EVL6562A-35WFLB STMicroelectronics

AN2838 Application note 35 W wide-range high power factor flyback converter evaluation board using the L6562A Introduction This application note describes a product evaluation board based on the transition-mode PFC controller L6562A, and presents the results of its bench demonstration. 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. Figure 1. EVL6562A-35WFLB evaluation board using the L6562A January 2014 DocID15099 Rev 2 1/23 www.st.comContents AN2838 Contents 1 Main characteristics and circuit description . 4 2 Electrical diagram and bill of material . 6 3 Test results and significant waveforms . 9 3.1 Harmonic content measurement 9 4 Thermal measurements . 14 5 Conducted emission pre-compliance test 15 6 Burst test . 16 7 Schematic with output voltage and current loop . 18 8 Power transformer specification 20 9 References 21 10 Revision history . 22 2/23 DocID15099 Rev 2