It also utilizes 15 Renesas integrated circuits, including three key components: the ISL94216 16-cell battery front end (BFE), the robust 100V HIP2211 MOSFET drivers, and the 32-bit RX23T microcontroller (MCU) for motor control. The combined 48V mobility solution is powered by a 25Ah lithium-ion battery driving a 1600W inverter to achieve speeds of up to 5000 rpm.
The solution includes two boards that address the higher number of battery cells and power levels required by mobility applications. The BFE and charger boards focus on larger, higher-voltage battery packs. The motor control and inverter board features synchronized current/voltage measurements and controllers that are pulse-width modulated (PWM) to activate the motor and monitor its status. The algorithm, combined with the hardware, is ideal for driving brushless DC (BLDC) motors. Two optional boards are also available: a wireless charging receiver board and a Bluetooth® Low Energy (BLE 5.0) control board.
For system control, the combination solution uses a low-cost, energy-efficient RX23T MCU with a built-in floating-point unit (FPU) and six high-performance timers specifically designed for complex inverter control algorithms. These specific features and the modular design help engineers reduce development and debugging time for the software and hardware. Furthermore, unlike other single-chip, high-cell-count battery managers, the highly integrated ISL94216 offers several features that balance and monitor system conditions to improve battery life and safety, independent of the MCU. The winning combination solution also utilizes the ISL81601 60V 4-switch bidirectional synchronous buck-boost controller for ultra-fast charging. The controller's DC/CV charger profile is implemented through the MCU system.
Key features of the winning combined 48V
BFE and
ISL94216 mobility solution: 16-cell BFE supports up to 200mA + external cell balancing – key to enabling fast recharging and high utilization in large battery packs with hot-plug tolerance up to 62V.
BFE provides full high-side battery protection and monitoring for 4S to 16S cell battery packs.
Renesas' 32-bit RX23T MCU with built-in FPU supports full system control.
Renesas ISL28214 op-amps offer low power consumption and input bias, and the ISL81601 maximizes charging efficiency and uses current sensing and I/O monitoring to adjust input levels.
The Renesas ISL84051 multiplexer handles up to eight inputs with low RDSon connectivity and nanosecond switching times.
inverter and motor
control board supports a 48V battery pack and can reach 5000 RPM using a 1600-watt inverter powertrain with motor control sensors.
The inverter and motor control board includes a DC/DC converter, ISL
