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DS90UB913/914多路同时使用问题

Other Parts Discussed in Thread: TPS4H160-Q1

TI工程师您好!

       我们目前在做的产品用到DS90UB913/914做视频远距离传输,其中一个问题请指导一下:我们在测试单路传输时发现负极(AGND网络)有比较强的信号,如果将DS90UB913/914的负极与电源的负极隔离如下图所示L5为隔离负极用的电感,便会出现无法锁定的问题;请问两路或两路以上的传输应该如何隔离每一路之间的信号串扰,与系统其它电路之间应如何隔离,以避免引响其它电路。

  • 使用high side switch, 可以解决干扰问题,另外 增加了保护,如TPS4H160-Q1, 

    http://www.ti.com/product/TPS4H160-Q1/description

    • Short-to-GND Protection by Current Limit (Internal or External)
    • Thermal Shutdown With Latch Off Option and Thermal Swing
    • Inductive Load Negative Voltage Clamp With Optimized Slew Rate
    • Loss-of-GND and Loss-of-Battery Protection