Renesas development of EV charging solutions
Renesas offers a complete portfolio of highly attractive building blocks for rapid development of EV charging solutions. Offerings include single-chip metrology microcontrollers for AC and DC measurement, 32-bit arm MCUs for application MCU, Analogue & Power products, flash memory, wireless and wired communication solutions, enabling customers to quick start their development of EV charging applications.
Renesas’ strong global partner network with countless MCU software and services offerings support customers in all stages of their design.
Block diagram example of an AC EV-Charger wall box:
- Microcontrollers
- Memory
- Interface
- Wireless communications solutions
- Wired connectivity
- Analog & Power
Renesas has a long history of supplying metrology microcontroller solutions to the global metering market. The RL78/I1C(512KB) is the latest member of a well-established family of 16-bit MCU microcontrollers for energy measurement applications up to high accuracy utility-grade electricity meters. Likewise, the RX23E-A is the latest member of the RX high-performance 32-bit microcontroller family that features an analog frontend, making it ideal for precision DC metrology applications.
RL78/I1C for AC metrology
The RL78/I1C integrates all the functions required for the metrology of electricity meters as found in AC EV chargers. It includes up to four 24-bit ΔΣ A/D converters, 32-bit Multiply-accumulator, independent power supply real-time clock, Segment LCD driver supporting up to 8 com, and AES hardware engine that supports the DLMS standard. For single-phase and three-phase meters, 24-bit ΔΣ A/D converters are used for current and voltage sensing to achieve highly accurate power metrology.
Renesas offers a range of highly developed off-the-shelf reference designs for single phase and three phase meters, with free-of-charge certification-ready metrology firmware.
RL78/I1C Key features
| RL78/I1C | RL78/I1C(512KB) | |
|---|---|---|
| CPU | RL78 16bit core, 32MHz (max.) | |
| MAC | 32-bit | |
| 24-bit ΔΣ A/D converter | 4-ch | |
| SAR A/D converter | 10bit, 6-ch | 12bit, 6-ch |
| Program Flash | 64KB to 256KB | 512KB (2 x 256KB) |
| Data Flash | 2KB | |
| SRAM | 6KB to 16KB | 32KB |
| RTC | with anti-tamper | |
| Package | 64-pin, 80-pin, 100-pin QFP | 80-pin, 100-pin QFP |
RX23E-A for DC metrology
The RX23E-A group microcontroller integrates an analog front-end with high precision 24-bit ΔΣ A/D converters ideal for measuring DC energy. The CPU is equipped with an RXv2 core that excels in DSP/FPU operations, enabling high-accuracy measurement, control and communication with a single chip.
Renesas offers a range of off-the-shelf reference designs for DC meters with free-of-charge metrology firmware.
RX23E-A Key features:
- CPU: 32-bit RXv2 (32MHz), DSP/FPU for digital signal processing
- Flash: 128KB to 256KB
- Data Flash: 8KB with BGO function
- SRAM: 16KB to 32KB
- Dual 24-bit delta-sigma A/D converter offering up to 23-bit effective resolution
- PGA: Rail-to-rail analog input, gain 1 to 128, offset drift 10 nV/°C, gain drift 1 ppm/°C
- Voltage reference: low drift 10ppm/°C with good temperature stability
Application / Host MCU
The flexible Renesas Advanced (RA) 32-bit microcontrollers (MCUs) are industry-leading 32-bit MCUs with the Arm® Cortex®-M33, -M23 and -M4 processor cores and PSA certification. RA delivers key advantages compared to competitive Arm Cortex-M MCUs by providing stronger embedded security, superior CoreMark® performance and ultra-low power operation. PSA certification provides customers with the confidence and assurance to quickly deploy secure IoT endpoint and edge devices.
RA6 and RA4 general purpose MCU families
The Renesas RA6 and RA4 microcontroller families use the high-performance Arm® Cortex®-M33 core with TrustZone®. In concert with the Secure Crypto Engine it offers Secure Element functionality. The integrated Ethernet MAC with individual DMA ensures high data throughput. The RA6 and RA4 are built on a highly efficient 40nm process and are supported by an open and flexible ecosystem concept—the Flexible Software Package (FSP), built on FreeRTOS—and are expandable to use other RTOSes and middleware. The RA6 and RA4 are suitable for IoT applications requiring Ethernet, future proof security, large, embedded RAM, and low active power consumption running the CoreMark® algorithm from Flash.
