CXAS42279集成的双通道87mΩ电源开关用于自供电和总线供电的通用串行总线（USB）应用逻辑电平启用引脚用于高电平或低电平内置电荷泵用于驱动二极管的N沟道MOSFET以消除开关断电时的反向电流

CXAS42279是一个集成的双通道87mΩ电源开关，用于自供电和总线供电的通用串行总线（USB）应用。有几种保护功能，包括带折叠的限流和热关机，以防止在连续重负载或短路发生时，由于增加功耗而导致灾难性开关故障。内置电荷泵用于驱动无寄生体二极管的N沟道MOSFET，以消除开关断电时的反向电流。OC是开路漏极输出报告过流或过温事件，具有典型的9ms脱胶超时时间。
87mΩ高边MOSFET
·提供4种版本的电流限制和折叠
工作范围：2.7V至5.5V
·400μS典型上升时间
“欠压锁定
·65μA静态电源电流
·1μA最大关闭电源电流
逻辑电平启用引脚，可用于高电平或低电平

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXAS42279 is an integrated dual channel 87mΩ power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. Several Protection features include current limiting with foldback, and thermal shutdown to prevent catastrophic switch failure caused by increasing power dissipation when continuous heavy loads or short circuit occurs. And a built-in charge pump is used to drive the N-channel MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. OC is open-drain output report over-current or over-temperature event and has typical 9ms deglitch timeout period.

   产品特点 返回TOP

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„ 87mΩ High-Side MOSFET 

„ Available with 4 Versions of Current Limits with Foldback 

„ Operating Range:2.7V to 5.5V 

„ 400μS Typical Rise Time 

„ Under voltage Lockout 

„ 65μA Quiescent Supply Current 

„ 1μA Maximum Shutdown Supply Current 

„ Logic Level Enable Pin, Available with Active-High or Active-Low Version 

„ No Reverse Current to VIN when Power Off 

„ VOUT OFF Discharge 

„ Deglitched Open-Drain Over-Current Flag Output ( OC ) 

„ SOP-8 Package and TDFN3X3-8 Package 

„ UL Approved_#E232223 

„ Nemko IEC 60950-1 CB/CCA_scheme certification Report #67291 

„ CSA Approved #230321

   应用范围 返回TOP

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„ High-Side Power Protection Switch 

„ USB Power Management 

„ USB Host and Self-Powered Bubs 

„ USB Bus-Powered Hubs 

„ Hot Plug-In Power Supplies 

„ Battery-Charger Circuits

   技术规格书（产品PDF) 返回TOP 

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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！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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Dual Power Switch
Part NO.	Vin(V) min.	Vin(V) max.	RON (Ohm)	VOUT rising   (μs)	Ilimit (A)	OC Flag	Discharge (Ohm)	Note	Package
CXAS42277	0.8	5.5	10	ADJ	6	N	220	3V ~ 5V Vbias  Needs	AQFN2X2-10
CXAS42278	0.8	5.5	16	ADJ	6	N	220	3V   ~ 5V Vbias Needs	TDFN2X3-14
CXAS42279	2	5.5	87	400	2	Y	200	UL,CB,A/B/C/D/ ILimit=2A/1.5A/1A/0.75A	SOP-8
CXAS42280	2.7	5.5	100	400	1	Y	N	UL,   CB	SOP-8
CXAS42281	2.7	5.5	74	1000	2	Y	N	SS	TDFN2X2-8
CXAS42282	2.7	5.5	72	400	2	Y	N	UL,CB,EOUT1/2 ILimit=2A/1A, A/B/C/D/ ILimit=2A/1.5A/1A/0.75A	TDFN3X3-10
CXAS42283	2.7	5.5	118	400	0.45	Y	N	N/A	SOP-8
CXAS42284	2.7	5.5	118	400	2	Y	N	N/A	SOP-8
CXAS42285/6	2.3	5.5	200	--	0.27	Y	N	A/B/C/D ILimit=0.27A/0.17A/0.25A/0.15A	TSOT-23-5