The power bank reference design supports 2-4 cell configurations and features Dual Role Power functionality for versatile applications.
The reference design from Renesas introduces a USB-certified single-port power bank optimized for use with lithium-ion batteries. It supports configurations of 2 to 4 cells in series, with a default setting of 3 cells. Additionally, it incorporates a battery monitor function on the board, enhancing performance monitoring and safety.
The power bank features a USB Type-C port with Dual Role Power (DRP) functionality. This allows the port to support both sink mode for charging the power bank and source mode for delivering power to external devices. The source mode can also support a programmable power supply (PPS), making it versatile for various applications.
For customization, the power bank comes with standard firmware that can be adjusted by changing the board settings to accommodate configurations of 2, 3, or 4 cells. This flexibility is valuable for tailoring the power bank’s performance to specific needs.
The USB certification includes two configurations under Technical ID (TID) numbers: 1090007, RTK-251-1PowerBank3, which allows the device to handle 100W in sink mode and 45W in source mode, and 1090008, RTK-251-1PowerBank3, which supports 100W in sink mode and 15W with PPS in source mode.
A firmware generation support tool is provided. This GUI tool enables users to modify USB PD protocol parameters, offering more control over the device’s functionality and performance. This comprehensive toolset ensures that developers can easily customize and optimize the power bank for various applications, enhancing its versatility and usability.
This USB Power Delivery system features a single USB-Type-C port with a dual role capability, supporting Try.SRC mode for versatile power interaction. The power source can output standard voltages of 5, 9, 12, 15, and 20V, adding up to two additional voltages and supporting programmable power supply (PPS) at 5V and 5VProg. It can also sink power from 5 to 20V with variable input. It is unique to the model RTK0EUG011D06010BJ and includes a USB-Type-C Authentication Responder and a USB Power Delivery Firmware Update feature (PDFU). The battery charger is designed for Li-ion batteries, accommodating configurations of 2, 3, or 4 series cells, with a default setting of 3 cells. Additional features include trickle charging, five LED indicators for battery and USB port status, and protection mechanisms for over temperature at the USB-Type-C receptacle, over-voltage on VBUS voltage, and current on VBUS current, ensuring safe and reliable operation.
Renesas has tested this reference design. It comes with a bill of materials (BOM), schematics, assembly drawing, printed circuit board (PCB) layout, and more. The company’s website has additional data about the reference design. To read more about this reference design, click here.
