8.2.1.1. AC Input ~ PFC Output
This section explains about the operations of AC filter circuit, Rectifier circuit and PFC circuit.
1) Filter Circuit, Rectifier Circuit 1
The filter part eliminates the noise from power supply unit not to leak it out, and also the circuit prevents an incoming noise.
Varistor Z1 deals with the excessive surge voltage from thunder, etc.
Rectifier circuit 1 rectifies input AC voltage at D1, which is input to PFC circuit.Varistors Z4 and Z5 deal with the excessive surge
voltage from thunder, etc.
Refer to Fig.1 (A), (B), (C)
2) PFC Switching Circuit
Rectified input voltage at D1 is boosted by the switching operation of transformer T1 (Main winding), FET Q6, diode D19, and
smoothed by electrolytic capacitors C18 and C19.
The voltage between both terminals of C18 and C19 becomes PFC output voltage (DC425V TYP.).
Refer to Fig.1 (D)
31
KX-TDA0103XJ / KX-TDA0104XJ / KX-TDA0108XJ / KX-TDA0103X / KX-TDA0104X / KX-TDA0108X
Содержание KX-TDA0103XJ
Страница 108: ...11 2 PSU M KX TDA0104XJ X 108 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 109: ...11 3 PSU L KX TDA0103XJ X 109 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 110: ...11 4 SCREWS AND WASHER 110 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 113: ...12 2 PSU M KX TDA0104XJ X 113 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 114: ...12 3 PSU L KX TDA0103XJ X 114 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 133: ...MEMO 133 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 141: ...MEMO 141 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 145: ...memo 145 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...
Страница 151: ...MEMO 151 KX TDA0103XJ KX TDA0104XJ KX TDA0108XJ KX TDA0103X KX TDA0104X KX TDA0108X ...