| 摘要 |
A two-channel converter for an LED lighting device according to the present invention includes: an LED module including a plurality of LED elopements; a rectifier circuit which rectifies AC voltage and outputs DC voltage; a first PWM driving circuit which supplies constant current pulse-width-modulated from the DC voltage to the LED module; a second PWM driving circuit which outputs constant current pulse-width-modulated from the DC voltage; an output monitoring conversion circuit which monitors output of the first PWM driving circuit and outputs a conversion signal; and a separation circuit which converts a state that the first PWM driving circuit supplies the constant current to the LED module into a state that the second PWM driving circuit supplies the constant current to the LED module according to the conversion signal. |
