒
•快速过电流响应- 3.5 -μs(typ)•VOIP电话
•22-mΩ高端MOSFET
•描述操作范围:2.5 V至6.5 V
的TPS2556/57配电开关
•2-μA最大备用电源电流用于应用程序精密电流
•内置软启动限制是必需的或沉重的电容性负载和
•15千伏/ 8千伏系统级防静电能力短路。这些设备提供一个
可编程的限流阈值在500年
•UL *——文件没有列出。E169910马和5.0(typ)通过一个外部电阻。的
•CB与Nemko认证*提示上升和下降时间控制
•* R最小化当前打开/关闭期间激增。ILIM≥24.9 kΩ(最多5个)
TPS2556/57设备安全限制输出电流
当水平切换到恒流模式
输出负载超过了限流阈值。
输出的故障逻辑断言在较低
过电流和温度条件。