The power solution for Li-ion power banks offers dual USB output, smart charging, protection features, and a 4-LED battery status indicator in a compact design.
The need to keep multiple devices powered up and ready to go has become increasingly important in today’s fast-paced, tech-driven world. A dual-output power bank addresses this need by offering a convenient and efficient solution for simultaneously charging two devices. Whether travelling, working remotely, or simply managing a variety of gadgets, a dual-output power bank provides the versatility, time-saving benefits, and enhanced power management necessary to keep all your essential devices charged and ready. This makes it an indispensable tool for modern life, ensuring you’re always connected and prepared, no matter where you are. The RT9480 from Richtek is an integrated, user-friendly power solution for Li-ion power banks and other portable handheld devices.
The product is specifically designed for use in Li-ion power bank applications, providing a comprehensive and efficient power management solution for portable energy storage devices.
The reference design is an integrated single-chip solution that includes a linear charger, a synchronous boost converter with dual output load management, and support for a torch function. Branded as EZPBS (Easy to Use Power Bank Solution), this all-in-one chip features a linear charger, a synchronous boost converter with dual output load management, and support for a torch function. It also includes a 4-LED indicator to display battery capacity and charging or discharging status. The RT9480 comes in a compact WQFN-24L 4×4 package.
The product features include a compact BOM with a single-chip design, incorporating essential protection functions such as OTP, OVP, OCP, VBUS, and output short protection. It supports simultaneous charging and discharging through a smart algorithm. The charger features a linear charger with a capacity of up to 1.2A, Dynamic Power Management (DPM), thermal regulation, auto-recharge, and JEITA function support. The USB output supports dual USB outputs with auto and button control, and the sync boost can deliver up to 2.5A with peak efficiency at 97%. Additionally, the product includes a battery state of charge (SOC) indicator, battery SOC detection, NTC support for battery temperature sensing, and 4 LEDs for displaying battery SOC.
This product’s input voltage range is 3V to 4.2V. The USB output voltage is set at 5.1V, and the VBUS input voltage range is between 4.75V and 5.25V.
Richtek 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.
