TI ISOUSB211高/满/低速隔离USB中继器解决方案

TI公司的ISOUSB211是电隔离USB 2.0兼容的中继器,支持低速(1.5 Mbps),满速(12 Mbps)和高速(480 Mbps)信号速率.器件支持自动连接和速度检测,上拉/下拉分析,以及连接功率管理,允许顺便连接USB集线器,主机,外设和电缆隔离.器件还支持自动角色转换-如果断开连接后,新的连接在上行端口检测,然后上行和下行端口将互换. ISOUSB211已内置可编程的均衡,以消除电路板迹线所引起的信号损耗,有助满足USB2.0高速TX和RX眼图模板.该器件采用二氧化硅(SiO2)绝缘层,耐压高达5700 VRMS,工作电压1500 VRMS.器件支持宽的温度范围–40°C 到 +125°C.采用SSOP-28 (28-DP)封装.主要用在USB集线器,主机,外设和电缆隔离,医疗设备,工厂自动化,马达驱动,电网基础设施和供电.本文介绍了ISOUSB211主要特性, 简化功能框图和应用框图,多种应用框图, 评估模块ISOUSB211DPEVM主要特性,电路图,材料清单和PCB设计图.

ISOUSB211 is a galvanically-isolated USB 2.0 compliant repeater supporting low speed (1.5 Mbps), full speed (12 Mbps) and high speed (480 Mbps) signaling rates. The device supports automatic connect and speed detection, reflection of pull-ups/pull-downs, and link power management allowing drop-in USB hub, host, peripheral and cable isolation.

The device also supports automatic role reversal - if after disconnect, a new connect is detected on the Upstream facing port, then the Upstream and Downstream port definitions are reversed. The ISOUSB211 has inbuilt programmable equalization to cancel signal loss caused by board traces, which helps in meeting USB2.0 high-speed TX and RX eyediagram templates. This device uses a silicon dioxide (SiO2) insulation barrier with a withstand voltage of up to 5700 VRMS and a working voltage of 1500 VRMS.

Used in conjunction with isolated power supplies, the device protects against high voltage, and prevents noise currents from the bus from entering the local ground. The ISOUSB211 device is available for both basic and reinforced isolation (see Reinforced and Basic Isolation Options). It supports a wide ambient temperature range of –40°C to +125°C. The device is available in the small ...