grizedale
Advanced Member level 3
The DCM current mode flyback topology bode plot is very simple?
....for a flyback , the bode plot of the Modulator and Power stage, simply starts with a horizontal line at the DC gain level.....then goes DOWN AT -20dB/decade at the pole, which is 1/(2*pi*R*C)
where R = load
and C = output cap
.....it then goes horizontal again at the ESR zero frequency = 1/(2*pi*esr*C)
Is this true?
But the problem is .....how can you find what is the DC Gain?
Apparently (from this forum) the expression for dc gain in the Marty Brown book is wrong.
....for a flyback , the bode plot of the Modulator and Power stage, simply starts with a horizontal line at the DC gain level.....then goes DOWN AT -20dB/decade at the pole, which is 1/(2*pi*R*C)
where R = load
and C = output cap
.....it then goes horizontal again at the ESR zero frequency = 1/(2*pi*esr*C)
Is this true?
But the problem is .....how can you find what is the DC Gain?
Apparently (from this forum) the expression for dc gain in the Marty Brown book is wrong.