New Renesas USB-C power solution improves performance
Renesas has introduced the RAA489300/RAA489301 high-performance buck controller designed with a three-level buck topology used for battery charging and voltage regulation in USB-C systems such as multiple-port USB-PD chargers, portable power stations, PC docking station, robots, drones, and other applications that need a high efficiency DC/DC controller.
The three-level buck converter topology enabled by the new IC delivers exceptional efficiency and significantly reduces the required inductance for regulating the output voltage. Its innovative design minimises power loss and reduces system size, making it ideal for compact, high-performance applications.
The three-level topology consists of two additional switches and a flying capacitor compared to a conventional two-level buck converter. The flying capacitor reduces voltage stress on the switches, allowing designers to use lower voltage FETs with better figures of merit. The result is reduced conduction and switching losses. This topology also enables the use of a smaller inductor with peak-to-peak ripple of only about 25 percent of that of a two-level converter, enabling reduced inductor core and direct current resistance losses.
Key Features of the RAA489300/RAA489301 battery charger and voltage regulator:
Wide range of input and output voltages for use in voltage battery packs and with various PD adapters
Integrated safety features with built-in protection mechanisms against overcharging, overheating, and voltage anomalies
Scalability for easily adapting to various power levels and application requirements
Optimised switching architecture divides voltage across power switches, improving efficiency
Minimises power consumption, contributing to greener, more sustainable designs
Lower thermal stress improves system reliability and extends product lifespan
