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R5F21276SDFPU0.pdf    

方案设计图：

方案关键器件表：

类型	型号	厂商	说明
MCU	R5F21276SDFP#U0	Renesas	IC R8C/27 MCU FLASH 32LQFP
PFC IC	R2A20113A	Renesas	Suitable for low power devices, secondary coil unnecessary
Schottky barrier diode	HRB0502A	Renesas	3-terminal face-mount outline (low VF)
Photocoupler(IGBT drive) for high voltage MOS	PS9306 (6p-SDIP)PS9506 (8p-DIP)	Renesas	High isolation voltage (5 kV r.m.s.), 0.6 A output ；High CMR (CMR = 25 kV)

方案描述：

Renesas product lineup includes the R8C Family of 8/16-bit MCUs with on-chip PWM (Pulse Width Modulation) generation and output functions. In particular, the 78K0 Series and the R8C/2x Series of MCUs integrate dimmer inverter control, PFC (Power Factor Correction) on/off control, and DALI communication functions, and are ideal for inverter fluorescent lamp applications such as ceiling-recessed fixtures that are compact and lightweight while consuming little power. In contrast to the conventional glow starter florescent lamps, inverter fluorescent lamps employ inverter technology which boost the switching frequency to more than 10,000 times per second, thus making a glow starter unnecessary. They also eliminate flicker and unpleasant buzzing while consuming 20% to 30% less power, thus making them more eco-friendly than the conventional lamp type. In addition, the inverter circuit can be used to adjust the light level. This is suitable for high-grade lighting fixtures and provides additional value. Recently, DALI　(Digital Addressable Lighting Interface) systems employing multiple lamps have been developed.