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AN2485 Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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AN2485 Scheda tecnica(HTML) 2 Page - STMicroelectronics |
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2 / 29 page ![]() Contents AN2485 2/29 Contents 1 Main characteristics and circuit description . . . . . . . . . . . . . . . . . . . . . 4 2 Test results and significant waveforms . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Harmonic content measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Inductor current in FOT and L6563 THD optimizer . . . . . . . . . . . . . . . . . 10 2.3 Voltage feedforward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.4 Start-up and RUN pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.5 Start-up at light load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.6 Open loop protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.7 Power management/housekeeping functions . . . . . . . . . . . . . . . . . . . . . . 17 3 Layout hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4 Audible noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5 Thermal measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 Conducted emission pre-compliance test . . . . . . . . . . . . . . . . . . . . . . 22 7 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8 PFC coil specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8.1 General description and characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8.3 Mechanical aspect and pin numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 |
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