Nuvoton Technology (hereinafter Nuvoton) recently announced the release of the new KM1M4BF series MCU and KM1M7AF/KM1M7BF series MCU.

The new MCU series is designed for motor and power control in industrial applications such as air conditioning, heat pumps, white goods, electric bicycles, EV charging, solar inverters, energy storage devices, and power supply units.

KM1M4BF Series MCU, Motor, and PFC Controller

The KM1M4BF series MCU is suitable for applications such as home appliances, air conditioning, electric bicycles, and EV motors. It operates at up to 120 MHz and is based on an Arm Cortex-M4F processor with integrated flash and SRAM, supporting an operating voltage of 2.9 to 5.5 V and an operating temperature of -40 degrees to 110 degrees.

Functionally, it provides various safety features including IEC60730 certification, power supply voltage detection, ADC failure diagnosis, clock error detection, and memory ECC. Includes a standard differential variable gain amplifier and window comparator, a high-speed ADC (2Msps), and simultaneous control of two motors and PFC to reduce the total number of components and platform costs.

Among the I/O of this product, the analog connectivity includes two sets of differential variable gain amplifiers (VGA) and four sets of comparators. The peripheral sets include eight sets of motor and power control PWM, complementary PWM outputs, dead time insertion, output change, duty cut, period cut, and simultaneous ADC trigger.

KM1M7AF/KM1M7BF Series MCU Power Controller

Nuvoton explained that the KM1M7AF series MCU is suitable for high-voltage power supply applications such as EV charging and energy storage, as it can control primary PFC (AC/DC) and secondary LLC (DC/DC) from a single MCU, reducing the number of components and platform costs.

It provides high-accuracy, high-speed feedback control through a high-speed ADC (2 Msps) and high-resolution PWM (208 ps). It controls up to two motors for heat pumps and commercial-grade air conditioning, while simultaneously providing state-of-the-art 3-phase interleaved PFC.

It operates at up to 160MHz and runs on an Arm Cortex-M7 core with integrated flash and SRAM, supporting an operating voltage of 3.5 to 5.5V and an operating temperature of -40 degrees to 110 degrees.

In addition, it provides various safety features identical to the previous product, such as IEC60730 certification, power supply voltage detection, and ADC failure diagnosis.

Analog connectivity includes five sets of differential variable gain amplifiers (KM1M7A0/1, KM1M7B series) and five channel comparators, and peripheral sets include 12 sets of motor and power control PWM, complementary PWM outputs, dead time insertion, output change, duty cut, period cut, and simultaneous ADC trigger.