Non-volatile memory (NVM) is a key component at the heart of every EV system design. It holds critical data, controls how the system boots, allows for robust Over the Air (OTA) updates and affects overall performance. The Renesas AT25xx series of devices offer 256Kbit to 128Mbit drop in compatibility with industry standard products as well as the ability to enhance your application with additional features and class leading specifications.
The Renesas memory products including fixed voltage AT25SF/QF and wide VCC AT25FF and AT25XE FusionHD™ devices, feature industry standard features and pin outs that can work in any new or pre-existing design with enhanced performance from basic code shadow to high performance XiP.
Many applications such as EV chargers may require an RS-232 or RS-485 / RS-422 serial ports for various configuration, monitoring, and diagnostic functionality. Renesas offers industry-leading devices to enable efficient and reliable communication for industrial control including dual interface multi-protocol transceiver products. Supporting wide VCC, high noise immunity and high levels of ESD protection for reliable high-speed data transfer in many consumer and commercial EV charging applications.
Six ways Renesas enhances your serial port
- Enhanced ESD protection
- Full-featured transceivers with improved ESD protection upto ±8kV to ±15kV ESD protection when applications such as EV chargers and solar battery system ports connect to an exposed port.
- Full-featured transceivers with improved ESD protection upto ±8kV to ±15kV ESD protection when applications such as EV chargers and solar battery system ports connect to an exposed port.
- Ruggedized fault protected: Overvoltage protected (OVP)
- Overvoltage protected, or fault protected, transceivers are designed so that the bus pins can handle voltages much higher than those required by the application in noisy or risky environments.
- Overvoltage protected, or fault protected, transceivers are designed so that the bus pins can handle voltages much higher than those required by the application in noisy or risky environments.
- High-Speed transceivers
- Applications such as diagnostic ports, high power chargers, power control applications require high data rates for minimal latency and increased throughput.
- Applications such as diagnostic ports, high power chargers, power control applications require high data rates for minimal latency and increased throughput.
- Low voltage & Low power
- Most current-generation interface products have a “hot plug” function that disables the device when Vcc drops considerably below its nominal operating voltage.
- Most current-generation interface products have a “hot plug” function that disables the device when Vcc drops considerably below its nominal operating voltage.
- Low-Cost transceivers
- Single node connections can often use low-cost transceivers. These devices still offer fault tolerance with always enabled drivers, that do not require bus biasing.
- Single node connections can often use low-cost transceivers. These devices still offer fault tolerance with always enabled drivers, that do not require bus biasing.
- Multiprotocol
- Many applications need both an RS-232 and RS-485 serial port. The dual protocol devices integrate both transceivers into a single package. The single-channel device can be programmed for either interface. The two-channel configuration is very flexible as each channel can be either port.
Document links
Wi-Fi & Bluetooth
The DA16600 series is a highly integrated ultra-low-power Wi-Fi and Bluetooth® Low Energy Combo Module solution. Together they deliver the industry's lowest power consumption for IoT applications in a convenient form factor. The DA16600 is 802.11 b/g/n and Bluetooth® v5.1 compliance and integrates high level Wi-Fi security like WPA2/3 Personal and Enterprise. The DA16600 has an industry leading RF performance with TX output power of 18 dBm and RX sensitivity of 97.5 dBm. The DA16600 is a full standalone Wi-Fi/BLE Module with full Wi-Fi and Bluetooth® stack and full integration of PA and RF frontend. DA16600 has a Ready2Go system integration approach supporting a fully featured AT Command set as well as full Linux driver support through serial interface (SPI and UART).
