0.1 µF

USB

Controller

R

T

R

T

V

BUS

D+

D–

GND

GND

IO2

D1

IO1

V

CC

7

TPD2E001

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SLLS684I – JULY 2006 – REVISED MARCH 2016

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8 Application and Implementation

NOTE

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.

8.1 Application Information

TPD2E001 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.

8.2 Typical Application

Figure 5. Typical USB Application Diagram

8.2.1 Design Requirements

For this design example, a single TPD2E001 is used to protect all pins of a USB 2.0 connector.

Given the USB application, Table 1 shows the Design Parameters:

Table 1. Design Parameters

DESIGN PARAMETER

VALUE

Signal range on IO1, and IO2

0 V to 5 V

Signal voltage range on VCC

0 V to 5 V

Operating frequency

240 MHz

8.2.2 Detailed Design Procedure

To begin the design process, some parameters must be decided upon; the designer needs to know the following:

•

Signal voltage range on all the protected lines

•

Operating frequency

The VCC pin can be connected in two different ways:

1. If the VCC pin is connected to the system power supply, the TPD2E001 works as a transient suppressor for

any signal swing above VCC + VF. A 0.1-μF capacitor on the device VCC pin is recommended for ESD