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The board is a 35 W, wide-range mains input, power factor corrected SMPS (switched mode power supply) suitable for all low power applications requiring a high PF (power factor), such as lighting applications and power supplies for LEDs. The low-cost L6562A and the simple flyback topology combine to provide a very competitive PFC controller solution.
The main feature of this converter is that the input current is almost in phase with the mains voltage, therefore the power factor is close to unity. This is achieved by the L6562A controller, which shapes the input current as a sinewave in phase with the mains voltage.
The power supply utilizes a typical flyback converter topology, using a transformer to provide the required insulation between the primary and secondary side. The converter is connected after the mains rectifier and the capacitor filter, which in this case is quite small to avoid damage to the shape of the input current. The flyback switch is represented by the power MOSFET Q1, and driven by the L6562A.
|Sub-Category||Power Factor Correction|
|Eval Board Part Number||497-8248-ND|
|Eval Board Supplier||STMicroelectronics|
90 ~ 265 VAC
|THD @ Conditions|
|Efficiency @ Conditions|
Over Voltage Protection
Shutdown, Enable, Standby
|Application / Target Market||
LED Home Lighting
|Component Count + Extras||
60 + 4
|Main I.C. Base Part||