DA16600 Key features
- Low Power SoCs: DA16200 (Wi-Fi) and DA14531(BLE)
- Wi-Fi Specs: IEEE 802.11b/g/n, 1x1, 20 MHz channel bandwidth, 2.4 GHz
- BLE Specs: Compatible with Bluetooth® v5.1
- Integrated Flash memory (4Mbyte)
- Build-in Wi-Fi BLE coexistence
- Worldwide Certifications: FCC, IC, CE, TELEC, SRRC, KC
- Part of Renesas Longevity program and guaranteed availability until 2030
Ultra-Low Power Wi-Fi + Bluetooth® LE Combo Module (dialog-semiconductor.com)
LTE
The Renesas RYZ014A module is an all-in-one, single-mode LTE category M1 module with worldwide deployment and roaming capability.
The module comprises an LTE Cat-M1 platform and all other elements necessary for a complete LTE Cat-M1 modem system. These include an LTE-optimized transceiver, a single complete RF front-end to support LTE Cat-M1 bands worldwide, and key interfaces, all in a single compact LGA package. The RYZ014A module also includes a carrier-proven LTE Cat-M1 protocol stack and a comprehensive software package for over-the-air device management and packet routing.
Features:
- Integrated cellular IoT module for LTE Cat-M1
- 3GPP Release 13
- Field proven LTE Cat-M1 software stack
- AT command interface
- 20.25 x 21.35mm LGA package with 108 pads
- uSIM Interface
- Low Power Saving Mode: 1µA
- Voltage 3.1V to 4.5V
- RoHS-compliant, halogen-free
- High output power supporting both power class options 20 and 23dBm
Pre-certified to global RF regulations and multiple mobile network operators.
Wi-SUN
Wi-SUN is a wireless sub-GHz communication standard specified by the Wi-SUN alliance using the frequency spectrum from 863 to 928 MHz. It supports various profiles covering home- and field area network applications.
Renesas offers sub-GHz wireless communication solutions with a high-performance IEEE802.15.4g-compliant system on chip, convenient starter kits, and software stacks certified by the Wi-SUN Alliance to simplify development and allow quick time to market.
The Renesas portfolio is based on two sub-GHz wireless communication devices; a wireless communications IC and microcontrollers (MCUs) with on-chip wireless function. The RAA604S00 wireless communications IC has built-in RF peripheral components and hardware supporting IEEE 802.15.4g/e, and realizes the lowest level of current consumption in the industry. The RAA604S00 wireless communications IC can be combined with the Renesas RX651 device with RXv2 core, large-capacity RAM, and enhanced security to enable larger Wi-SUN networks or Border Routers. The RL78/G1H MCU is a dual core device consisting of the ultra-low-power RL78 (16bit-MCU) core and an integrated RF transceiver (RAA604S00), this highly integrated system solution is mainly designed to support small Wi-SUN networks of 10 to 20 nodes. Choose from these two devices according to the needs of your system.
Wired and hybrid communications solutions
Power Line Communication (PLC) is a communication method that uses power lines as the medium. This is predestined for applications such as EVC (electrical vehicle charging) or HEMS (home energy management systems) in general. By using the existing power line infrastructure as the communication network, it is possible to build a system quickly and at low cost.
Renesas offers power line communication solutions consisting of high-performance and flexible PLC devices, optimized evaluation boards, and software stacks that makes it easy to realize robust communication over the powerlines depending on the overall system architecture. The portfolio comprises of two devices. The R9A06G037 and the R9A06G061.
The R9A06G037 is a high-performance NB-PLC (Narrow Band Power Line Communication) modem IC. It integrates a high-performance DSP core and a MCU core (Arm® Cortex®-M3). The DSP core mainly handles PLC PHY layer protocol, and the ARM core handles the upper layer protocol. R9A06G037 can support a variety of PLC protocols such as G3-PLC (CENELEC, ARIB and FCC), PRIME, Meters and More and others.
The second PLC modem in the portfolio, the R9A06G061, is based on similar building blocks to the R9A06G037, consisting of analog front-end (AFE), DSP, and MCU. The high-performance DSP performs OFDM modulation and demodulation signal processing (PHY layer), and the MCU handles protocol conversion to/from the host interface. The R9A06G061 is optimized for high-speed and stable long-distance communication in Peer-to-Peer (P2P) networks.
