• [ CXUS7743 ]

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目录

1.产品概述       2.产品特点     LJi嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）LJi嘉泰姆

5.产品封装       6.电路原理图  LJi嘉泰姆

7.相关产品LJi嘉泰姆

   产品概述 返回TOPLJi嘉泰姆

      CXUS7743是一种双信道的电源开关芯片，内部集成了两个100mΩ 的P型MOSFET功率管，每个信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)，CXUS7743和CXUS7743-15每个通道的限流电流设置典型值分别为1A和2.5A。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，切断功率信道以防止芯片损毁；另外，CXUS7743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。CXUS7743可以在芯片关断的时候阻断反向电流的发生。CXUS7743封装采用MSOP-8或SOP-8封装。The CXUS7743 incorporates dual 100mΩ 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_typical for CXUS7743 and 2.5A_typical for CXUS7743-15 respectively. 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 CXUS7743 eliminates any reversed current flow across each switch when it is powered off. The CXUS7743is available in MSOP-8 or SOP-8 package, operates over the extended (-40°C to +85°C) temperature range.

   产品特点 返回TOPLJi嘉泰姆

• 双通道100 mΩ High-Side MOSFETLJi嘉泰姆

• 1A限流电流，且具有fold-back功能LJi嘉泰姆

• 工作电压范围:2.7V to 5.5VLJi嘉泰姆

• 300μs 输出电压上升时间LJi嘉泰姆

• 欠压保护功能LJi嘉泰姆

• 15μA 静态电流LJi嘉泰姆

• 1μA 关断电流LJi嘉泰姆

• 低电平逻辑使能控制LJi嘉泰姆

• 芯片关断后没有反向电流LJi嘉泰姆

• 具有延时功能的开漏输出限流指示信号LJi嘉泰姆

• 8引脚SOP封装LJi嘉泰姆

• 符合RoHS规范及Pb-FreeLJi嘉泰姆

Dual 100m
High-Side MOSFETLJi嘉泰姆

Operating Range:2.7V to 5.5VLJi嘉泰姆

300μS Typical Rise TimeLJi嘉泰姆

Under voltage LockoutLJi嘉泰姆

15μA Quiescent Supply CurrentLJi嘉泰姆

1μA Shutdown Supply CurrentLJi嘉泰姆

Logic Level Enable Pin, Available withLJi嘉泰姆

Active-Low VersionLJi嘉泰姆

No Reverse Current when Power OffLJi嘉泰姆

Open-Drain Over-Current Flag Outputs withLJi嘉泰姆

fault-blankingLJi嘉泰姆

Available in MSOP-8, SOP-8 and SOP-8(EP)LJi嘉泰姆

PackagesLJi嘉泰姆

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

Halogen-FreeLJi嘉泰姆

UL Listed-File No. E33429LJi嘉泰姆

   应用范围 返回TOPLJi嘉泰姆

• High-Side 电源开关LJi嘉泰姆

• USB 电源管理系统LJi嘉泰姆

• USB主机和自供电的总线系统LJi嘉泰姆

• USB总线供电系统LJi嘉泰姆

• 热插拔电源分配系统LJi嘉泰姆

• 电池充电系统LJi嘉泰姆

• 短路保护系统
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High-Side Power Protection Switch
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USB Power Management
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USB Host and Self-Powered Bubs
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USB Bus-Powered Hubs
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Hot Plug-In Power Supplies
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Battery-Charger Circuits
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Short-Circuit ProtectionsLJi嘉泰姆

   技术规格书（产品PDF) 返回TOP LJi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！LJi嘉泰姆

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产品封装图 返回TOPLJi嘉泰姆

aLJi嘉泰姆

电路原理图 返回TOPLJi嘉泰姆

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◀ 上一篇:USB电源分配开关CXUS7741 CXUS7742 62mΩ高侧MOSFET功率开关满足USB规范的压降要求当输出电压降到1.5伏时器件将电流限制在较低安全水平在短路或过载过温保护将结温限制在140℃以下

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下一篇▶: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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