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          Audio headphone port circuit protection
          Publish:Shenzhen Tergy Technology Co., Ltd.  Time:2016-12-19
          Audio headphone port circuit protection
          Solution:
          Audio headphone port circuit protection
          Design description:
          Protection application:
          The maximum signal value of such audio lines up to 12 Vp-p, the operating frequency is less than 30kHz. At this frequency, without considering the capacitance of the suppressor. ESD electrical hazards exist.

          Solution description:
          As shown on the left, using discrete MLCV, so flexible layout. Since the audio signal has analog properties, it is recommended to use a single stage transient suppression diode array only when the signal negative value is -0.5V or more, because they can reduce the negative value of the audio signal when the value is large.

          Matching solutions:
          In addition to the above recommendations, the electronic tage MLV product portfolio also provides other solutions. For example, if a manufacturing process fails to handle components of 0402 specifications, a device of the same size as the 0603 specification may be selected.

          Regulatory issues:
          IEC 61000-4-2 is the most suitable standard for this interface. Through the test can prove that terminal products are not vulnerable to ESD hazards.

          Characteristic: not applicable.

          Application warning: not applicable.
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