Power management reference design targets micromobility

August 26, 2020 // By Christoph Hammerschmidt
Micromobility solution integrates 32-bit MCU with battery frontend
A modular reference design from Renesas for 48V mobility solutions combines a 16-cell battery frontend with MCU and FPU on a single chip, enabling the implementation of complex inverter control algorithms.

The reference design allows the selection of different function blocks according to applications requirements, reduces product development time and reduces the bill of materials. With solution, e-scooters, e-bikes, uninterruptible power supplies (UPS) and energy storage systems can be developed faster.

It uses a modular approach to both hardware and software. This makes it possible to provide main components and optional function blocks that can be used in many applications with 24V to 48V, such as electric vehicles - but also chargers, cleaning robots and much more. The design uses 15 Renesas ICs including three key components: the 16-cell battery front-end (BFE) ISL94216, the rugged 100V MOSFET drivers HIP2211 and the 32-bit RX23T microcontroller (MCU) for motor control. The 48 V mobility winning combination is powered by a 25 Ah lithium-ion battery that drives an inverter (1600 W), reaching 5000 rpm.

"Micro-mobility, such as in the form of e-scooters and e-bikes, enables attractive locomotion with a small CO2 footprint for the first or last mile. The growing demand for these applications is driving new battery management features as cell balancing plays an increasingly important role in recharging," explains DK Singh, Director, Systems and Solutions Team at Renesas. "Our 48V Mobility Winning Combination helps our customers to develop their high performance, high torque e-scooters and e-bikes faster".

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