스위칭 펄스를 평균화하는 LPF
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Transcript of 스위칭 펄스를 평균화하는 LPF
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LPF 2005/06/2318:22http://blog.naver.com/ecima/80014298864
LPF
1. LC LPF . LPF . LPF LC.LC 5 , .
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1. MOSFET MOSFET OFF LC . MOSFET OFF . MOSFET A .
, . MOSFET .
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() . . .
2. 0A B(a) Tr1 Tr4 ON VDD L C Tr4 GND .
L . MOSFET OFF B(b) GND D2 L D3 I2 . B(c) Tr3 Tr2 ON. , VDD Tr3 C L Tr2 GND Tr3 Tr2 ON , L I2 . Tr2 Tr3 . I2 VDD Tr3 C L Tr2 GND I3 . C(b) .
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3. () B(a) L . , B(c) Tr3, Tr2 ON I2 . B(d) I4 . B(a) L I1 L . , I1 I2 2 . C(c) .
ON . OFF . . OFF LC .
2. LPF . . . LC . . . PWM .
1. (1) DC-DC 6 (Tr1) PWM (Tr3) PWM .
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. Tr3 Tr2 OFF, Tr4 ON Tr1 PWM . Tr2 . DC-DC . Tr1 Tr4 OFF, Tr2 ON Tr3 PWM . Tr4 . DC-DC . DC-DC . 2 PWM . PWM 50Hz .(2) 1) 7 .
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VDD100V 90% 90V, 80V . 2) . OFF 7(b) . 80% AC100V 180V .100 2/0.8176.8V 250V , 300V . , 95% AC100V 150V .AC100V 2/0.95148.9V 200V , 250V .3) . , DCDC . ON . , 0V .4) . 4 L1 LC . , 6(a) Tr1 OFF L1 . L1 Tr1 ON/OFF . .
2. . 8 2() 50%
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2 . IC UC3875/ 6/7/8/9 PWM IC . . OFF ( )
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IC .
