bhl777
Full Member level 6
Hi all, I found one circuit like this: a PWM signal with tunable duty cycle is used to drive a power BJT. The output voltage is connected to the collector terminal of the BJT.
I think the output voltage will be a square wave voltage source. I am wondering if this one can be used to connect to the fluoresent. Would anyone advise me the following questions?
(1) is my understand correct that this circuit will generate a square wave voltage source with tunable duty cycle?
(2) If it is a square wave voltage source, will the high level around VCC(15V) and low level equals to GND?
(3) I am not sure if the fluoresant lamp can be modeled as the RLC tank. If so, and the square wave voltage source has voltage level from 0 to 15V, will this square wave voltage source good enough to power up the lamp?
(4) since this circuit has tunable PWM duty cycle, will it still be good to have the square wave with non-50% duty cycle and still maintain the operation of the lamp?
Thank you!
I think the output voltage will be a square wave voltage source. I am wondering if this one can be used to connect to the fluoresent. Would anyone advise me the following questions?
(1) is my understand correct that this circuit will generate a square wave voltage source with tunable duty cycle?
(2) If it is a square wave voltage source, will the high level around VCC(15V) and low level equals to GND?
(3) I am not sure if the fluoresant lamp can be modeled as the RLC tank. If so, and the square wave voltage source has voltage level from 0 to 15V, will this square wave voltage source good enough to power up the lamp?
(4) since this circuit has tunable PWM duty cycle, will it still be good to have the square wave with non-50% duty cycle and still maintain the operation of the lamp?
Thank you!