Where α is the total harmonics balance and ΔV_EA is the output voltage range of the voltage error amplifier. G_VD is the voltage divider gain. The gain of the voltage error amplifier at the second harmonic is shown in equation (10) and (11).

G_{EA_SH} and Z_{EA_SH} are error amplifier gain and impedance at second harmonic frequency. G_mV is voltage error amplifier transconductance. To ensure sufficient roll-off of voltage gain at second harmonic frequency C₁₆ is found from the equation (12).

The figure below shows Voltage Loop Bode Plots. To fine the values of R₁₂ and C₁₅, use the same approach described above in a current loop. The equation (13) defines gain of the boost section at crossover frequency (G_{VL_Boost_fVC}). The gain of the error amplifier in log from is determined in equation (14). The gain ensures that the closed loop Gain plot will intersect the frequency axe on Bode plots at unity gain. The value of R₁₂ and C₁₅ can be determined from equation (15) and (16).

Voltage Loop Bode Plots Click on image to enlarge.