The next evolutionary step for narrowband powerline communication (PLC) technologies has taken place with the introduction of the “Hybrid” extension. Two of the major PLC Alliances, the G3-PLC alliance and the PRIME alliance have added an optional PHY media which comprises of the FSK communication compliant with IEEE802.15.4g/e. This allows each node in the network to use either PLC or RF communication depending on the best available channel and to keep maximum coverage. This combination of PLC and RF reassures designers who are concerned about coverage and reachability of communications when specifying only one media, the two technologies chosen for their robustness and communication distances, over 1km in both PLC and RF. To address these advancements Renesas is using the well-known connectivity products CPX3 (R9A06G37) and RF Transceiver (RAA604S00). Looking at the overall system architecture of Renesas’ G3-PLC hybrid solution, shown in Figure x, any end product platform can retain its flexibility and modularity and is able to extend a pure PLC product, into a hybrid one, by simply adding an RF transceiver module.
Power Line Communication (PLC) Solutions
Renesas Analog and Power solutions for electric vehicle charging
Renesas Electronics’ Analog and Power solutions for electric vehicle charging and smart grid infrastructure includes solutions starting from the AC mains input to the DC voltage and current needed for the application.
- AC/DC PrimAccurate™, primary-side regulation AC/DC flyback converters offer high-performance and low total BOM cost solutions for single phase and three phase connected systems.
- High-voltage, non-isolated buck converters provide auxiliary power supply solutions in systems where safety isolation is not required.
- DC/DC step-down buck converters for powering low voltage MCUs and communication ICs
PrimAccurate™ Isolated AC/DC converters and secondary-side Flyback for EV charging
| Part Number | Flyback Regulation | Max Operating Voltage | Output Power | Package | Controller or Integrated Power Device | Key Feature |
|---|---|---|---|---|---|---|
| iW1819 | PrimAccurate Primary-Side Regulation | 800V | 18W | SO-10 Batwing | Integrated BJT | Low EMI, low total BOM cost |
| iW1822 | PrimAccurate Primary-Side Regulation | 900W | 18W | SO-10 Batwing | Integrated BJT | Low EMI, low total BOM cost, high operating voltage |
| RAA223181 | Secondary-Side Regulation | 900V | 12W | SOIC16-13 | Integrated FET | SSR, CapSaver, Peak Power Mode, Low EMI |
| iW1821 | PrimAccurate Primary-Side Regulation | 1200V | 12W | SO-10 Batwing | Integrated BJT | Low EMI, low total BOM cost, very high operating voltage |
| iW1702 | PrimAccurate Primary-Side Regulation | Ext FET | 45W | SOT23-6 | External FET | Configurable Light-Load Mode |
Non-isolated AC/DC converters
| Part Number | Single-phase Three-phase | Max Operating Voltage | Output Power | Package | Controller or Integrated Power Device | Key Features |
|---|---|---|---|---|---|---|
| RAA223012 | Single-phase | 700V | 2W | TSOT23-5; SOIC-8 | Integrated FET |
- Low EMI |
| RAA223011 | Single-phase | 700V | 4W | TSOT23-5; SOIC-7; SOIC-8 | Integrated FET | |
| RAA223021 | Single-phase | 700V | 8W | SOIC-7 | Integrated FET |
Step-Down converters (Buck regulators)
| Part Number | Input Voltage | Output Voltage | Output Current | Package | Controller or Integrated Power Device | Key Feature |
|---|---|---|---|---|---|---|
| RAA211412 | 5.8V to 45V | Adjustable (0.8V min) | 1A | TSOT23-6 | Integrated High-Side 600mW FET | Internal compensation and soft-start |
| RAA211605 | 4.5V to 60V | Adjustable (0.8V min) | 0.5A | TSOT23-6 | Integrated High-Side 600mW FET | Internal compensation and soft-start |
| ISL85003/ ISL85003A | 4.5V to 18V | Adjustable (0.8V min) | 3A | TDFN 3mm x 4mm, 12 LD | Integrated Synchronous FETs | 500kHz w/external sync to 2MHz |
| ISL9107 | 2.7V to 5.5V | Adjustable (0.8V min) | 1.5A | DFN 2mm x 3mm, 8 LD | Integrated Synchronous FETs | Very low IQ skip mode Power Good Output |
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