Overview
Description
The RL78/G24 Interleaved Power Factor Correction (PFC) + LLC 400W is a development and evaluation kit for digital power control using the RL78/G24 microcontroller, a low‑power 16‑bit MCU designed for real‑time control applications. A single MCU controls both the PFC stage and dual‑channel LLC resonant converters, enabling an efficient and compact digital power solution.
By combining RL78 low‑power technology with optimized pulse‑width modulation (PWM) control and flexible operating‑mode switching, the reference design achieves high peak efficiency (greater than 95%), excellent light‑load efficiency (greater than 90%), and ultra‑low standby power consumption (less than 0.3W at a 0.15W load).
Dedicated digital power control hardware enables complex control sequences and high‑precision PWM operation that are difficult to implement with analog methods. This simplifies compliance with energy‑efficiency regulations while reducing overall system cost through lower heat dissipation.
Features
- High‑efficiency operation enabled by the dedicated digital power‑control features of the RL78/G24 microcontroller, achieving up to 95% peak efficiency
- Maintains high efficiency even under light‑load conditions, greater than 90%
- Ultra‑low standby power consumption enabled by the low‑power design of the RL78, less than or equal to 0.3W at a 0.15W load
- Flexible and high‑speed digital power sequence control using the Flexible Application Accelerator (FAA), with minimal CPU load
- Integrated one‑chip control of a two‑stage Power Factor Correction (PFC) and LLC power architecture using the RL78/G24
- Built‑in overcurrent protection (OCP) and overvoltage protection (OVP) functions
- Power platform standardization through component commonization, helping reduce semiconductor supply risk
- Model‑Based Development (MBD) environment support
- Seamless support for simulation, configuration, and hardware evaluation using the QE for Lighting & Power tool
- Compatibility with multiple RL78 development environments
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| PCB Design Files |
ZIP
25.79 MB
The RL78/G24 Interleaved PFC + LLC 400W reference design targets high-power AC-DC power supply applications and uses the RL78/G24 MCU to implement single-MCU control of an interleaved PFC stage and a dual-channel LLC resonant converter. The PCB design files include the schematic, BOM, PCB layout files, and Gerber artwork, providing essential resources for evaluating the digital power control solution and supporting hardware customization and further development.
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| Manual - Development Tools |
PDF
6.62 MB
日本語
The RL78/G24 Interleaved PFC + LLC 400W reference design demonstrates high-efficiency digital power conversion using a single RL78/G24 microcontroller to control an interleaved CrM PFC stage and a dual-channel LLC resonant converter. This manual explains the system architecture, power topology, key circuit design considerations, and hardware usage to support evaluation and design understanding.
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| Tool News - Release | PDF 434 KB 日本語 | |
| Application Note |
PDF
1.23 MB
日本語
Describes how to control an interleaved CrM PFC and an LLC converter using the features of the RL78/G24 microcontroller.
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| Application Note |
PDF
3.29 MB
日本語
Describes the digital power converter control library using the Flexible Application Accelerator (FAA). The FAA is built into the RL78/G24 microcontroller and operates as a processor independent of the CPU.
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| Application Note |
PDF
2.83 MB
日本語
Describes how to implement constant voltage control by combining an interleaved CrM PFC with an LLC using the features of the RL78/G24 microcontroller.
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6 items
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Design & Development
Software & Tools
Software & Tools
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Software type
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Company
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| QE for Lighting & Power: Development Assistance Tool for Lighting and Digital Power System QE for Lighting & Power is an assistance tool for smart lighting and digital power solutions, integrating Renesas libraries, software, compilers, and evaluation boards for efficient development and validation. [Standalone Version] [Support MCU/MPU:RL78]
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Solution Toolkit | Renesas |
| CS+ Renesas integrated development environment (IDE) [Support MCU/MPU: RH850, V850, RX, RL78, 78K0R, 78K0]
(Note: CS+ is not generally promoted to U.S. and European customers.)
(Note: To use Smart Configurator on CS+ for RL78/G23 and RX family MCUs, install the Smart Configurator for each MCU family separately downloading from ”Design & Support” > ”Development Tools” > ”Smart Configurator”)
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IDE and Coding Tool | Renesas |
| e² studio - information for RL78 Family Eclipse-based Renesas integrated development environment (IDE).
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IDE and Coding Tool | Renesas |
| C Compiler Package for RL78 Family [CC-RL] C Compiler Package for RL78 Family [IDE: CS+, e² studio]
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Compiler/Assembler | Renesas |
| RL78 Smart Configurator RL78 Smart Configurator is a utility for combining software in ways that meet your needs. It simplifies the embedding of Renesas drivers in your systems through supports for importing middleware and drivers and configuring pins.
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Solution Toolkit | Renesas |
| Simulator for e² studio of RL78 Family Simulator for RL78 Family [Support IDE: e² studio] (Note: This product is included in the Renesas IDE "e² studio" and is not available separately.)
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Simulator | Renesas |
| E2 emulator [RTE0T00020KCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RH850, R-Car D1, RL78, RX, RISC-V MCU]
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Emulator | Renesas |
| E2 emulator Lite [RTE0T0002LKCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RL78, RX, RISC-V MCU]
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Emulator | Renesas |
| E2 Emulator (With Programming Function) On-chip debugging emulator available as a flash memory programmer [Available flash programming software: Renesas Flash Programmer] [Support MCU/MPU and devices: RE, RX, RL78, RH850, RISC-V MCU, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver]
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Programmer (Unit/SW) | Renesas |
| E2 Emulator Lite (With Programming Function) On-chip debugging emulator available as a flash memory programmer [Available flash programming software: Renesas Flash Programmer] [Support MCU/MPU and devices: RX, RL78, RISC-V MCU, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver]
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Programmer (Unit/SW) | Renesas |
| Renesas Flash Programmer (Programming GUI) Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU, Renesas Synergy, DA1453x, DA1459x, DA1469x, DA1470x, DA148xx, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
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Programmer (Unit/SW) | Renesas |
11 items
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