STMicroelectronics STUSB4500L USB-C controller

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The STUSB4500L from STMicroelectronics is a small-footprint addition to the company’s USB-C controller IC family designed and certified for pure 5 V sink-only applications. All mandatory features to use the USB-C connector as a 5 V universal power plug are integrated, allowing designers to implement USB-C charging solutions quickly and easily without studying the standard or writing code.

USB-C is rapidly becoming established as a replacement for Micro-B or Mini-B plugs, for both power and data connections, as it offers the advantages of reversible orientation and robustness — up to 10,000 connect/disconnect cycles. ST’s USB-C controller IC is a standalone, plug-and-play interface product, targeting low-voltage applications such as Bluetooth speakers, computer accessories, Wi-Fi access points, point-of-sale equipment, LED lighting and USB dongles. It can also be used for powering equipment such as single-board computers and hardware development kits.

The controller IC runs without additional code and requires no external support from the microcontroller, which eases adoption of the USB-C connector standard by saving time-consuming design work. It is auto-powered via V_BUS from the connected source and does not need to be supplied from a local battery or onboard power. Zero leakage current prevents draining the battery when not charging. Input overvoltage protection prevents low-voltage equipment being damaged if it is incorrectly connected, eg, to a 20 V source from a USB PD AC adapter rather than the required 5 V supply.

Further features include ‘dead-battery’ support to ensure correct identification by the source when the battery is fully discharged, true cold-socket implementation which keeps the V_BUS switch open by default until safe 5 V input power is supplied, source power-budget identification and error-recovery support to ensure correct restarting when a fault is triggered.

For more information: www.st.com/stusb4500l-pr.