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TVS2700: The definition of VRWM, VF, VBR, VFCCLAMP and VCLAMP in datasheet

Hung Ching Hsu
Expert 3086 points
Part Number: TVS2700
Other Parts Discussed in Thread: TVS3300,

Hi Team

My customer is considering TVS2700 or TVS3300 for their IO protection. 

The IO voltage is 24V.  I think if max voltage is under 27V in normal condition, TVS2700 is enough for them, am I right?

Please also let me know if we need more information to judge if customer can use TI's surge diode. 

My customer wants to know what's the definition of following parameter. Could you help with it? Thanks.

VRWM

VF

VBR

VFCCLAMP

VCLAMP

Regards, 
Jo

  • 0
    TI__Expert 8486 points

    Hi Jo,


    You are correct. If their IO voltage is 24 V, I would recommend TVS2700 as well. Please see below for parameter definitions. They are also available on our training page in the ESD Fundamentals articles. ESD and surge use a lot of the same terms.

    VRWM: reverse working voltage; the maximum positive and negative voltage where current flowing through the diode does not exceed a certain amperage when it is reverse biased (usually 10 nA)

    VF: forward voltage; the voltage drop across the diode when it is forward biased

    VBR: breakdown voltage; the voltage where current through the diode exceeds 1mA when it is reverse biased

    VCLAMP: the amount of voltage the system will receive when the reversed biased device is conducting during a surge event (ie shocking the IO pin)

    VFCLAMP: same as VCLAMP but when the device is forward biased (ie shocking the GND pin)

    Please let me know if you need any clarification on these.

    Regards,

    Matt Smith