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L6566ATR 数据表(PDF) 45 Page - STMicroelectronics |
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L6566ATR 数据表(HTML) 45 Page - STMicroelectronics |
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45 / 51 page  L6566A Application examples and ideas 45/51 Figure 30. Typical full-feature application schematic (FF operation) 4 7 3 5 11 6 8 IC1 L6566A Vout 9 C3 Q1 R2 D2 1N4148 R18 D1 C7 2.2 nF Y1 C8A,B T1 ZCD GD CS Vcc DIS GND COMP D4 IC3 PC817A R3 R4 D3 1N4148 3 4 C6 R5 C2 14 SS 13 C5 10 VREF 12 MODE/SC C4 R6 1 HVS OSC R1 R12 R13 R15 R16 R17 R8 C9 R9 R10 1 2 TL431 R7 NTC2 Vcc_PFC to Vcc pin of PFC controller C1 PFC Pre-regulator Output bus Output capacitor of boost PFC Pre-regulator VFF 16 AC_OK 15 to mains v oltage sensing Table 8. External circuits that determine IC behavior upon OVP and OCP OVP Latched OVP Auto-restart OCP Latched OCP Auto-restart L6566A VFF 15 RL RFF RH RFF needed if RL < 4.7 k Ω SS VREF 14 10 L6566A AC_OK 16 RH VFF 15 RL Diode needed if RL > 4.7 k Ω SS VREF 14 10 L6566A SS VREF 14 10 1N4148 VFF 15 RL RFF RH RFF needed if RL < 4.7 k Ω L6566A 16 15 SS VREF 14 10 1N4148 AC_OK RH VFF RL Diode needed if RL > 4.7 k Ω |
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