• [ CXUS7746 ]

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目录

1.产品概述       2.产品特点     UgD嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）UgD嘉泰姆

5.产品封装       6.电路原理图  UgD嘉泰姆

7.相关产品UgD嘉泰姆

   产品概述 返回TOPUgD嘉泰姆

     CXUS7746A是一种单信道的电源开关芯片，内部集成了一个75mΩ 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OCB。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，CXUS7746A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。OCB是开漏端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状态。芯片内置了8ms的延时功能以防止OCB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，CXUS7746A内置了反向电流保护功能防止关断时出现反向电流。CXUS7746A封装采用SOT23-5封装，工作温度范围是(-40℃to +85℃)。The CXUS7746A is an incorporated 75mΩ 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 CXUS7746A eliminates any reversed current flow across the switch when it is powered off. The CXUS7746A is available in SOT23-5 package, operates over the extended (-40°C to +85°C) temperature range.

   产品特点 返回TOPUgD嘉泰姆

• 75mΩ 导通电阻UgD嘉泰姆

• 工作电压: 2.7V to 5.5VUgD嘉泰姆

• 欠压保护功能UgD嘉泰姆

• 11μA 静态电流UgD嘉泰姆

• 1μA 关断电流UgD嘉泰姆

• CXUS7746A高电平使能UgD嘉泰姆

• 关断后无反向电流UgD嘉泰姆

• 带延时的开漏端过流指示信号(OCB)UgD嘉泰姆

• 输出关断泄放支路UgD嘉泰姆

• SOT23-5封装UgD嘉泰姆

• RoHS 适用和100% 无铅无鲁UgD嘉泰姆

100m
POWER MOSFETUgD嘉泰姆

Operating Range : 2.7V to 5.5VUgD嘉泰姆

Under Voltage LockoutUgD嘉泰姆

11μA Quiescent CurrentUgD嘉泰姆

1μA Shutdown CurrentUgD嘉泰姆

Logic Level Enable Pin, Available withUgD嘉泰姆

Active-Low or Active-High VersionUgD嘉泰姆

No Reverse Current when Power OffUgD嘉泰姆

Fault Blanking Open-Drain Over-Current FlagUgD嘉泰姆

Output (OC)UgD嘉泰姆

Output Shutdown Pull-low ResistorUgD嘉泰姆

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

(EP) PackagesUgD嘉泰姆

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

Halogen-FreeUgD嘉泰姆

UL Listed-File No. E334299UgD嘉泰姆

   应用范围 返回TOPUgD嘉泰姆

•USB 埠和自供电集线器UgD嘉泰姆

•USB 总线供电集线器UgD嘉泰姆

•热插拔电源系统UgD嘉泰姆

•常规high side开关应用UgD嘉泰姆

USB Ports and Self-Powered HubsUgD嘉泰姆

USB Bus-Powered HubsUgD嘉泰姆

Hot Plug-In Power SuppliesUgD嘉泰姆

General Purpose High Side Switch ApplicationsUgD嘉泰姆

   技术规格书（产品PDF) 返回TOP UgD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！UgD嘉泰姆

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产品封装图 返回TOPUgD嘉泰姆

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电路原理图 返回TOPUgD嘉泰姆

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◀ 上一篇:单通道的USB电源开关CXUS7745内部集成一个100mΩ的P型MOSFET功率管USB电源系统当输出负载过重短路时芯片会进入限流保护模式会拉低限流指示信号OC

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下一篇▶:CXUS7747带智能识别功能的USB Type-C DFP CC控制器芯片支持Type-C V1.1端口协议的连接检测正反插识别广播DFP设备电流能力配置适配器DFP检测到有UFP插入才开启VBUS供电拔出后自动关闭VBUS

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