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)