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AN4077 Datasheet(PDF) 2 Page - STMicroelectronics |
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AN4077 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 33 page ![]() Contents AN4077 2/33 Doc ID 022997 Rev 1 Contents 1 Main characteristics and circuit description . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Test results and significant waveforms . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1 Harmonic content measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.2 Inductor current in TM and L6564H THD optimizer . . . . . . . . . . . . . . . . . 12 4.3 Voltage feed-forward and brownout function . . . . . . . . . . . . . . . . . . . . . . 15 4.4 PFC_OK pin and feedback failure (open loop) protection . . . . . . . . . . . . 20 4.5 Power management and housekeeping functions . . . . . . . . . . . . . . . . . . 21 5 High-voltage startup generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6 Layout hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7 EMI filtering and conducted EMI pre-compliance measurements . . . 27 8 PFC coil specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.1 General description and characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.3 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8.4 Winding characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 8.5 Mechanical aspect and pin numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 8.6 Unit identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 |
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