Automotive 2.4A Dual-Port USB Hub Reference Design With Short-to-Battery Protection
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Key Document


The TIDA-00887 is comprised of a two-port USB 2.0 hub with short-to-battery (STB) and short-circuit protection on both downstream ports provided by the TPD3S716-Q1. Both downstream ports are configured either as a custom divider mode or a dedicated charging port (DCP) provided by the TUSB4020BI-Q1 USB 2.0 hub if no upstream device is connected.  When an upstream is connected, the TUSB4020 hub supports charging via CDP. The ports automatically switch between divider mode, CDP mode, and DCP mode depending on the portable devices connected, in order to provide the fastest charging rate to the connected device.

This reference design is similar to the TIDA-00845, however, it removes the in-system STB simulator and adds functionality for 2.4-A charging and automatic charge detection.

  • Fully functional USB hub with short-to-battery (STB) protection and BC 1.2 charge detection
  • Supports USB 2.0 high-speed data rates
  • Adjustable overcurrent protection current limit up to 2.4 A
  • IEC 61000-4-2 (Level 4) and ISO 10605 system-level ESD protection on VBUS_CON, DP/DM
  • STB protection (up to 18 V) on VBUS_CON, VD+, VD-
  • Short-to-ground protection on VBUS_CON for both downstream ports

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Schematic/Block Diagram

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMR14050-Q1  SIMPLE SWITCHER® Automotive 40V, 5A, 2.2MHz Step-Down Converter with 40uA IQ  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPD2E2U06-Q1  Automotive Dual 1.5-pF, 5.5-V, ±25-kV ESD protection diode for USB & High Speed Interfaces  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules
TPD3S716-Q1  Automotive USB 2.0 interface protection w/ adjustable current Limit and Short-to-Battery protection  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS74801  1.5-A, low-VIN (0.8-V), adjustable ultra-low-dropout voltage regulator with power good & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
TUSB4020BI-Q1  Automotive Two-Port High-Speed 480Mbps USB 2.0 Hub  USB ICs  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMR14050-Q1 Download Download
Download Download
TPD2E2U06-Q1 Download Download
Download Download
TPD3S716-Q1 Download
TPS74801 Download Download
Download Download
TUSB4020BI-Q1 Download

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Technical documentation

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Data sheet (1)
Title Type Size (KB) Date
PDF 2930 31 Aug 2020
User guide (1)
Title Type Size (KB) Date
PDF 993 16 Dec 2016
Design files (6)
Title Type Size (KB) Date
ZIP 503 10 Jan 2017
ZIP 1894 10 Jan 2017
PDF 1818 10 Jan 2017
PDF 185 10 Jan 2017
PDF 63 10 Jan 2017
PDF 440 10 Jan 2017

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