Simplified development of USB PD and USB-C battery charging applications

05-04-2019 | Renesas | Power

Renesas Electronics Corporation has released two new reference designs that simplify and expedite the development of USB Power Delivery (PD3.0) and USB-C battery charging applications including USB-C computing hubs, car chargers, power banks, SSD enclosures, POS printers, and desktop displays. The RTK-251-1PowerBank3 and RTK-251-BuckBoostConverter2 are USB-IF PD3.0 certified design kits, and offer the first in a new series of reference designs for applications fulfilling the USB Type-C power and data connection standard.

The board is a three-cell (series connected) Li-ion battery power bank reference design that uses the R9A02G011 USB PD3.0 controller and ISL95538B buck-boost NVDC battery charger. Perfect for USB-C multi-battery-cell power banks, the reference design board comprises one USB Type-C port that supports the DRP feature, producing power in both directions via power source and power sink modes. When the power bank is in sink mode, it requests 5V, 9V, 15V, or 20V from a USB PD3.0 provider such as an AC adapter. When the power bank is in source mode, the Li-ion battery supplies 5V up to 20V asked from a PC, tablet, or smartphone. Also, the RTK-251-1PowerBank3 changes its DRP role based on the residual battery capacity displayed on the board’s LEDs.

The converter is a DC-DC module that uses the R9A02G011 USB PD3.0 controller and the ISL95338 bidirectional buck-boost voltage regulator. The reference design board is perfect for USB-C hubs as part of the USB-PD AC adapter connection. It allows 19V with 4.73A DC input power and produces USB-PD3.0-compatible VBUS output power. The reference design board supports PPS and has two USB Type-C receptacles for VBUS power output.

“The RTK-251-1PowerBank3 and RTK-251-BuckBoostConverter2 reference designs significantly speed up customers’ development schedules by providing tested and complete solutions ready to drop into any design,” said Andrew Cowell, vice president, Battery and Optical Systems Division, Renesas Electronics Corporation. “Renesas’ industry-leading USB-PD and USB-C products enable smaller form factors, faster charging, and higher efficiency for remarkably longer battery life.”
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