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TPD1E10B09-Q1: Input voltage = 20V behavior

Roy Chou1
Genius 13195 points
Part Number: TPD1E10B09-Q1

Hi Team,

The TPD1E10B09-Q1 has 13-V clamping voltage. Does it mean that the ESD can clamp the voltage as 13V when we input 20V?

Will it damage if we applied the 20V long time? (one minute)

Do we have clamp voltage around 8V? (auto-grade) And the VRWM > 7V


Regards,

Roy

  • 0
    TI__Genius 14240 points

    Hi Roy,

    Clamping voltage is a transient specification and will always be dependent on the test conditions. The 13 V clamping voltage spec is the clamping voltage taken during a 8/20us surge with a peak current of 1A. This would not translate to 13 V clamping if 20 V were present at the input. 

    20V would cause the diode to breakdown and start shunting current to ground. If the current was extremely low it could be possible but TVS diodes are not designed for constant conduction and can experience thermal failures when operating for extended amounts of time in the breakdown region. 

    This kind of overvoltage is better suited for zener diodes. 

    There aren't many ESD diodes that will have a working voltage of 7 V and clamp voltages around 8 V. There is typically at least a few volts margin between the working voltage and clamping voltage. Unofrtunately we won't have any devices in our portfolio that could meet this today. 

    Regards,

    Sebastian 

  • 0 in reply to Sebastian Muriel
    TI__Genius 13195 points

    Hi Sebastian,

    Sebastian Muriel said:
    20V would cause the diode to breakdown and start shunting current to ground. If the current was extremely low it could be possible but TVS diodes are not designed for constant conduction and can experience thermal failures when operating for extended amounts of time in the breakdown region. 

    1. What is the value of shunting current to current?

    2. Can we use two TPD1E10B09-Q1 in series to boost the VBR?

    Regards,

    Roy

  • 0 in reply to Roy Chou1
    TI__Genius 14240 points

    Hi Roy,

    1. I'm not too clear on the ask here. If you mean how much current the diode could safely shunt while breaking down, this is dependent on many factors such as pulse duration, peak voltage/current, trace impedance, etc. This is why our devices are tested to the IEC 61000-4-5 standards. This device is rated for 5.5 A of peak surge current protection per the 8/20us waveform. 

    2. You could use two of these to get a working voltage of 18V. Note that this would also theoretically double your clamping voltage.

    Regards,

    Sebastian 

  • 0 in reply to Roy Chou1
    TI__Genius 14240 points

    Hi Roy,

    1. I'm not too clear on the ask here. If you mean how much current the diode could safely shunt while breaking down, this is dependent on many factors such as pulse duration, peak voltage/current, trace impedance, etc. This is why our devices are tested to the IEC 61000-4-5 standards. This device is rated for 5.5 A of peak surge current protection per the 8/20us waveform. 

    2. You could use two of these to get a working voltage of 18V. Note that this would also theoretically double your clamping voltage.

    Regards,

    Sebastian