TI中文支持网如将LDC芯片应用于大功率无线充电中异物检测中，该芯片工作是否会受到主功率强磁场的影响？是否有手段可以滤除该影响，使芯片能正常工作？
Kailyn Chen：
您好，关于LDC的应用，可以参考关于LDC xx系列芯片的FAQ的Q19&20：：e2e.ti.com/…/295036
Q19: What is the influence of a motor magnetic field on LDC?Answer: Motor magnetic fields will have no impact on LDC, if the oscillation frequency of the LDC is set to MHz range. The motor magnetic field frequency is drastically smaller, and thus cannot couple into the LC tank.
Q20: I am holding a permanent magnet close to coil and can see a decrease in inductance. Is the sensor affected by the magnetic fields of the magnet?
Answer: No. The permanent magnetic field does not interfere with the measurement. However, the conductive material which the magnet is made of acts as a target itself.
user4633481：
回复 Kailyn Chen:
你好，请问你们测试用的电机磁场频率和大小如何？在我的领域中，线圈上会有85KHz且大小为1-3mT的高频磁场。我测试在边长为5cm的正方形单匝线圈中大概会有1V左右的85KHz的感应电压。这会影响芯片工作吗？
Thank you for your reply. Could you give me more detailed information? What are the frequency andthe strength of the motor magnetic field you mentioned? In high power wireless charging field, the coils will be surrounded by strong time-varying magnetic field at a frequency of 85KHzanda amplitude ranging from 1mT to 3mT? In my test, the 85KHz induced voltage of a square coil with a length of 5cmcan reach approximately 1V. Will is reduced the accuracyand sensitivity of LDC seriously?
