• [ CXUS7745 ]

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目录

1.产品概述       2.产品特点     cwa嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）cwa嘉泰姆

5.产品封装       6.电路原理图  cwa嘉泰姆

7.相关产品cwa嘉泰姆

   产品概述 返回TOPcwa嘉泰姆

        CXUS7745/A是一种单信道的电源开关芯片，内部集成了一个100mΩ 的P型MOSFET功率管，该芯片主要应用于USB电源系统。当输出负载过重或者短路时，芯片会进入限流保护模式，此时会拉低限流指示信号OC。如负载持续超载或短路，芯片内部温度会迅速上升，进入过温保护模式，芯片会切断功率管以防止芯片损毁。 此外，CXUS7745/A内置了电源欠压保护功能，即当电源电压过低时，芯片也会切断功率管。直至电源电压恢复至正常范围后，才恢复正常工作。OC是开漏输出的限流标识引脚，用于标识芯片是否处于过流或者过温保护模式。芯片内置了8ms的延时功能以防止OC误动作，向主机提供错误的指示信号，例如输出接大电容负载时会出现短时限流。此外，CXUS7745A内置了反向电流保护功能防止关断时出现反向电流。CXUS7745/A封装采用SOT23-5 或者 8-pin MSOP及8-pin MSOP(EP)封装，工作温度范围是(-40℃to +85℃)。The CXUS7745/A is an incorporated 100mΩ P-channel MOSFET power-distribution switch for self-powered and bus-powered Universal Serial Bus (USB) applications. When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to safe level by switching into a constant-current limit mode with fold back, pulling the over-current ( OC) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shutdown the switch to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switch remains off until valid input voltage is present. OC is open-drain output which is asserted when over-current or over-temperature event occurs. A 8ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The CXUS7745/A eliminates any reversed current flow across the switch when it is powered off. The CXUS7745/A are available in SOT23-5, 8-pin MSOP and 8-pin MSOP(EP) packages, operates over the extended (-40°C to +85°C) temperature range.

   产品特点 返回TOPcwa嘉泰姆

• 100mΩ 导通电阻cwa嘉泰姆

• 工作电压: 2.7V to 5.5Vcwa嘉泰姆

• 欠压保护功能cwa嘉泰姆

• 11μA 静态电流cwa嘉泰姆

• 1μA 关断电流cwa嘉泰姆

• CXUS7745系列低电平使能cwa嘉泰姆

CXUS7745A系列高电平使能cwa嘉泰姆

• 关断后无反向电流cwa嘉泰姆

• 带延时的开漏端过流指示信号(OC)cwa嘉泰姆

• 输出关断泄放支路cwa嘉泰姆

• SOT23-5、MSOP-8、MSOP-8 (EP)封装cwa嘉泰姆

• RoHS 适用和100% 无铅无鲁cwa嘉泰姆

• UL认证号：E334299cwa嘉泰姆

100m
POWER MOSFETcwa嘉泰姆

Operating Range : 2.7V to 5.5Vcwa嘉泰姆

Under Voltage Lockoutcwa嘉泰姆

11μA Quiescent Currentcwa嘉泰姆

1μA Shutdown Currentcwa嘉泰姆

Logic Level Enable Pin, Available withcwa嘉泰姆

Active-Low or Active-High Versioncwa嘉泰姆

No Reverse Current when Power Offcwa嘉泰姆

Fault Blanking Open-Drain Over-Current Flagcwa嘉泰姆

Output (OC)cwa嘉泰姆

Output Shutdown Pull-low Resistorcwa嘉泰姆

Available in SOT23-5,MSOP-8 and MSOP-8cwa嘉泰姆

(EP) Packagescwa嘉泰姆

RoHS Compliant and 100% Lead(Pb)-Freecwa嘉泰姆

Halogen-Freecwa嘉泰姆

UL Listed-File No. E334299cwa嘉泰姆

   应用范围 返回TOPcwa嘉泰姆

•USB 埠和自供电集线器cwa嘉泰姆

•USB 总线供电集线器cwa嘉泰姆

•热插拔电源系统cwa嘉泰姆

•常规high side开关应用cwa嘉泰姆

USB Ports and Self-Powered Hubscwa嘉泰姆

USB Bus-Powered Hubscwa嘉泰姆

Hot Plug-In Power Suppliescwa嘉泰姆

General Purpose High Side Switch Applicationscwa嘉泰姆

   技术规格书（产品PDF) 返回TOP cwa嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！cwa嘉泰姆

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产品封装图 返回TOPcwa嘉泰姆

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电路原理图 返回TOPcwa嘉泰姆

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相关芯片选择指南 返回TOP           更多同类产品。。。。。                 

◀ 上一篇:CXUS7744双通道的电源开关芯片两个95mΩ的P型MOSFET功率管每个通道各有一个逻辑使能控制信号限流电流设置在1A有fold back功能检测到过温状况自动进入保护切断功率通道防止芯片损毁

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下一篇▶:CXUS7746 OCB开漏端输出限流标识引脚过流过温保护状态芯片内置8ms延时功能以防止OCB误动作向主机提供错误的指示信号输出接大电容负载时会出现短时限流

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