Hi,
I am using LM5025 in two seperate forward converter designs ( with active clamp). My intention is to synchronise them with a external clock at 450KHz. I have found a clock generating IC, which gives out square ( 50% duty cycle ) pulses at 450KHz.
I want to operate both converters with 0.65 to 0.7 max duty ratio. I am a bit confused with the following lines in datasheet page 14.
Both the frequency and the maximum duty cycle of the PWM controller can be controlled by the SYNC signal(withinthe limitationsof the volt × second clamp). The maximum duty cycle(D) is(1D) of the SYNCsignal.
Does this means maximum duty cycle attained when synchronised with square wave clock is 0.5? Do I need a clock generator with 0.65 ( or 0.7) duty ratio if I want converters to operate at 0.65 as max duty ratio?
Please answer.
Thanks.
