SLVAF82B August   2022  – January 2024 ESD122 , ESD204 , ESD224 , ESD2CANXL24-Q1 , ESD321 , ESD341 , ESD401 , ESD441 , ESD751 , ESD752 , ESDS302 , ESDS304 , ESDS312 , HD3SS3220 , SN65240 , TPD1E01B04 , TPD1E01B04-Q1 , TPD1E04U04 , TPD1E05U06 , TPD1E05U06-Q1 , TPD1E0B04 , TPD1E10B06 , TPD1E10B06-Q1 , TPD1E1B04 , TPD1E6B06 , TPD2E001 , TPD2E001-Q1 , TPD2E009 , TPD2E1B06 , TPD2EUSB30 , TPD2S017 , TPD3E001 , TPD4E001-Q1 , TPD4E004 , TPD4E02B04 , TPD4E02B04-Q1 , TPD4E110 , TPD4S009 , TPD6E004 , TPD6E05U06 , TPS65982 , TPS65994AD , TSD05C , TUSB211 , TUSB4020BI , TUSB4041I , TUSB8041 , TVS0500 , TVS1400 , TVS1800 , TVS2200

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Overview
  5. 2 USB 1.1
    1. 2.1 Overview
    2. 2.2 ESD Protection Requirements
    3. 2.3 System Level Design
  6. 3 USB 2.0 Circuit Protection
    1. 3.1 Overview
    2. 3.2 ESD Protection Requirements
    3. 3.3 System Level Designs
  7. 4 USB 5Gbps
    1. 4.1 Overview
    2. 4.2 ESD Protection Requirements
    3. 4.3 System Level Designs
  8. 5 USB 10Gbps
    1. 5.1 Overview
    2. 5.2 ESD Protection Requirements
    3. 5.3 System Level Designs
  9. 6 USB 20Gbps
    1. 6.1 Overview
    2. 6.2 ESD Protection Requirements
    3. 6.3 System Level Designs
  10. 7 USB Type-C® Protection
    1. 7.1 Overview
    2. 7.2 ESD Protection Requirements
    3. 7.3 System Level Designs
  11. 8 USB Power Delivery (USB-PD) Surge Protection
    1. 8.1 Overview
    2. 8.2 VBUS Protection
    3. 8.3 Short to VBUS
  12. 9 References
  13. 10Revision History

8.3 Short to VBUS

Protecting against a short to VBUS is another care about. In the case of short to VBUS, the CC and SBU pins can be exposed to the voltage on VBUS due to the proximity to VBUS. Figure 8-3 represents a cause of a short to VBUS event such as removing the connector improperly.

GUID-20231220-SS0I-8XSX-HNGR-HB0MNZMQTMH7-low.png Figure 8-3 Short to VBUS

As mentioned, the voltages for USB-PD can be in the range of 5V all the way up to 48V. This requires the same working voltage of a protection diode across CC, SBU, and VBUS pins to verify the system is protected from ESD. Device recommendations for these conditions are shown in Table 8-8. For more devices on short to VBUS protection, check out the USB-PD team at TI.

Table 8-2 Short to VBUS Device Recommendations
Device VRWM (V) IEC 61000-4-2 (kV) (Contact/Air-gap) Capacitance (pF) Channel Count Package Size (mm) Recommended For
ESD2CAN24-Q1 / ESD752 24 30/30 3 2 SOT023 (2.92 x 2.37 ), SOT-SC70 (2.0 x 2.1) VBUS, CC, SBU