SLVS928B March   2009  – August 2014 TPD4S012

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configurations and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Integrated ESD Clamps
      2. 7.3.2 USB Signal Pins
      3. 7.3.3 VBUS Line
      4. 7.3.4 Supports Data Rates in Excess of 480 Mbps
      5. 7.3.5 IEC 61000-4-2 (Level 4 Contact)
      6. 7.3.6 IEC 61000-4-5 Surge
    4. 7.4 Device Functional Modes
  8. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Signal Range on D+, D-, ID and VBUS pins
        2. 8.2.2.2 Operating Frequency
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8 Applications and Implementation

8.1 Application Information

The TPD4S012 is a four-channel Transient Voltage Suppressor (TVS) based Electrostatic Discharge (ESD) protection diode array for USB chargers and USB On-The-Go (OTG) interfaces.

The TPD4S012 provides IEC 61000-4-2 system level ESD Protection featuring 15 V tolerance on the VBUS line. The device is ideal for providing circuit protection for USB charger and OTG applications due to its high-voltage tolerance at the VBUS line and small flow-through package.

8.2 Typical Application

appschem_lvs928.gif
If the ID pin is not used, it can be left floating.
Figure 11. Typical Application Schematic

8.2.1 Design Requirements

For this design example, a single TPD4S012 is used to protect all pins of a micro/mini USB connector.

Given the USB application, the following parameters are known.

DESIGN PARAMETER VALUE
Signal range on D+, D–, and ID 0 V to 5 V
Signal range on VBUS 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 range on all the protected lines
  • Operating frequency

8.2.2.1 Signal Range on D+, D-, ID and VBUS pins

The TPD4S012 has 3 pins which support 0 to 5.5 V signals, these are suited for the D+, D–, and ID pins. The VBUS pin is suitable for the VBUS line, and has the benefit of being tolerant of voltages up to 16 V

8.2.2.2 Operating Frequency

The 0.8 pF (Typ) of the TPD4S012 support data rates in excess of 480 Mbps.

8.2.3 Application Curve

g_iecclamp_plus8kv_lvs928.gifFigure 12. IEC Clamping Waveform, 8 kV Contact, D+, 25 ns/div
g_vbusiecclamp_plus8kv_lvs928.gifFigure 14. VBUS IEC Clamping Waveform, 8 kV Contact, 25 ns/div
g_iecclamp_neg8kv_lvs928.gifFigure 13. IEC Clamping Waveform, –8 kV Contact, D+, 25 ns/div
g_vbusiecclamp_neg8kv_lvs928.gifFigure 15. VBUS IEC Clamping Waveform, –8 kV Contact, 25 ns/div