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Motor control in inverter appliances, building automation and industrial drives can benefit from the RA6T2 family of microcontrollers (MCUs), says Renesas Electronics. They are claimed to achieve higher performance and cost-efficient motor control and are supported with motor control tools and design kits. 

The RA6T2 MCUs feature peripheral functions and hardware accelerator designed specifically for motor control. They are intended for used in motor control designs in home appliances, smart home, industrial and building automation as well as inverter control. 

The 32-bit MCUs are based on the 240MHz Arm Cortex-M33 core, with 512kbyte flash ROM, 64kbyte SRAM and 16kbyte data flash.

Two independent ADC units offer high-speed conversion with a maximum speed of 0.16 microseconds and include a simultaneous sample and hold function for three channels to detect the three-phase current of a motor. Integral amplifiers can set gain according to the input voltage range and analogue components that were previously external are incorporated, including comparators which detect abnormal voltage input and over current. An adjustable PWM timer makes it easy to port existing algorithms. It also provides a PWM output cut-off safety function in the event of an abnormality. This feature set allows a single RA6T2 MCU to simultaneously control up to two brushless DC (BLDC) motors, says Renesas.

The embedded hardware accelerator includes both a trigonometric function unit (TFU) and an infinite impulse response (IIR) filter to offer increased performance and reduced CPU load enabling parallel tasks such as communication.

The TFU performs high speed calculations without the need for lookup tables, for effective use of ROM. The IIR filter offers co-efficient setting methods that make it easier to port from existing algorithms, says the company.

The RA6T2 MCUs are available in five package options, which are a 100-pin LQFP, 64-pin LQFP, 48-pin LQFP, 64-pin QFN and 48-pin QFN. 

They are supported by Renesas’ Flexible Software Package (FSP) for porting designs from other Renesas MCUs.

Renesas is also offering a range of design tools, including the RTK0EMA270S00020BJ motor control kit, a CPU board, an inverter board and a motor work bench graphical user interface (GUI) tool with real-time debugging and digital oscilloscope functionality. 

http://www.renesas.com 

Microchip Technology has expanded its gallium nitride (GaN) radio frequency (RF) power device portfolio with new monolithic microwave integrated circuits and discrete transistors that cover frequencies up to 20 GHz. The devices combine high power-added efficiency and high linearity for applications ranging from 5G to electronic warfare, satellite communications, commercial and defence radar systems and test equipment.

The devices are made using GaN-on-silicon carbide technology that Microchip says provides “the best combination of high-power density and yield”, as well as high-voltage operation and longevity of more than 1 million hours at a 255 degrees C junction temperature. 

The line-up includes GaN MMICs covering 2 to 18 GHz, 12 to 20 GHz, and 12 to 20 GHz with 3dB compression point (P3dB) RF output power up to 20W and efficiency up to 25 per cent, as well as bare die and packaged GaN MMIC amplifiers for S- and X-band with up to 60 per cent PAE, and discrete high electron mobility transistor devices covering DC to 14 GHz with P3dB RF output power up to 100W and maximum efficiency of 70 per cent. 

“Microchip continues to invest in our family of GaN RF products to support every application at all frequencies from microwave through millimetre wavelengths, and our product portfolio includes more than 50 devices, from low-power levels to 2.2 kW,” said Leon Gross, vice-president of Microchip’s discrete products business unit. “Together the products announced span 2 to 20 GHz and are designed to meet the linearity and efficiency challenges posed by the higher-order modulation techniques employed in 5G and other wireless networks, as well as the unique needs of satellite communications and defence applications.”

Microchip’s portfolio of RF semiconductors in addition to GaN devices ranges from gallium arsenide RF amplifiers and modules to low-noise amplifiers, front-end modules, varactor, Schottky, and PIN diodes, RF switches and voltage variable attenuators. 

Go to https://www.microchip.com