SP6136_06 Datasheet, PDF (7/9 Pages) Sipex Corporation – Evaluation Board Manual

Step by step design procedures:
a. R2 = 21.8kΩ
b. CZ3 = 272pF
c. Let fc =80kHz then:
d. RZ2 = 34.4kΩ
e. CZ2 = 538pF
f. CP1 = 7.7pF
g. RZ3 = 0.97kΩ
h. CF1 = 22pF to stabilize SP6136ER1 internal Error Amplify
The above component values were used as a starting point for compensating the converter
and after laboratory testing the values shown in circuit schematic of page 1 were used for
optimum operation.
Figure 12- Gain/Phase measurement of SP6136EB shown on page 1, cross-over
frequency (fc) is 85KHz with a corresponding phase of 65 degrees
Rev 5/01/06
SP6136 Evaluation Manual
Copyright © 2006 Sipex Corporation
Page 7 of 9