SLLS685D July 2006 – September 2015 TPD6E001
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
TPD6E001 is a diode array type Transient Voltage Suppressor (TVS) which is typically used to provide a path to ground for dissipating ESD events on hi-speed signal lines between a human interface connector and a system. As the current from ESD passes through the TVS, only a small voltage drop is present across the diode. This is the voltage presented to the protected IC. The low RDYN of the triggered TVS holds this voltage, VCLAMP, to a tolerable level to the protected IC.
For this design example, a single TPD6E001 is used to protect all the pins of three USB2.0 connectors.
Given the USB application, the following parameters are known.
|Signal range on IO1, IO2, IO3, IO4, IO5, IO6||0 V to 3.6 V|
|Signal voltage range on VCC||0 V to 5.25 V|
|Operating Frequency||240 MHz|
When placed near the USB connectors, the TPD6E001 ESD solution offers little or no signal distortion during normal operation due to low IO capacitance and ultra-low leakage current specifications. The TPD6E001 ensures that the core circuitry is protected and the system is functioning properly in the event of an ESD strike. For proper operation, the following layout/ design guidelines should be followed:
Figure 4 is a capture of the voltage clamping waveform of TPD6E001 on IO1 during a +8kV Contact IEC61000-4-2 ESD strike.