isurunalaka
Member level 5
Could anyone please give me some understanding about how this half bridge drive circuit's oscillation frequency is obtained? First lower transistor turns on due to diac and then current flow through 3 winding transformer's primary winding in a manner that is going to turn on upper transistor when primary core is saturated due to input current from the supply voltage. Then, after upper transistor turns on, current in flows in opposite direction in transformer primary winding and when it saturate negatively lower transistor turns on and cycle repeats. Hope what i said was true about the process. So if anyone give me some insight about how to derive the operating frequency of the CFL bulb, it would be very helpful to me.
Quick response are much more appreciated.