黑河学院学报
黑河學院學報
흑하학원학보
HEIHE XUEYUAN XUEBAO
2012年
3期
125-126
,共2页
脉宽控制(PWM)%恒流%光电耦合器
脈寬控製(PWM)%恆流%光電耦閤器
맥관공제(PWM)%항류%광전우합기
pulse width control(PWM)%constant power%photocoupler
所设计电路以芯片UC3842为核心,恒流控制采用脉宽控制(PWM)方式,实现150mA--350mA可调恒流输出,为5—10个LED供电。电路还设有输出过压恒压保护电路及光控电路,实现输出过压时电压恒定在36V,同时还实现光控照明。
所設計電路以芯片UC3842為覈心,恆流控製採用脈寬控製(PWM)方式,實現150mA--350mA可調恆流輸齣,為5—10箇LED供電。電路還設有輸齣過壓恆壓保護電路及光控電路,實現輸齣過壓時電壓恆定在36V,同時還實現光控照明。
소설계전로이심편UC3842위핵심,항류공제채용맥관공제(PWM)방식,실현150mA--350mA가조항류수출,위5—10개LED공전。전로환설유수출과압항압보호전로급광공전로,실현수출과압시전압항정재36V,동시환실현광공조명。
This circuit is taken UC3842 as a core. Constant current control adopted the way of pulse width control( PWM), which made 150mA--350mA adjustable constant current output come true and provided power for five to ten LED . What's more, when being overvoltage output, the current could protect itself and has light control circuit, which make overvohage output 36V and light control come true.