Two-Port Automotive USB 2.0 Hub With Short-to-Battery Protection Reference Design


Design files


TIDA-00845 is a dual-port USB 2.0 hub with the ability to withstand a short of up to 18-V DC on both downstream ports, as well as Level 4 IEC 61000-4-2 ESD protection, overcurrent conditions, and shorts to ground. This protection is provided by an integrated protection device - the TPD3S714-Q1. With short-to-battery (STB) protection, short-circuit protection, and a fixed current-limit load switch on both downstream ports, the TUSB4020BI USB 2.0 hub is isolated and protected from overvoltage and overcurrent conditions. Downstream port 1 includes a STB test simulator for applying 18-V DC, and two TPD3S714-Q1s to protect both the hub and a peripheral for easily demonstrating USB STB protection functionality.

  • Fully functional USB hub with built-in short-to-battery test simulator on downstream port 1
  • Short-to-battery protection (up to 18 V) on VBUS, DP/DM
  • Overcurrent protection current limit: 550 mA
  • IEC 61000-4-2 (Level 4) system-level ESD protection at VBUS, DP/DM
  • Short-to-ground protection on VBUS
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data

TIDUBG7A.PDF (10044 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRLT6.ZIP (10587 K)

Files used for 3D models or 2D drawings of IC components

TIDCC70.ZIP (8976 K)

Design file that contains information on physical board layer of design PCB

TIDRLT4.PDF (2272 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Application-specific port protection ICs

TPD3S714-Q1Automotive USB 0.55-A fixed current limit and  VBUS/D+/D- short-to-VBATT protection

Data sheet: PDF | HTML
Buck converters (integrated switch)

LMR14030SIMPLE SWITCHER® 40-V, 3.5-A, 2.2-MHz step-down converter with 40-uA IQ

Data sheet: PDF | HTML
ESD protection diodes

TPD1E05U060.5-pF, 5.5-V, ±12-kV ESD protection diode in 0402 package for High Speed Interfaces

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS748011.5-A low-VIN (0.8 V) adjustable low-dropout (LDO) voltage regulator with power good and enable

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74LVC1G125Single 1.65-V to 5.5-V buffer with 3-state outputs

Data sheet: PDF | HTML
USB hubs & controllers

TUSB4020BITwo-Port High-Speed 480Mbps USB 2.0 Hub

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Two-Port Automotive USB 2.0 Hub With Short-to-Battery Protection Design Guide (Rev. A) May 23, 2016
Design guide Touch Remote Control Reference Design With CapTIvate Technology (Rev. A) Dec. 06, 2016

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