26 PRODUCT UPDATE Issue 4 2023 Power Electronics Europe www.power-mag.com Addition to the RL78 family excels in performance stakes, says Renesas The latest addition to Renesas Electronics’ RL78 MCU family of eight- and 16bit devices is the RL78/G24. It has the highest performance among all the devices in the RL78 family, says the company, enhanced by an applicationspecific flexible application accelerator (FAA) and a fast CPU that can achieve an operating frequency of 48MHz. Peripheral functions include analogue and timer capabilities, making the MCU suitable for motor control, power supply control and lighting control. Using the FAA enables the device to distribute tasks such as inverter control, encryption, sensing, and arithmetic operations independently of the CPU to “substantially” boost processing speed and shorten development time, says Renesas. Developers can use MathWorks’ model-based design to improve system performance and identify issues before implementing on the MCU, observes Brian McKay, Global Strategic Partner Manager, MathWorks. “Mutual customers can use RL78 virtual models in Simulink to gain a variety of capabilities, including generating production-quality code, processor-in-the-loop testing, and maintaining a digital thread,” he adds. The RL78/G24 also has a 12-bit ADC capable of simultaneous sampling three channels with a maximum conversion speed of 1µs. It also has a high speed comparator with a latency of 50ns (typical). It is also equipped with DALI-2 function for the lighting communication standard. Operating temperature is up to 125°C. A standby function reduces power consumption, with the choice of Halt mode, which cuts power consumption by 60% compared to normal operation mode, and Stop mode, which reduces power consumption by 99% compared to Halt mode. These power-saving modes allow the device to use less power overall. The MCU is supplied in a compact, 3.0 x 3.0mm package. The Smart Configurator can be used to generate driver code for peripheral functions via a graphical user interface (GUI), similar to other RL78 devices. There is also a fast prototyping board, which comes with Arduino Uno and Pmod Type 6A interfaces and Grove connectors for access to all pins. The device can be debugged and programmed using only a USB cable. Evaluation kits for motor applications and power/lighting applications are also available. AH39xxQ sensors detect speed and direction A portfolio of high-sensitivity Hall-effect sensors make up theAH39xxQ. The robust sensors provide speed and directional data or two independent outputs. They are designed for industrial and automotive applications such as detecting rotational and linear speed/direction and determining the angular position of a rotating shaft. To align with automotive battery requirements, the dual output Hall-effect sensors operate over a wide supply voltage range of 2.7 to 27V. They also have a 40V absolute maximum rating in order to safely handle 40V load dumps. There is also -18V of reverse voltage protection to guard against incorrect battery connections. The electrostatic discharge (ESD) protection exceeds the automotive norms of 5kV human body model (HBM) and 2kV charge device model (CDM). Three operating and release (BOP/BRP) options are available, with typical values of 10/-10 gauss, 25/-25 gauss and 75/-75 gauss. The narrow operating window ensures accurate and reliable switching points, says the company. Dual-channel operation means the sensors can replace two latch switches, reducing PCB space and overall component costs. Combining chopperstabilised amplifiers with an advanced Hall plate design mitigates switch point drift, says Diodes, to ensure accurate measurements over a broad temperature range. There are also self-diagnostic features making them suitable for ISO 26262compliant systems. The devices enter a safe operating mode if an error, such as over-temperature or under-voltage lockout, is detected. The AH39xxQ series Hall-effect sensors from Diodes are AEC-Q100 Grade 0 qualified and manufactured in IATF 16949 certified facilities. They support PPAP (production part approval process) documentation and are supplied in TSOT25 packages. Automotive HV ICs connect directly to 12V battery The BD5310xG-CZ / BD5410xG-CZ series of Hall ICs have been designed for automotive applications which require magnetic detection. They are in response to the continuing computerisation of vehicle systems to meet demand for increasing electrification, comfort and safety, using additional
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