PWM 調光應用 - shs.edu.tw

1 PWM PWM 1 10% 20% 3,800 456 260 2,298 PWM PWM CLK 1 PWM 2 PWM ( ) PWM (PWM Pulse Width Modulation) switching Inverter D DC-DC Converter UPS PWM 1 0 0 1 ( )

2 ( ) PWM switching ( ) .PWM .pdf ( ) PWM PWM PWM (power) ( ) PWM 3 .PWM .pdf ( ) PWM PWM 9V 50 ms 9V 50 ms 0V 10 (9V 1/2) PWM 50% 10Hz ( ) . PWM ( ) PWM PWM PWM PWM PWM PWM.

3 PWM PWM 4 ( ) . ( ) . 000 ~ 111( 0 8 ) 555 IC JK NAND .Tina 000~111 OPA 100Hz OPA 1 OPA IC PWM FET PWM 5 JK Clear Clear TP7 . TP7 . OPA TP3 TP2 TP1 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 ..OPA OPA TP3 TP2 TP1 TP4 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 1V.

4 PWM 6 . 100Hz TP5 TP6 2V .OPA . TP4 TP6 OPA PWM TP4 TP6 OPA TP4= = 0 % .. PWM 7 TP4= = 1 % TP4= = 1 % TP4= = 0 % TP4= = 1 % PWM 8 TP4= = 1 % TP4= = 0 % TP4= = 0 % PWM 9 PWM PWM PWM PWM OPA OPA OPA PWM PWM PWM PWM PWM

5 Pdf PWM II ( 96) 258