Maximum output current in a classical forward converter
primary magnetizing slope
sec. side slopes
Total primary slope, including mag and reflect sec slopes:
Assume the maximum peak current IpeakM is limited to Vsense/Rsense:
With the propagation delay, the overshoot will be:
Leading to the following effective limit at the primary side:
Before the loop gives up, the output voltage is constant and the output current increases.
What is the valley current knowing the maximum limit is reached? That limit is reached
with a ramp including both the mag ramp and the reflected output ramp:
The magnetizing current peaks to::
The "transmitted" peak current is therefore:
Wich leads to the following output current values: