Aug 24-06

SP6138 Evaluation Manual

©2006 Sipex Corporation

Page 7 of 9

Step by step design procedures:

a.

R2 = 21.8Ω

b.

CZ3 = 85pF

c.

Let fcrsover=200KHz then:

d.

RZ2 = 60.3kΩ

e.

CZ2 = 96pF

f.

CP1 = 1.1pF

g.

RZ3 = 0.75KΩ

h.

CF1 = 18pF to stabilize SP6138ER1 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 the circuit schematic of page

1 were used for optimum operation.

Figure 12- Gain/Phase measurement of SP6138EB shown on page 1, cross-over

frequency (