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USB Media Hub

A media hub provides an interface from the vehicle’s infotainment system to personal electronic devices such as smartphones and tablets. In addition to providing a data link, the media hub also supplies power to charge batteries of these devices. Power delivery enables the quick charging of devices by providing up to 100W of power via the media hub.

Microchip’s leadership position in USB Media Hubs comes from our early involvement with car makers to co-develop solutions and product roadmaps. Our market knowledge of both the consumer and automotive markets allows us to understand trends that enables us to help you develop products with differentiated features for this application.

USB Media Hub Block Diagram


USB Hub Controllers

The Microchip USB4914 is a USB 2.0 Hi-Speed hub with unique Smart Hub features targeted to automotive consumer ports and head unit applications. This highly integrated chip optimizes board area and reduces overall system costs, with the incorporation of leadership functionality, including Multi-Host Endpoint Reflector, battery charging support for industry profiles, embedded 32-bit microcontroller for the implementation of USB IO bridging and USB power delivery. The multiple downstream USB ports support USB 2.0 Low-Speed/Full-Speed/Hi-Speed with a single USB2.0 Hi-Speed upstream port for host connection.

  • USB4914 – USB2.0 Hi-Speed hub with unique Smart Hub features

USB Power Delivery Controllers

The UPD350 can control up to 100W of power delivery current and voltage using an external power device. Alternatively, the UPD350 can operate as a standalone UFP basic Type-C™ (non-PD) controller. It integrates many of the analog discrete components required for USB Type-C PD applications, including two VCONN FETs with Rp/Rd switching, a power switch, and current and voltage sense circuitry for over-voltage/current detection. By integrating many of the analog discrete components required for USB Type-C PD applications, the UPD350 provides a low-cost, low-power, small-footprint solution for power delivery applications.

  • UPD350 - Highly integrated small form factor USB Type-C™ power delivery 3.0 port controller

Digital Signal Controllers

Microchip’s Digital Signal Controllers (DSCs) are 16-bit MCUs with an integrated Digital Signal Processor (DSP) engine and are ideal for switched-mode power supplies such as AC/DC, DC/DC, UPS and PFC, providing high-precision digital control of buck, boost, fly-back, half-bridge, full-bridge, LLC and other power circuits to reach the highest possible energy efficiency.

  • dsPIC33EP128MC502 – 16-bit digital signal controller with high-speed PWM, op amps and advanced analog
  • dsPIC33CK64MP505 – 100 MHz 16-bit digital signal controller with high-resolution PWM and CAN-FD

MOSFET Drivers for Sync Boost/Buck

Microchip’s portfolio of MOSFET drivers comprises a wide variety of configurations providing for flexibility of design. Half-bridge drivers with adaptive dead-time and shoot-through protection, single and dual low-side drivers available in inverting, non-inverting, complementary configurations and high-side drivers that feature latch up under-voltage lockout protection.

  • MIC4605 – Half-bridge, 85V, MOSFET driver

Temperature Sensors

Microchip’s lineup of temperature sensors and switches comprise analog and digital outputs, giving you the flexibility you need for your design. Our automotive-grade temperature sensors are factory calibrated with up to +/-0.5°C accuracy over a temperature range of -40°C to 125°C. And with very small form factors, they provide an ideal solution for temperature sensing without consuming a significant amount of board space.

  • MCP9700A - Low-power linear active thermistor ICs, analog output
  • MCP9800 - 2-wire high-accuracy temperature sensor, digital output
  • MCP9504 - Temperature switch with selectable hysteresis

Flash Memory

The USBF4100, a USB firmware memory chip, is a companion to the Microchip Automotive USB Smart Hub devices.  Full custom programming alternatives are available upon request with latest version of the binary firmware, which contains application firmware and default hub configuration settings. The USB Firmware memory family features a four-wire, SPI-compatible interface that allows for a low pin-count package, which occupies less board space and ultimately lowers total system costs. It is manufactured with proprietary, high-performance CMOS SuperFlash® technology. The split-gate cell design and thick-oxide tunneling injector attain better reliability and manufacturability compared with alternate approaches.

  • USBF4100 - USB Hub 512KB Firmware Memory
Development Tools

The MIC4605 is an 85V half-bridge MOSFET driver that features adaptive-dead-time and shoot-through protection. The adaptive-dead-time circuitry actively monitors the half-bridge outputs to minimize the time between high-side and low-side MOSFET transitions, thus maximizing power efficiency. Anti-shoot-through circuitry prevents erroneous inputs and noise from turning both MOSFETs on at the same time. Additionally, the MIC4605’s adjustable gate drive sets the gate drive voltage to VDD for optimal MOSFET RDS(ON), which minimizes power loss due to the MOSFET’s RDS(ON).

The Explorer 16/32 Development Kit is a flexible, convenient and ready to start development, demonstration and testing platform for 16-bit PIC24 MCUs, dsPIC® DSCs and 32-bit PIC32 MCUs. The board accepts Processor Plug-In Modules (PIM) and hardware expansion is possible through the use of PICtail™ Plus daughter cards and mikroBUS™ accessory boards.

The Serial SuperFlash® Kit 2 allows evaluation of Microchip's Serial Flash Devices which are made using the SST SuperFlash® technology. The Serial SuperFlash Kit 2 contains three Serial Flash Daughter Boards. The Serial Flash Daughter Board is an evaluation board designed to interface with the mikroBUS™ connector on the Explorer 16/32 Development Board (DM240001-2). It can also interface with the PICtail™ Plus connector located on the Explorer 16 Development Board (DM240001).

The MCP9700 Temperature-to-Voltage Converter PICtail™ Demo Board demonstrates how to interface the MCP9700 to a microcontroller. This can be used by the system designer as an example of how to integrate an analog temperature sensor into systems.

The MCP9800 Temperature Sensor Demo Board demonstrates the sensor’s features. Users can connect the demo board to a PC with USB interface and evaluate the sensor performance. The 7-Segment LED displays temperature in degrees Celsius or degrees Fahrenheit; the temperature alert feature can be set by the users using an on-board potentiometer. An alert LED is used to indicate an over temperature condition. In addition, temperature can be datalogged using the Microchip Thermal Management Software Graphical User Interface (GUI). The sensor registers can also be programmed using the GUI.