CXAS42289CXAS42289A是一种电流限制可编程USB开关，针对需要精确电流限制的应用进行了优化，或在重载/短路期间提供高达2.1A的连续负载电流。这些器件通过外部电阻提供75毫安到2.36安（典型值）之间的可编程电流限制阈值。在高电流限制设置下，可达到±6%的电流限制精度。控制上升和下降时间，以在开关过程中最小化电流过冲或过冲。该装置具有快速的短路响应时间，提高了系统的整体鲁棒性。它提供了完整的保护方案，如过电流保护、过温保护、短路保护，以及控制上升时间和欠压闭锁功能。开路漏极标志输出上的7.5ms脱胶时间可防止误过电流报告。CXAS42289 CXAS42289提供SOT33-5软件包。
最大负载电流不超过2.1A
精确可编程电流限制，75mA-2360mA
±6%精确可编程电流限值，1.63A，RLIM=15kΩ
JW7105:EN激活高JW7105A:EN激活低
过流期间的恒定电流
快速短路响应时间：2μs（典型值）
工作范围：2.7V-5.5V
内置软启动，典型上升时间为3ms
过电流和热保护
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[ CXAS42289 ]
目录
7.相关产品
产品概述 返回TOP
The CXAS42289 CXAS42289A is a current-limited programmable USB switches optimized for applications that require precise current limit, or to provide up to 2.1A of continuous load current during heavy loads/short circuits. Thesedevices offer a programmable current-limit threshold between 75mA and 2.36A (Typ.) by an external resistor. ±6% current limit accuracy can be achieved at high current-limit settings. The rise and fall timesare controlled to minimize current overshoot or undershoot during switches on/off. The device has fast short-circuit response time for improved overall system robustness. It provides a complete protection solutions, such as over-current protection,over-temperature protection and short-circuit protection, as well ascontrolled rise time and under-voltage lockout function. A7.5ms deglitch timeon the open-drain Flag output prevents falseover-current reporting. CXAS42289 CXAS42289Aoffers SOT23-5 packages.
产品特点 返回TOP
Up to 2.1A Maximum Load Current
Accurate Programmable Current Limit, 75mA-2360mA
±6% Accurate Programmable Current Limit, 1.63A with RLIM=15kΩ
JW7105:EN active high JW7105A:EN active low
Constant-Current During Over-Current
Fast Short-Circuit Response Time: 2μs (typ.)
Operating Range: 2.7V - 5.5V
Built-in Soft-Start with 3ms Typical Rise Time
Over-Current, and Thermal Protection
ESD Protection: 2kV HBM, 500V CDM
Available in SOT23-5Packages
应用范围 返回TOP
Set-Top Boxes
LCD TVs & Monitors
Residential Gateways
Laptops, Desktops, Servers, e-books, Printers, Docking
Stations, HUBs
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产品封装图 返回TOP
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电路原理图 返回TOP
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| 负载开关 | ||||||||
| P/N | Vin Min | Vin Max | 输出电流 | 静态电流 | 软启动 | 启动 | 过流保护 | 封装 |
| ( V ) | ( V ) | ( A ) | ( uA ) | |||||
| CXAS42287 | 2.5 | 5.5 | Dual-Channel 6A | 80 | External | Active High | N | DFN3×2-14 |
| CXAS42288 | 2.7 | 5.5 | Adjustable | 100 | Internal | Active High | Y | SOT23-6 |
| CXAS42288A | 2.7 | 5.5 | Adjustable | 100 | Internal | Active Low | Y | SOT23-6 DFN2×2-6 |
| CXAS42289 | 2.7 | 5.5 | 2.5 | 100 | Internal | Active High | Y | SOT23-5 DFN2×2-6 |
| CXAS42289A | 2.7 | 5.5 | 2.5 | 100 | Internal | Active Low | Y | SOT23-5 |
| CXAS42290 | 2.7 | 5.5 | 3 | 80 | Internal | Active High | Y | SOT23-5 |
| CXAS42290-1 | 2.7 | 5.5 | 1 | 80 | Internal | Active High | Y | SOT23-5 |
| CXAS42290-2 | 2.7 | 5.5 | 2 | 80 | Internal | Active High | Y | SOT23-5 |
| CXAS42290A | 2.7 | 5.5 | 3 | 80 | Internal | Active Low | Y | SOT23-5 |
| CXAS42290A-1 | 2.7 | 5.5 | 1 | 80 | Internal | Active Low | Y | SOT23-5 |
| CXAS42290A-2 | 2.7 | 5.5 | 2 | 80 | Internal | Active Low | Y | SOT23-5 |
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