Datasheet
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
loop compensation and the TPS6210X series of converters (continued)
The circuit shown in Figure 3, implements an origin pole, two zeros and a high frequency pole. A second high frequen-
cy pole will be added by the response of the error amplifier. If desired, this additional pole can be controlled by adding
a capacitor across the series R–C from COMP to FB.
UDG–00131
REF
R4
C2
C1
R2
EAO
R3
G
0
f
z1
f
z2
f
p
R1
+
VOLTAGE WAVEFORM
V
EAO
V
OUT
V
OUT
Figure 3. Compensation Network and Gain Response
In this schematic and line approximation of response, the components are calculated as follows:
R
1
R
2
V
OUT
V
REF
V
REF
R
4
R
1
R
2
G
0
C
2
2 f
z1
R
4
1
C
1
2 f
z2
R
1
R
2
1
R
3
2 f
p
C
1
1
(2)
(3)
(4)
(5)
(6)