Feb21-07

SP7662 Evaluation Manual

©2007 Sipex Corporation

Page 6 of 11

Figure 9. Voltage Mode Control Loop with Loop Dynamic for Type III Compensation

The simple guidelines for positioning the poles and zeros and for calculating the

component values for Type III compensation are as follows. As a particular example, consider

for the following SP7662EB with a Type III Voltage Loop Compensation component selections:

Input requirements and inductor selection

Select L = 2.7uH => yield

≈ 25% of maximum 12A output current ripple

≈ 3mΩ)

fs = 300kHz SP7662 internal Oscillator Frequency