Automotive USB 2.0 interface protection with adjustable current limit

The Texas Instruments TPD3S716-Q1 is a single-chip solution for short-to-battery, short-circuit, and ESD protection with an adjustable current-limit for the USB connector’s VBUS and data lines in automotive USB hubs, head units, rear seat entertainment, telematics, and media interface applications. The integrated data switches provide best-in-class bandwidth for minimal signal degradation while simultaneously providing 18V short-to-battery protection. The high bandwidth of 1GHz allows for USB2.0 high-speed data rates for applications like Car Play. Extra margin in bandwidth above 720MHz also helps to maintain a clean USB 2.0 eye diagram with the long captive cables that are common in the automotive USB environment. The short-to-battery protection isolates the internal system circuits from any over-voltage conditions. On these pins, the device can handle over-voltage protection up to 18V for hot plug and DC events. The over-voltage protection circuit provides the most reliable short-to-battery isolation in the industry, shutting off the data switches in 200ns and protecting the upstream circuitry from harmful voltage and current spikes. The device supports VBUS currents up to 1.7A, allowing support for charging USB BC1.2 devices. The separate enable pins for data and VBUS allow for both host and client/OTG mode. It also integrates system level IEC 61000-4-2 and ISO 10605 ESD protection removing the need to provide external high-voltage, low capacitance diodes.