TDK Micronas: Dedicated servo-drive micro-controller

Powered by a 32-bit CPU core (ARM Cortex-M3), the HVC 4223F chip addresses automotive servo applications.

(Photo: TDK Micronas)

The flexible peripherals of the HVC 4233F provide all means to directly control brush-type, stepper (bipolar or three phase), or brushless (BLDC) motors via the integrated high-performance half-bridges without the need for external drivers. Beside timers/counters, interrupt controller, multichannel ADC (analog-digital converters), SPI, and enhanced PWMs with diagnosis functions, this chip contains an advanced LIN UART with a LIN 2.x transceiver. The integrated voltage regulators connect the device directly to a 5,4-V to 18-V board network. Various power management modes optimize current consumption. The product further features a flash memory with a capacity of 32 KiB.

Typical application with a BLDC motor (Photo:TDK Micronas)

Various integrated digital and analog circuit units such as comparators with virtual star point reference, current scaling, and an embedded programmable gain amplifier allow users to minimize the number of external components. The computation capacity supports complex motor control algorithms such as Space Vector Modulation (SVM) for permanent magnet synchronous motors (PMSM) in addition to six-step commutation with sensor feedback or sensorless control, as well as various stepper configurations.