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首页 > Products > Battery Charging Chip > USB Interface Circuit > USB Switch > The CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input.
The CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input.

The CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. When either output load exceeds the current-limit threshold or a short is present, the device limits the outputs current to a safe level by switching into a constant-current limit mode with fold back, pulling the over-current (OCB(s)) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switches, causing the junction temperature to raise, a thermal protection circuit shutdown the switches to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switches remain off until valid input voltage is present. Each power switch is designed to set current limit at 1A typically. OCB(s) are open-drain outputs which are asserted when over-current 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 CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input.
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1.产品概述       2.产品特点     4SR嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)4SR嘉泰姆

5.产品封装       6.电路原理图  4SR嘉泰姆

7.相关产品4SR嘉泰姆

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     CXUS7744是一种双通道的电源开关芯片,内部集成了两个95mΩ 的P型MOSFET功率管,每个通道各有一个逻辑使能控制信号。当负载超出限制范围或者有短路情况发生的时候,芯片会进入限流模式,把负载电流控制在安全区域内,同时拉低限流指示信号OCB(s),CXUS7744的每个通道的限流电流设置典型值均在1A,并且具有fold back功能;如果持续存在超重负载或者短路情况,芯片内部温度和功耗将迅速上升,芯片将检测到过温状况,并自动进入保护状态,切断功率通道以防止芯片损毁;另外,CXUS7744还具有检测输入电源的功能,功率管会维持关断直到电源电压超过欠压阈值范围。OCB(s)是具有开漏输出的限流标记引脚,8ms的延时功能可以屏蔽错误的限流信号,防止芯片向主机系统发出错误的指示。例如大电容负载接入导致的短期限流情况的发生。CXUS7744可以在芯片关断的时候阻断反向电流的发生。CXUS7744封装采用8引脚的SOP封装,工作温度范围是(-40℃to +85℃)。The CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. When either output load exceeds the current-limit threshold or a short is present, the device limits the outputs current to a safe level by switching into a constant-current limit mode with fold back, pulling the over-current (OCB(s)) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switches, causing the junction temperature to raise, a thermal protection circuit shutdown the switches to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switches remain off until valid input voltage is present. Each power switch is designed to set current limit at 1A typically. OCB(s) are open-drain outputs which are asserted when over-current 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 CXUS7744 eliminates any reversed current flow across each switch when it is powered off. The ECXUS7744is available in 8-pin SOP package, operates over the extended (-40 to ℃ +85 ) temperature ℃ range.

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• 双通道95 mΩ High-Side MOSFET4SR嘉泰姆

• 1A限流电流,且具有fold-back功能4SR嘉泰姆

• 工作电压范围:2.7V to 5.5V4SR嘉泰姆

• 300μs 输出电压上升时间4SR嘉泰姆

• 欠压保护功能4SR嘉泰姆

• 15μA 静态电流4SR嘉泰姆

• 1μA 关断电流4SR嘉泰姆

• 低电平逻辑使能控制4SR嘉泰姆

• 芯片关断后没有反向电流4SR嘉泰姆

• 具有延时功能的开漏输出限流指示信号4SR嘉泰姆

• SOP-8,SOP-8(EP)封装4SR嘉泰姆

• 符合RoHS规范及Pb-Free4SR嘉泰姆

 Dual 95m High-Side MOSFET4SR嘉泰姆

 1A (CXUS7744) Current Limits with Fold-back4SR嘉泰姆

 1.5A (CXUS7744-15) Current Limits with4SR嘉泰姆

Fold-back4SR嘉泰姆

 Operating Range:2.7V to 5.5V4SR嘉泰姆

 300μS Typical Rise Time4SR嘉泰姆

 Under voltage Lockout4SR嘉泰姆

 15μA Quiescent Supply Current4SR嘉泰姆

 1μA Shutdown Supply Current4SR嘉泰姆

 Logic Level Enable Pin, Available with4SR嘉泰姆

Active-Low Version4SR嘉泰姆

 No Reverse Current when Power Off4SR嘉泰姆

 Open-Drain Over-Current Flag Outputs with4SR嘉泰姆

fault-blanking4SR嘉泰姆

 Available in SOP-8 and SOP-8 (EP) Packages4SR嘉泰姆

 RoHS Compliant and 100% Lead(Pb)-Free4SR嘉泰姆

Halogen-Free4SR嘉泰姆

   应用范围 返回TOP4SR嘉泰姆


• High-Side 电源开关4SR嘉泰姆

• USB 电源管理系统4SR嘉泰姆

• USB主机和自供电的总线系统4SR嘉泰姆

• USB总线供电系统4SR嘉泰姆

• 热插拔电源分配系统4SR嘉泰姆

• 电池充电系统4SR嘉泰姆

• 短路保护系统4SR嘉泰姆

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 USB Power Management4SR嘉泰姆

 USB Host and Self-Powered Bubs4SR嘉泰姆

 USB Bus-Powered Hubs4SR嘉泰姆

 Hot Plug-In Power Supplies4SR嘉泰姆

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 Short-Circuit Protections4SR嘉泰姆

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     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4SR嘉泰姆

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电路原理图 返回TOP4SR嘉泰姆


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