产品概述 返回TOPlZH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TOPlZH嘉泰姆
lZH嘉泰姆
• 双通道100 mΩ High-Side MOSFETlZH嘉泰姆
• 1A限流电流，且具有fold-back功能lZH嘉泰姆
• 工作电压范围:2.7V to 5.5VlZH嘉泰姆
• 300μs 输出电压上升时间lZH嘉泰姆
• 欠压保护功能lZH嘉泰姆
• 15μA 静态电流</p>
• 1μA 关断电流lZH嘉泰姆
• 低电平逻辑使能控制lZH嘉泰姆
• 芯片关断后没有反向电流</p>
• 具有延时功能的开漏输出限流指示信号</p>
• 8引脚SOP封装lZH嘉泰姆
• 符合RoHS规范及Pb-FreelZH嘉泰姆
Dual 100m High-Side MOSFETlZH嘉泰姆
Operating Range:2.7V to 5.5VlZH嘉泰姆
300μS Typical Rise TimelZH嘉泰姆
Under voltage LockoutlZH嘉泰姆
15μA Quiescent Supply CurrentlZH嘉泰姆
1μA Shutdown Supply CurrentlZH嘉泰姆
Logic Level Enable Pin, Available withlZH嘉泰姆
Active-Low VersionlZH嘉泰姆
No Reverse Current when Power OfflZH嘉泰姆
Open-Drain Over-Current Flag Outputs withlZH嘉泰姆
fault-blankinglZH嘉泰姆
Available in MSOP-8, SOP-8 and SOP-8(EP)lZH嘉泰姆
PackageslZH嘉泰姆
RoHS Compliant and 100% Lead(Pb)-FreelZH嘉泰姆
Halogen-FreelZH嘉泰姆
UL Listed-File No. E33429lZH嘉泰姆
应用范围 返回TOPlZH嘉泰姆
lZH嘉泰姆
• High-Side 电源开关</p>
• USB 电源管理系统lZH嘉泰姆
• USB主机和自供电的总线系统lZH嘉泰姆
• USB总线供电系统lZH嘉泰姆
• 热插拔电源分配系统</p>
• 电池充电系统lZH嘉泰姆
• 短路保护系统 lZH嘉泰姆
High-Side Power Protection Switch
lZH嘉泰姆
USB Power Management
lZH嘉泰姆
USB Host and Self-Powered Bubs
lZH嘉泰姆
USB Bus-Powered Hubs
lZH嘉泰姆
Hot Plug-In Power Supplies
lZH嘉泰姆
Battery-Charger Circuits
lZH嘉泰姆
Short-Circuit ProtectionslZH嘉泰姆
技术规格书（产品PDF) 返回TOP lZH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</span>！</span>
lZH嘉泰姆
中文
English
发表评论