ADM3251E Power Off Tx Port Noise

Dear  All:

I have encountered now ADM3251E primary side power off ,at this moment secondary side TX port will be a malfunctioning signal ,cause signal transmission error , have any suggest solution provide to me refer.

Power ON:

Power Off:

Best

Jack

Parents
  • Hi Jack,

    When the VCC is decreased below the turn on threshold of DC-DC converter, the DC-DC converter will be disabled, and the isolated side power supply will be gone so that it can not guarantee isolated side working properly. The glitch can be seen when isolated side power supply drops to some level, and the Tout signal is undetermined at such condition. Can you detect this glitch and prevent by software?

    Regards,

    Neil

Reply
  • Hi Jack,

    When the VCC is decreased below the turn on threshold of DC-DC converter, the DC-DC converter will be disabled, and the isolated side power supply will be gone so that it can not guarantee isolated side working properly. The glitch can be seen when isolated side power supply drops to some level, and the Tout signal is undetermined at such condition. Can you detect this glitch and prevent by software?

    Regards,

    Neil

Children
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