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AN4213 数据表(PDF) 21 Page - STMicroelectronics |
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AN4213 数据表(HTML) 21 Page - STMicroelectronics |
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21 / 42 page ![]() DocID023984 Rev 2 21/42 AN4213 Designing a TM PFC where V ZCDH = 5.7 V (typ) and V ZCDL = 0 (typ) are given in the datasheet. We consider the highest value, for this reason the selected limiting resistor is R ZCD = 47 k Ω. The complete boost PFC schematic is given in the following figure. Figure 11. Boost PFC section AM17325v1 AC INV 1 COMP 2 3 MULT 4 CS ZCD GND GD VCC 5 6 7 8 + 400Vdc Fuse C1 L1 C20 D1 D2 D3 D4 C3 R25 R26 R2 R17 R18 L2 R20 R5 R4 R9 D5 NTC C7 R16 R7 R22 C6 C19 R27 C23 + D12 C24 C25 |
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