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TPD2E001: Length of acceptable DC voltage pulse

Part Number: TPD2E001

I'm using the TPD2E001 part in my design to protect an IC from overvoltage. The voltage (DC) is generated within the application (not externally, such as ESD). 

The electrical path is as follows: Connector -> 15k resistor -> IC pin.

The TPD2E001 IO pin is connected between the 15k resistor and the IC (on a pin that needs to be protected). High DC voltage is applied at the connector.

Peak voltage: 5kV

Length of pulse: ~20ms

Peak current: 330mA

Pulse characteristic: capacitive discharge (DC) (RC decay waveform)

Duty cycle: once every 2 minutes (max)

Can this part be used this way for overvoltage protection? What is the maximum length of the pulse that is OK for this part to handle?

  • Hi Aaron,

    ESD diodes are designed to protect from transients events in the nS - uS range. Once the diode is broken down, it generates a significant amount of heat as current goes through it. This will eventually cause thermal failures.This is why we recommend only applying static DC voltages at or below Vrwm. It's possible the TPD2E001 to survive this pulse however we don't have any data to confirm that. 

    There are better suited options designed to clamp DC voltages such as Zener diodes or Overvoltage protection ICs.

    Regards,

    Sebastian 

  • Appreciate the reply - I'll check for other parts. Thank you.